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Lennox PWC series Magic-Pak Self Contained Heat...

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INSTALLATION AND MAINTENANCE INSTRUCTIONS PWC Series " Magic - Pak " Self - Contained Heat Pump [ WARNING Improper installation , adjustment , alteration , service or maintenance can cause injury or property damage . Refer to this manual . For assistance or additional information , consult a qualified installer or service agency . I _ ' WARNING I TABLE OF CONTENTS For your safety , do not store or use gasoline or other flammable vapors and liquids in the INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 vicinity of this or any other appliance . Such actions could result in property damage , per - sonal injury or death . OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Installation and servicing of air conditioning WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 equipment can be hazardous due to internal refrigerant pressure and live electrical compo - WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 nents . Only trained and qualified service personnel should install or service this equip - ment . Installation and service performed by ManufacturedBy unqualified persons can result in property A . A . C . damage , personal injury or death . A Lennox International Company 421 MonroeStreet Bellevue , OH 44811 ] A CAUTION I These units are not approved for mobile home applications . Such use could result in prop - IIIIIIIIIIII ) llllllllllllllllllllllllll } lilllllll erty damage , p _ rsonal injury or death . I A CAUTION [ The installation of this appliance must conform to the requirements of the National Fire Protection Associa - tion ; the National Electrical Code , ANSl / NFPA No . 70 ( latest edition ) in the United States ; the Canadian Electrical Code Part 1 , CSA 22.1 ( latest edition ) in Canada ; and any state or provincial laws or local ordi - nances . Local authorities having jurisdiction should be consulted before installation is made . Such appli - cable regulations or requirements take precedence over the general instructions in this manual . Save these instructions for future reference
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INSTALLATION the unit inside the carton if the carton is damaged . File a cfaim with the transportation company . If any damages General are discovered and reported to the carrier DO NOT INSTALL THE UNIT , as claim may be denied . = . se instructions explain the recommended method of , llation of the PWC heat pump unit and associated Check the unit rating p'late to confirm specifications are as ordered . e _ uctricalwiring . Location This unit is designed and approved for use as a self - contained air to air heat pump system . The design is certified for through - the - wall installation only . These instructions , and any instructions packaged with The interior portions of the unit may be surrounded by a closet with clearances to combustible material held to 0 " at mating components and / or accessories , should be carefully read prior to beginning installation . Note particularly any sides , 0 " top and 0 " front of the plenum . CAUTIONS or WARNINGS in these instructions and all la - bels on the units . The grille side of the unit may be flush with , or extend beyond , the face of the exterior wall , but should not be recessed more than 2 " from the face of the building and These instructions are intended as a general guide only , for use by qualified personnel and do not supersede any should not be obstructed with trees , landscape materials national or local codes in any way . Compliance with all or building structure . local , state , provincial or national codes pertaining to this There is no minimum clearance required on locating the type of equipment should be determined prior to installa - tion . unit to an interior corner of a building . If the unit is to be enclosed , provisions should be made allowing access to Inspection the indoor side of the unit for changing filters and for inspection . At least 33 " of unobstructed space should be Upon receipt of equipment , carefully inspect it for possible provided infront of the indoor side , whether enclosed or not , to permit removal of the cooling chassis should shipping damage . If damage is found , it should be noted repairs or inspection be required . on the carrier's freight bill . Take special care to examine PWCInstallation Sleeve F MinimumOpening to Align with Return Air Opening In Unit . VibrationIsolating Matedal { TopLayer ) Fin - re 1
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. If the unit is installed in a residential garage , it must be Seal the space between the unit and building opening located or protected to avoid physical damage by vehicles . using a non - hardening caulking compound . The seal The unit must be installed so that no electrical compo - must be weathertight to prevent entrance of moisture and water into the building . Make sure the drain holes nents are exposed to water . in the base are not plugged with caulking , I Condensate Drain [ A CAUT , O ] N This unit must be installed level to allow for Install the plastic drain tube ( furnished ) over the 5 / 8 " O . D . proper drainage of the chassis base pan and fitting welded to the center of the condensate pan . Con - unit drain pan . nect the other end of the drain tube to trapped drain line ( see Figure 2 ) . The plastic drain connection to the chassis base is provided so that it may be disconnected from the Installing With a Wall Sleeve permanent drain tubing in the base of unit in the event it becomes necessary to remove the chassis assetnbly . The drain line should pitch gradually downward at least 1 " [ _ , CAUTION l per 10 feet of horizontal run to the open drain . The sleeve is not intended as the sole support for the unit . An additional support must be Be certain that the plastic drain tubing has free drainage provided near the return opening on the unit and is not crimped or flattened at any bend . for adequate support . The use of vibration isolation material between the unit and the PWC Drain Installation support is recommended . Refer to the installation instructions packed with the wall sleeve and Figure 1 for guidance in assembly and mount - ing using a wall sleeve . Make sure the gaskets attached to the sleeve are not Drain Pan _ damaged . Seal the space between the wall sleeve and - the building opening with non - hardening caulking compound . The seal must be weathertight to prevent entrance of moisture and water into the building . Assure that the unit is completely seated against the gaskets on the wall sleeve . Installing Without a Wall Sleeve Figure 2 Limitations Refer to the following directions and Figure I for guidance in installing the unit without a wall sleeve : The unit should be installed in accordance with all national . Measure the size of the unit and provide an opening in and local safety codes . an outside wall that will accept the unit . Local ordi - nances may require a steel lintel to support the wall Limitations of the unit and appropriate accessories must also be observed . above the opening . The opening must be square in all 4 corners . The unit must not be installed with any ductwork in the , outdoor air stream . The outdoor fan is not designed to Position the unit so that the grilles on the outside face of the unit are flush or extend beyond the face of the operate against any additional static pressure . exterior wall , but not recessed more than 2 " from the face of the building . Provide a support under the Minimum and maximum operation conditions must be observed to assure maximum system performance with unit , inside the building . Make sure that the inside minimum service required . Refer to Table 1 on page 4 for support does not block the return air . The unit should be installed level the application limitations of the unit .
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Application Limitations AirFilter All indoor return air must be filtered . A permanent - type Outdoor Ambient Air Temperature ° F filter is furnished with the unit , located directly behind the access panel . Removing the panel permits access to the Minimum DB - Cooling Maximum DB filter . Cool Heat 65 The filter should be cleaned at least three times during 125 75 each of the heating and cooling seasons , or more fre - quently if unusual conditions are encountered . To clean the permanent filter , shake filter to remove excess dirt Indoor Ambient Air Temperature ° F I and / or use a vacuum cleaner . Wash filter in soap or Minimum Maximum detergent water and replace after filter is dry . It is not necessary to oil the permanent filter after washing . DB / WB DB DB , _ VB DB If an installation is . made in which it is more desirable to Cool Heat Cool Heat mount the filter exterior to the unit , in the return duct work or elsewhere , the permanent filter can be used or re - 62 / 57 50 90 / 72 80 placed with a disposable filter . If a disposable filter is used , use the information provided in Table 2 when sizing the disposable filter . Table t Ductwork Minimum Required Surface Area for Disposable Filters Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America ( ACCA ) . Model Number Filter Area ( minimum ) PWC183 - 480 square inches It is recommended that supply and return duct connec - - ' _ s at the unit be made with flexible joints . PWC24 , 3 480 square inches 1ne supply and return air duct systems should be de - signed for the CFM and static requirements of the job . Table 2 They should not be sized to match the dimensions of the duct connections on the unit . Thermostat Supply duct flanges are shipped flat and must be bent The room thermostat should be located on an inside wall up before attaching the supply duct . where it will not be subject to drafts , sun exposure or heat To connect the return duct to the unit , use a straight piece from electrical fixtures or appliances . Follow the manufacturer's instructions enclosed with the thermostat of duct 22 " wide by 7 " deep . Insert the duct into the return opening in the bottom of the unit . Flange the duct over the for general installation procedures . Color coded insulated wires ( # 18 AWG ) should be used to connect the thermo - existing flanges around the opening inside unit . Make stat to the unit . sure that all sides of the duct are flanged over to permit removal of cooling chassis if required . Use a flexible Electrical Connections connection to attach remainder of return duct . The return duct should be sealed to the unit casing and terminate outside the space contai _ ningthe furnace . All wiring must be done In accordance with the National Electrical Code ( NEC ) , ANSl / NFPA No . 70 The return duct must allow for the unit drain pan ( latest edition ) ; Canadian Electrical Code CSA C22 . 2 connections and drain tube . Part I ( latest edition ) ; or local codes , where they prevail . Any alteration of internal wiring will void certification and warranty . [ ACAUTION J Units are factory wired for a 230 volt power supply . If no not screw into the side of the drain pan . power supply is 208 volts , it will be necessary to change a wire connection on unit transformer from 240 volt terminal to 208 volt terminal as shown on the wiring diagram .
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Usewiringwithatemperaturleimitation of 75 = C mini - is time / temperature initiated and temperature terminated mum . Run the 208 or 230 volt , 60 hertz electric power with a maximum defrost time ( time - out ) of 10 minutes . supply through a fused disconnect switch to the control box of the unit and connect as shown in the wiring dia - Time between defrost cycles is preset at 60ominute intervals at the factory , but can be field adjusted between gram located on the inside of the control access panel . 30 , 60 or 90 minutes . To field adjust time between defrost The unit must be electrically grounded in accordance with cycles , place defrost time plug in the proper position ( see local codes or , in the absence of local codes , with the Figure 3 ) . For best performance in Region IV , the National Electrical Code ANSI / NFPA No . 70 ( latest edition ) PWC243 defrost interval should be adjusted to 30 min - utes . or CSA C22 . 2 Part 1 ( latest edition ) . Power supply to the unit must be NEC Class 1 and must Defrost control will initiate a defrost cycle if the time period comply with all applicable codes . A fused disconnect has elapsed and the defrost sensor sees a temperature switch should be field provided for the unit . The switch below freezing . At the start of a defrost cycle , the defrost must be separate from all other circuits . If any of the wire control will energize the reversing valve solenoid , shifting supplied with the unit must be replaced , replacement wire the reversing valve and de - energizing the outdoor fan . must be of the type shown on the wiring diagram . The defrost relay will also close , energizing auxiliary heat for increased comfort during defrost . The unit will remain in defrost mode until the defrost sensor has determined Electrical wiring must be sized to minimum circuit that the frost has been removed from the coil or a 10 - ampacity marked on the unit . Use copper conductors only . Each unit must be wired with a separate branch minute time period has elapsed . circuit and be properly fused . The defrost control is also equipped with a setof pins to OPERATION aid in troubleshooting of the defrost system ( see Figure 3 ) . The following is a brief outline of the testing of the defrost Sequence of Operation system . . Defrost sensor must be closed , 32 ° F or below . If Cooling temperatures are such that switch will not close , When the thermostat is in the cooling mode , the O circuit jumper between defrost sensor terminals on the is powered which energizes the reversing valve . Upon defrost control , cooling demand , the thermostat closes circuit R toY and G . Closing R to Y closes the unit contactor , starting the 2 . Start system in heating operation . compressor and outdoor fan . The thermostat automati - . cally closes R to G circuit which also brings on the indoor Jumper test pins , A 1 / 4 " quick connect terminal blower at the same time . Upon satisfying cooling demand , crimped onto a solid wire or brazing rod works well for the thermostat will open the above circuits and open the test jumper . Closing test pins speeds up time interval main contactor , stopping the compressor and outdoor fan . by a factor of 256 . If the unit is equipped with a time delay , the blower will continue to operate for 90 seconds which improves Defrost Control system efficiency . Heating Defrost TestPins . , , i , = Upon heating demand , the thermostat closes circuit R to Y , which closes the unit contactor , starting the compressor and outdoor fan . The reversing valve is not energized in Defr / o = the heating mode . - The thermostat again automatically TimePlug brings on the indoor fan at the same time . The second stage of the thermostat closes circuit R to W , which closes the unit sequencers , bringing the auxiliary electric heat on . Upon satisfying heating demand , the thermostat opens the above circuits and stops unit operation . Defrost Control Setting Defrost Test Cycle Time Defrost Cycle 30 minutes 7 seconds If the outdoor ambient conditions are such that frost forms 60 minutes 14 seconds on the outdoor coil , the defrost control monitors the need 90 minutes 21 seconds for and initiates and terminates defrost cycles as neces - sary to maintain system performance . The defrost control FinHr
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Motors After closing test pins and appropriate cycle time has elapsed , the reversing valve should shift to defrost mode and the outdoor fan should stop . After 2 seconds of The indoor and outdoor fan motors are permanently defrost operation , the reversing valve should shift back to lubricated and require no maintenance . " , tingoperation and the outdoor fan should start . Outdoor Coil System Performance Foreign material should not be allowed to accumulate on For maximum performance of this heat pump system , the the outdoor coil surface or other parts in the air circuit . operating temperatures and pressures should be checked Cleaning should be as often as necessary to keep the coil clean . Use a brush , vacuum cleaner attachment or other and superheat determined at Standard ARI test conditions suitable means . Be sure power to unit is shut off of 82 ° F outdoor - 80 ° F indoor dry bulb / 67 ° F wet bulb . If superheat measured deviates from the values given in before using water to clean the coil . Table 3 , refrigerant charge should be adjusted accordingly Care should be used when cleaning the coils so that for maximum performance . the coil fins are not damaged . Outdoor Base Drain Suction Superheat Foreign material should not be allowed to clog the drain Suction Superheat Outdoor hole . inspect and clear drain opening prior to heating @ ARI Conditions Unit season . 82 ° OD Model 80 ° IDDB / 67 ° IDWB PWC183 18 ° - 20 ° F PWC243 17 ° - 19 ° F Table 3 MAINTENANCE Shutoff all electrical power to the unit before conducting any maintenance procedures . Failure to do so could cause personal injury . Periodic inspection and maintenance normally consists of changing or cleaning filters and ( under some conditions ) cleaning the coils . Filter Inspect the filter once a month . Replace disposable filter or clean the permanent - type filter as necessary ( a mini - mum of three times each heating or cooling season is recommended ) . Do not replace permanent - type filter with a disposable filter unless an installation was made in which the filter was mounted exterior to the unit ( see Air Filter section on page 4 ) .
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UNE VOLTAGE - FACTORY UNE VOLTAGE - RELD NOTE : 208 / 230 - 1 - 60 . . . . . . . . UNE VOLTAGE - RELD ( IF USED ) POWERSUPPLWY ITHMIN . IF ANY OF THE ORIGINAL LOW VOLTAGE - FACTORY 75 " CCOPPERWIRE WIRES ARE REP _ , THEE . . . . . . . . . . LOW VOLTAGE - FI ELD SAME SIZE AND TYPE WIR I CIRCUIT1I I ( lo _ cO _ L'qCIIRCUIT2 MUST BE USED . BLUE • ; . . ; : : 7 AND 10 PWC ONLY P _ D BLACK CONNECTOR I CONDENSER FAN BLACK BLOWER LOWER MOTORvloI _ rr ( BROWN RED M1 CAPACr _ R - RUN REV VALVE © DEFROST SENSOR Connection Diagram PWC with 5 , 7 or 10 KW Heat Strip Part # 41164 - 3 Fin . r = = 4
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UNE VOLTAGE - FACTORY . . . . . LINE VOLTAGE - RELD NOTE : 208 / 230 - 1 - 60 : OWER SUPPLY WITH MIN . . . . . . . . . LINE VOLTAGE - FIELD ( IF USED ) IF ANY OF THE ORIGINAL 75 " C COPPER WIRE LOW VOLTAGE - FACTORY WIRES ARE REPLACED , THEE . . . . . . . . . . LOW VOLTAGE - R ELD SAME SIZE AND TYPE WIR I CIRCUIT 1 I CIRCUIT 2 MUST BE USED . BLUE : i : : : • UMrT RED F _ CONNECTOR BLOCK CONDENSER FAN E _ CK BLOWER m ¥ NT CAPACITOR - RUN I RED REVLVE VA O DEFROST Connection Diagram PWC with 15 KW Heat Strip Part # 42203 - 2 I
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LINE VOLTAGE - FACTORY 208 / 230 - 1 - 60 . . . . . UNE VOLTAGE - FIELD POWER SUPPLY WITH MIN . . . . . . . . . UNE VOLTAGE - FIELD ( IF USED ) 75 " C COPPER WIRE LOWVOLTAGE - FACTORY THERMOSTAT . . . . . . . . . . LOW VOLTAGE - FIELD NOTE : IF ANY OF THE ORIGINAL WIRES ARE REPLACED , THEE SAME SIZE AND TYPE WIR MUST BE USED . CONDENSER FAN BLOWER MOTOR BLOWER I _ ) BROWN RED _ - RUN RE ) : : ° ! , POTENTIAL RELAYSe _ pF U Connection Diagram PWC with No Heat Strip Part # 45322 - 1 I Fin - r = = 6
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Limited Warranty I August 1 , 1997 Thiswarran ( ygivesyou specificlegalrightsand you may have otherrights which varyfrom state / provincetostate / province . Warrantor : Armstrong Air Conditioning Inc . , 421 Monroe St . , Bellevue , OH 44811 Armstrong Air Conditioning Inc products are available under the following names : Air Ease , Armstrong Air , American Airs , Concord Subject to the limitafions . stated in this warranty , we warrant to the first buyer for use the residential heating , cooling or heat pump unit , when installed , operated and maintained as required by this warranty , to be free of defects in workmanship or material for a pehod of five years ( two years for commercial equipment ) from the time of installation . We will replace any defective component without cost or expense to you except for the costs of delivery and labor for removal and replacement of the defective component . Warranty Begins The warranty period begins when the installafion is complete and the product is ready to operate . You must be able to verity this date whenever a warranty claim is made . Original bill of sale , installer's invoice or other similar document will suffice . . If the beginnir _ g date cannot be Verified . we will consider warranty coverage to begin six months after the date the product was shipped from our factory . Limitations o n Implied Warranties Implied warranties of merchantability or , to the extent applicable , fitness for a particular purpose are timited to five years , the same duration as the basic limited written warranty provided herein . Some states / provincas do not allow limitations on how tong an implied warranty of merchantability or fitness lasts , so the above limitations dr exclusions may not apply to you . Only Warranty This written Limited Warranty is the only warranty made by the warrantor ; this warranty is in lieu of and excludes all other warranties , express or implied . The warrantor does not authorize any person to provide any other warranty or to assume for it any further obligation in connection withthe warranted product . What is NOT Covered I . Cabinets or cabinet pieces . 2 . Normal maintenance items such as filters , fan belts , fuses or other consumable items . 3 Damage caused by misuse , failure to maintain properly , accidents or acts of God . 4 External wiring , piping , venting or attachment of accessory products not integral to our product , including without limitation , humidifier , air cleaner , vent damper , thermostat or other mechanical devices not manufactured by the warrantor . 5 Products that have been operated in a corrosive atmosphere where e concentration of acids , halogenated hydrocarbons or other corrosive elements causes deterioratfon to metsi surfaces or integral components . NOTE : Operation in a corrosive atmosphere is considered abuse and voids this warranty 6 Products that have NOT been installed in accordance with our published installation instructions , applicable focal , state / provincial or national codes , ACCA published standards . 7 Products that have NOT been installed by competent , qualified installers . 8 Products that have been moved from their odginai place of installation . Warranty on Replacement Components Any replscement component furnished by us will assume the remaining ( unused ) portion of the Limited Warranty . Consequential Damages The warrantor shall not be responsible for any consequential damages caused by any defect in the product . Some state / provinces do not allow the exclusion or limitations of incidental or consequential damages , so the above limitation or exclusion may not apply to you . NOTE : After the first year , in the event that a gas or oil heat exchanger is no longer being manufactured by the warrantor , the warrantor will allow a credit equal to the then current wholesale price of an equivalent heat exchanger towards the purchase of a new Armstrong gas or oil furnace . This product must be installed , used and cared for in accordance with the instructiott manual You are responsible for required pedodic maintenance or service , such as changing or cleaning of air filters and lubrication or cleaning of components . Failure to properly install , operate or maintain your unit voids this warranty . Owner Record ! Model # Serial # Installation Date , INSTALLED BY : Address Telephone # License # I ealer
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INSTALLATION INSTRUCTIONS Wall Sleeve Kit CA239 For Use With HW / HWC / EWC / PWC Series Magic - Pak Thru - the - Wall Unit _ WARNING age _ General Parts List The wall sleeve is designed to facilitatethe installationof Magic - Pak units by providingan accurateopeningduring Quantity Description buildingconstruction . The use of a wall sleeve allows units to remain off - siteuntilbuildingconstructionapproaches 1 Top Panel completion . 1 BottomPanel The wall sleeve is comprised of four assemblies ( top , bottom , and rightand left sides ) which easily slip 1 Right Side Panel togetheron the job to form a rectangularbox correctly 1 Left Side Panel sizedto receive a Magic - Pak unit . 2 Squaring Braces When inplace and securely fastened , the wall sleeve openingprovideseasy access to the finishedwall pedm - 1 Top SupportAngle efar for caulksealing . 2 Side SupportAngles The weather - seal caulkingis easier to performwhen the sleeve protrudesbeyondthe finishedwall by 3 / 8 " to 1 " . 24 # 8 x 3 / 8 " Screws 1 InstallationInstructions Inspection of Shipment If any damage to the contentsof this kit is found at the time of delivery , propernotificationshould be made onthe carrier's freight bill . Damage claimsshould be filed with the carrierat once . Claims of shortage should be filedwith the manufacturerwithin 5 days . Manufactured By A . A . C . A Lennox International Company 421 Monroe Street Bellevue , OH 44811 1I1l1l11I1lI1ll1Il1II1IIR1III1IIIi1IIIllII1I111 Save these instructionsforfuture reference
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4 . INSTALLATION Attachthe support angles to top and side panels usingthe # 8 x 318 " screws provided . Two sets of holes are providedin the panels for attaching the support Wall Sleeve Assembly angles . Use the rowof holes nearest the front of the sleeve to attach the support angles for 1 " spacing or Toassemble the wall sleeve , refer to the followinginstruc - the second set of holes for 3 - 3 / 4 " spacing . tions and Figure 1 . The wall sleeve must be square in opening before 1 . Slide top panel over side panels untilretaining clips securing sleeve to building . This is requiredto are engaged in slottedopenings . assure the Magic - Pak unitwill slide intothe sleeve . 2 _ Place side and top assemblydown withthe front 8 . Caulk all seams where the bottom panel joins to the flange against floorand slide bottom panel into side side panels includingthe front corners of the bottom panel slip strips untiltabs on bottom panels are locked panel and the top of side panel slipjoints . Caulk inplace . sealing is best accomplishedafter the wall sleeve is assembled butbefore Ris placed inthe wall opening . 3 . Attach squaring bracesto top and side panels using Remainingfinal caulk sealing can be done just after existingholes . ( Do not remove braces untilwall sleeve the sleeve is secured intothe wall opening , if desired , is secured to building . ) to avoid breakingthe seal duringhandling . Wall Sleeve Assembly TopPanel P / N33021B000 Frontof Squaring Left Side Panel P / N 33024B001 Braces P / N33048B000 RightSide Panel P / N 33024B002 - Side SupportAngle PIN 33027BG00 - 2 Side = Figure I
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Further sealing against air infiltrationmust be done alter sleeve opening . However , if the wall openingcan be larger inverticaldimensionthan the wall sleeve so that the the Magic - Pak unit is installedin the wall sleeve and utility bottomcan rest ona sill that is at least 2 " higher thanthe connectionshave been completed ( see Sealing / Weath - erproofing Wall Sleeves section ) . bottomof the wall opening , some recessing is permitted . Wall Sleeve Installation This sillshould be recessed further than the sleeve by 3 / 8 " to 1 " to permitweather - seal caulking along the bottom The wall sleeve may be installedfrom either the insideor edge withoutpluggingthe drain holes in the sleeve . outsideof the building . The topof the wall opening should be above the topof the Some builderswill attach the wall sleeve to the support wall sleeve by a dimensionequal to or greater than the amountof the recess in orderto avoid restrictionof the wallthroughthe side supportangles whether they are insertingthe sleeve fromthe outsideor the inside . Othem condenserdischargeair . willuse the side angles simplyas a locating " stop " to achievethe appropriatedimensionwhile shootingfasten - Sealing / Weatherproofing Wall Sleeves ers throughthe sides of the wallsleeve into the supporting wall . In either case , the wall sleeve must be fastened to A highgrade non - hardeningcaulking compoundapproved the supporting wall and notto the finished wall . forexterioruse must be applied outsidearound the perimeterof the wall sleeve and the finished wall . Caulk The sleeve may extend farther than 1 " beyondthe finished shouldalso be applied around the sleeve's perimeter and the finishedinteriorwall . wall , but reaching the perimeter of the openingfrom inside for sealing becomes increasinglydifficult . In any case , adequate safety precautionsmust be consideredto Final sealingagainst air infiltrationmust be done alter the protectpersonnel . Magic - Pak unit is installedin the wall sleeve . For additional protection , the space between the unit and the wall sleeve shouldbe sealed on all sideswith a bead of sealant . Instailing Wall Sleeve from Inside The most popular method of installingthe wallsleeve is from the inside of the buildingwiththe weather seal Wall Sleeve Dimensions ( in . ) applied from the outsideas the finishwall is applied . < . . 1or 3 _ / 4 Instalflng Wall Sleeve from Outside In many high - rise constructionapplications , contractors . 16 , . . _ 15 or 12 _ insert the wall sleevesfrom the outsidewhile the wall is - $ - - beingconstructed . The two - sidedsupport angles should then be attached to the wall sleeve sides at a locationthat will exceed the thicknessof the outsidefinish wall bythe recommended 3 / 8 " to 1 " dimension . I i 45 For example , if the supportingwall is concreteblockwith a brickfacing , there is usuallya space betweenthe block and the brick . This space dimensionmust be added to the 2 - - I = I I width of the brick ( plus 3 / 8 " to 1 " ) so that when the sleeve is inserted intothe blockwall opening , up to the angles ! _ t . _ and fastened to the blockwallbefore the brick is installed , the sleeve wilt protrudebeyondthe finished brickby 3 / 8 " I . - - - - z9 - - , 4 to 1 " , as needed for caulk sealing . Flar _ es may b _ assembl _ l 1 " or 5 _ / 4 " from this e _ e of the elc _ v _ The same applies if the supportingwall iswood frame . One may insert the sleeve fromthe outside upto the angles located on each side , allowingforthe thicknessof Figure 2 sheathing , finishsiding , and caulk sealing . Recessed Sleeves In some applications , where either the buildingwallsare very thick ( over 16 " ) or architecturaldesign dictates , units can be recessed . Avoidrecessingthe wall sleeve ifthe wallopening is requiredto be the same size as the wall
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I _ A _ IT _ ° 4 . " 948 ° 96 - - - - I I INSTALLATION AND MAINTENANCE INSTRUCTIONS PWCSERIES SELF - CONTAINEHDEATPUMP ManufacturedBy ARMSTRONG AIR CONDITIONING INC . A LENNOXInternationalInc . Company 421 MonroeStreel
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I PART . OI . , , , , RO . . I OAT1E2 ' ' 0 I SUPERSI EOES I PAGE2OF , 0 GENERAL Theseinstructionsexplainthe recommendedmethod of installationof the PWCheatpump unit and associatedelec - trical wiring . This unit is designed and approvedfor use as a self - containedair to air heat pump system . These instructions , and any instructions packagedwith maling componentsand / or accessories , shouldbe carefully read priorto beginning installation . Note parliculady any CAUTIONSor NOTESin theseinstructions andall labels on the unit . Theseinstructionsare intendedasa generalguideonly . for use byqualifiedpersonnel , anddo notsupersedeanyna - tionalor localcodesinany way . Compliancewithalllocal , state , provincial , or nationacl odespertainingto thistypeof equipmentshouldhe determinedprior to installation . INSPECTIONOF SHIPMENT Uponreceiptof equipment , carefullyinspectit forpossibleshippingdamage . If damageis found , it shouldbe noted on the carder's freightbill . Take specialcare to examinethe unit insidethe cartonif the cartonis damaged . File a claimwith the transportationcompany . If any damagesare discoveredand reportedto the carrier DO NOTINSTALLTHE UNIT as claim may be denied . Checkthe unit rating plate to confirmspecificationsare as ordered . CAUTION : INSTALLATIONAND SERVICINGOFAIR CONDITIONINGEQUIPMENTCANRE HAZARDOUSDUETO IN - TERNALREFRIGERANTPRESSUREAND LIVE ELECTRICALCOMPONENTS . ONLYTRAINEDANOQUALIFIEDSER - VICE PERSONNELSHOULDINSTALL , REPAIR , OR SERVICETHIS EQUIPMENT . WARNING FORYOURSAFETY DONOTSTOREOR USE GASOLINEOROTHERFLAMMABLEVAPORSAND LIQUIDSIN THE VICINITYOFTHIS ORANY OTHERAPPLIANCE . NOMENCLATURE : 10 PWC 242 A - 1A 1 2 3 4 5 1 . ELECTRICHEATING 4 . ElectricalRatingCode : 5 = 5kW A = 208 / 230 volts ; OOHz ; 1 phase , 7 = . 7kW 10 = 10kW 5 . RevisionCode 15 = 15kW 2 . PWC = ( HEAT ) PUMPWITH COOLING 3 . COOLINGCAPACITYTONNAGE 182 = 1 ½ TON 242 = 2 TON 302 = 2 ½ TON
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PARTNO . I 41194BOg6I DATE I 2 - 1 - 96 I SUPERSEDEI S 411940094 I PAGE3OFIO I LOCATION Thedesignis certifiedfor through - the - wallinstallationonly . Theinteriorportionsof the unit may be surroundedbya closetwith clearancesto combustiblematerial held to 0 " at sides , 0 " top and O " frontof the plenum . Thegrille sideof the unitmay be flush with orextendbeyondthe faceof theexteriorwall , butshouldnotberecessed morethan two ( 2 ) inchesfrom the face of the buildingand shouldnotbe obstructedwithtrees , landscapematerials , or buildingstructure . Thereis nominimumclearancerequiredonlocatinga unitto aninteriorcornerofa building . If theunit is to beenclos - ed , provisionsshouldbemadeallowingaccessto the indoorsideof the unitfor changingfilters . and forinspection . At least 33 " of unobstructedspace should be providedin front of the indoorside . whetherenclosedor noL to permit removalof the coolingchassisshouldrepairsor inspectionbe required . If this unit is installedin a residentialgarage it must be locatedor protectedto avoidph _ , sicadl amageby vehicles . This unit must be installedso that no electricalcomponentsare exposedto water . INSTALLATION CAUTION : THESLEEVEIS NOTINTENDEDAS THESOLESUPPORTFORTHEUNIT . ANADDITIONALSUPPORTMUST BE PROVIDEDNEARTHE RETURNOPENINGON THE UNIT FOR ADEQUATESUPPORT . THE USE OF VIBRATION ISOLATIONMATERIALBETWEENTHE UNIT AND THE SUPPORTIS RECOMMENDED , CAUTION : THIS UNITMUST BEINSTALLEDLEVELFORPROPERDRAINAGEOFTHE CHASSISBASEPANAND UNIT DRAINPAN . WITHOUTWALLSLEEVE Measurethe sizeofthe unit andprovidean openingin an outsidewall that will acceptthe unit . Localordinancesmay require a steel lintel to supportthe wall abovethe opening . This openingmust be square in all corners . Positionthe unit sothat the grilleson the outsidefaceof the unit are flush or extendbeyondthe faceof the exterior wall , but notrecessedmorethantwo ( 2 ) inchesfromthe faceof the building . PROVIOEA SUPPORTUNDERTHE UNIT INSIDETHE BUILDING . Make sure that the insidesupportdoesnot blockthe returnair . The unitshouldbe installed level . Sealthe spacebetweenthe unit and the buildingopeningusinga non - hardeningcaulkingcompound . Theseal must be weather - tightto prevententranceof moistureandwater intothe building . Make sure the drainholesin the base are notpluggedwith caulking . WITH WALL SLEEVE Seethe installationinstructionspacked with Ihe wall sleeveto assembleand mountin a wall . Make sure that the gasketsattachedtothe sleeveare notdamaged . Assurethat the unit is completelyseatedagainstthe gasketsonthe wall sleeve . Seal spacebetweenwall sleeveand buildingopeningusingnon - hardeningcaulkingcompound . This seal must be water tight . CONDENSATEDRAIN Install the plasticdraintube ( furnished ) overthe 5 / 8 " O . O . fittingwelded to the condensatepan . Connectotherend of the draintubeto trappeddrain line ( See Figure2 ) . Theplasticdrain connectionto thechassisbaseis providedso that it may be disconnectedfromthe permanentdrain tubingin the baseof unit in theeventit becomesnecessaryto removethe chassisassembly . The drain line should pitch gradualtydownwardat least 1 " per 10 footof horizontalrun to the open drain . Be certainthat the plasticdrain tubing has tree drainageand is notcrimpedor flattenedat any bend . L
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PA . T . OI . , , , , _ , , . 0 _ I , 0 ' , ' _ I _ ' " _ I SU " ERSIEO " " _ E " S00 _ " I PA _ E , ' O _ , O FIGURE1 INSTRUCTIONFORSUPPORTINGPWCUNITS Wall Sleeve 7 x 22 Min . OpeningTo A # ignwith'Return Air Openingin Unit . VibrationIsolatingMaterial % Plywood FIGURE2 5 / 8 " I . D . PLASTIC ( FURNISHED ) DRAINPAN CHASSISDRAIN ' ASSEMBLY ( FURNISHED ) 5 / 8 " I , O . PLASTIC TU " BE ( FURNISHEO ] 5 / 8 " O . O . DRAIN _ LINEAND TRAP \ ( iNSTALLERSUPPLIED ) RETURN AIR DUCT \
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. ARTNOI . " f9 " BogI OATIE 2 " t'g6I . SUPERISE4O11E9S ' 00 [ 94PAGESOFtO LIMITATIONS The unit shouldbe installedin accordancewith all nationaland local safetycodes . Limitationsof the unit and appropriateaccessoriesmust also be observed . The unit must NOTbe installedwithany ductwork in the outdoorairstream , Theoutdoor fan is notdesignedto operate againstany additionalstatic pressure . Minimum and maximum operating conditionsmust be observedto assure maximumsystem performancewith minimum servicerequired , TABLE1 - APPLICATIONLIMITATIONS OUTDOORAMBIENTAIR TEMP . OF INDOORAMBIENTTEMP . ° F MIN , DB - COOL MAX , DB MIN . MAX . 65 COOL HEAT OB / WB DB DB / WB DO 125 75 COOL HEAT COOL HEAT 62 / 57 50 90 / 72 80 DUCTWORK Ductwork should be designedand sized accordingto applicablemethods fromthe Air ConditioningContractorsof America ( ACCA ) . It is recommendedthat supplyand return duct connectionsat the unit be made with flexible joints . ' The supplyand return air ductsystemsshouldbe designedforthe CFM staiicrequirementsof the job . Theyshould NOT be sized Io match the dimensionsol the duct connectionson the unit . NOTE : SUPPLYDUCTFLANGESARESHIPPEDFLATAND MUSTBEBENTUP BEFOREAFI'ACHINGTHESUPPLYDUCT , Toconnectthe returnducttothe unJt , usea straightpieceof duct22 " wideby 7 " deep . Insert theductintothe return openingin thebottomofthe unit . Flangethe ductoverthe existingflangesaroundthe openinginsideunit . Make sure thatall sidesof the ductare flangedoverto permitremovalof coolingchassisif required . Usea flexibleconnectionto attach remainderof returnduct . The returnductshouldbe sealedto the unitcasingand terminateoutsidethe space containingthe furnace , NOTE : THE RETURNDUCTMUST ALLOWFORTHE UNIT DRAINPANCONNECTIONSAND DRAINTUBE . CAUTION : 00 NOT SCREWINTO THE SIDEOF THE DRAIN PAN . AIR FILTER All indoorreturn airmust befiltered . A permanent - type filter is furnished withtheunit . locateddirectly behindthe ac - cess panel . Removingthe panel permitsaccessto the filter . The tilter shouldbe cleanedat leastthreetimesduringeach of the heatingandcoolingseasons , ormorefrequently if unusual conditionsare encountered . To cleanthe permanentfiller , shake filter to removeexcessdirt and / or use vacuumcleaner . Washtilter in soapor detergentwater and replacealter filteris dry . The filter suppliedneed not be oiledalter washing .
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It an installation is made in which it is more desirable to mount the filter exterior to the unit , in the return duct work , or I PA . TNoI . tt9 . . o96I DATE12196 I SUPERSI E , DrigE . SDO9I . PAGEt , OO . olherwise , either the permanent filter supplied or a disposable filter may be used . If a disposable filter is used , the minimum area required is as follows : MOOELNO . FILTER AREA ( MtN . ) PWC 182 480 sq . in . PWC242 480 sq . in . PWC302 480 sq . in . THERMOSTAT The room thermostatshouldbe locatedonan insidewall whereit wilt not be subjectto drafts , sun exposureor heat from electricalfixturesorappliances . Followthemanufacturer'sinstructionsenclosedwiththe thermostatforgeneral installationprocedures . Colorcodedinsulatedwires ( # 18 AWG ) shouldbe usedto connectthe thermostattothe unit . POWERAND CONTROLWIRING ELECTRICALCONNECTIONS ALLWIRINGSHOULDBEDONEIN ACCORDANCEWITH NATIONALELECTRICALCODE , ANSI / NFPA NO . 70 ( LATEST EDITION ) . IN CANADA ( _ SAC22 . 2 Part 1 ( LATESTEDITION ) , OR WITH LOCAL CODES , WHERETHEY PREVAIL . NOTE : UNITSAREFACTORYWIREDFORA 230 VOLTPOWERSUPPLY . IF POWERSUPPLYIS 208 VOLTS . IT WILL BENECESSARYTO CHANGEA WIRE CONNECTIONON UNIT TRANSFORMERFROM240V TERMINALTO20SV TER - MINAL AS SHOWNON WIRING DIAGRAM . Usewiring witha temperaturelimitationof 75 ° C rain . Runthe 208 or 230 volt , 60 hertzelectricpowersupplythrough a fuseddisconnectswitchto the controlboxof the unitandconnectas showninthe wiringdiagramlocatedon the in - sideof the controlaccesspanel . The unit must be electricallygroundedin accordancewith local codesor in the absenceof local codeswith the Na - tionalElectricCodeANSI / NFPA No . 70 ( latest edition ) or CSAC22 . 2 Part 1 ( latest edition ) . Power supplyto the unit must be N . E . C . Class 1 , and must complywith all applicablecodes . A fused disconnect switchshouldbe field providedfor the unit . The switchmust be separatefromall other circuits . If any of the wire suppliedwith the unit must be replaced , replacementwire must be of the type shownon the wiring diagram . Electricalwiringmust be sized to minimumcircuitampacitymarkedon the unit . USECOPPERCONDUCTORSONLYI Eachunit must be wired with a separatebranchcircuitand be properlyfused . SEQUENCEOF UNIT OPERATION COOLING - Whenthe thermostatis In the coo [ ingmode , the Ocircuitis poweredwhichenergizesthe reversing valve . Uponcoolingdemand , the thermostatclosescircuitR to Yand G . ClosingR toY closesthe unitcontactor , startingthe compressoar ndoutdoorfan . ThethermostatautomaticallyclosesRto Gcircuitwhichalsobringsonthe indoorblower at thesametime . Uponsatisfyingcoolingdemand , the thermostatwill openthe abovecircuitsandopenthe maincon - tactor , stoppingthe compressorand outdoorfan . If the unitis equippedwith a time delay , the blowerwill continueto operate . for 90 secondswhich improvessystemefficiency . HEATING - Uponheatingdemandthe thermostatclosescircuit R to Y closingthe unitcontactor , startingthe com - pressorand outdoorfan . The reversing valveis notenergizedin the heating mode . Thethermostatagainautomatical - ly bringsonthe indoorblower at the sametime . Thesecondstageof the thermostatclosescircuit Rto W closingthe unitsequencers , bringthe auxiliaryelectricheaton . Uponsatisfyingheatingdemandthethermostatopensabovecir - cuits and stopsunit operation . DEFROSTCYCLE - If outdoor ambient conditionsare such that frost formson the outdoorcoil , the defrost control monitors the need for andinitiates and terminatesdefrost cyclesas neccessary to maintain system performance . The defrost controlis time / temperatureinitiated and temperature terminated with a maximum defrost time ( time - out ) of 10 minutes . Timebetweendefrost cyclesis pre - set at 60 minuteintervalsat the factory , but can be field adjustedto 30 , 60 , or 90 minutes . See illustrationfor field adjustmentof defrosttiming . For best performancein RegionIV , the PWC242defrostinterval should be adjustedto 30 minutes .
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PA . . I . o , . , , 9 . o09 . I IDNSTALLATION AN MAINTENANCE INSTRUCTIONS PWCSERIES SELF - CONTAINEHDEATPUMP PANROT . ] 4 , , 94 ° OI94OA _ ] E4 - , 5 - 9I4 SU _ RSEIOE . ESWI _ ' AGE _ O _ I IO Manulaclured By ARMSTRONG AIR CONDITIONING INC , A LENNOXInternationalInc . Company 421 Monroe Slreel Bellevue , OH 44811
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PARTNO . I 4 , tg4ooIB4DATIE4lsg , I SUPERSI EONEESWI PAGE2OFlO ! GENERAL Theseinstructionsexplainthe recommendedmethodof installationof the PWCheal pumpunit andassociatedelec - trical wiring . This unil is designed and approvedfor use as a self - contained air Io air heat pump system . Theseinstructions , and any instructions packaged wilh mating componen [ sandlor accessoriess , hould becarefully read prior to beginning inslallation , Nole parlicularly any CAUTIONSor NOTESin these instructions and all labels on the unit . Theseinslructions are intended asa generalguideonly , foruse by qualified personnel , andtie notsupersedeanyna - tionalorlocal codesinany way . Compliancewithall local , state , provincial , ornationacl odespertainingtothistypeof equipmentshouldbe determinedpriorto instaltalion . INSPECTIONOF SHIPMENT Uponreceiptof equipment , carefullyinspectil for possibleshippingdamage . If damageis found , it shouldbe noied on the carrier'sfreight bill . Take specialcare to examinethe unit insidethe cartonif the cartonis damaged . Filea claimwilh the transportationcompany , If any damages are discovered and reportedto the carrierDONOTINSTALLTIlE UNIT as claimmay be denied . Checkthe unit rating plateto confirmspecifications are asordered . CAUTION : INSTALLATIONAND SERVICINGOFAIR CONDITIONINGEQUIPMENTCAN BE HAZARDOUSDUETO IN - TERNALREFRIGERANTPRESSUREAND LIVE ELECTRICALCOMPONENTSO . NLYTRAINEDAND QUALIFIEDSER - VICE PERSONNELSHOULDINSTALL , REPAIR , OR SERVICETHIS EQUIPMENT . FORYOURSAFETY DONOTSTOREORUSE GASOLINEOROTHERFLAMMABLEVAPORSANDLIQUIDSIN THEVICINITYOF THIS I WARNING ORANY OTHERAPPLIANCE . NOMENCLATURE : 10 PWC 242 A - 1A 1 2 3 4 5 1 . ELECTRICHEATING 4 . ElectricalRatingCode : 5 = 5kW A = 208 / 230 volts ; 60 Hz ; 1 phase 7 = 7kW 10 = lOkW 5 . RevisionCode 15 = 15kW 2 . PWC = ( HEAT ) PUMPWITH COOLING 3 . COOLINGCAPACITYTONNAGE 182 = 1 ' IzTON 242 = 2TON 302 = 2 ' / 2TON
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I PA , , NOI . , , g , o09I4 DATIE ' - fS - g'I SUPERSIED , EESW I PAGE3OF , O LOCATION Thedesign is certifiedfor through - the - wallinstallationonly . The interiorportionsof theunit may be surroundedby a cJosetwith clearancesto combustiblematerial held to O " at sides , 0 " topand 0 " frontof the plenum . Thegrille sideof the unit maybe flush with or extendbeyond the faceof theexteriorwall , but shouldnot berecessed more than two ( 2 ) inchesfrom the face of the building andshould not beobstructed with trees , landscapematerials , or building structure . Thereis no minimum clearancerequired on locatinga unit to an interior corner of a building . If the unit is tobe enclos - ed , provisionsshouldbe madeallowing accessto the indoorside of the unit tot changing filters andfor inspection . At least 33 " ol unobstructed space should be provided in fronl of the indoorside , whether enclosed or not , to permit removalof the cooling chassis shouJdrepairs or inspection be required , If this unit is installed in a residential garage it must be located or protectedto avoidphysical damage by vehicles . This unit must be installed so that no electrical componentsare exposedto water . INSTALLATION CAUTION : THESLEEVEIS NOTINTENDEDAS THESOLESUPPORTFORTHEUNIT . ANADDITIONALSUPPORTMUST BE PROVIDEDNEARTHE RETURNOPENINGON THE UNIT FORADEQUATESUPPORT . THE USE OF VIBRATION ISOLATIONMATERIALBETWEENTHE UNIT AND THESUPPORTIS RECOMMENDED . CAUTION : THIS UNITMUST BE INSTALLEOLEVELFORPROPERDRAINAGEOFTHECHASSISBASEPANAND UNIT DRAINPAN . WITHOUTWALLSLEEVE Measurethe sizeof the unit andprovidean openingin an outsidewallthat willaccepttheunit . Localordinancesmay require a steel lintelto supportthe wall abovethe opening . This opening must be square in all corners . Positionthe unitsothat the gritles on the outsideface of the unit are flush or extendbeyondthe faceof the exterior wall , but notrecessedmore than two ( 2 ) inchesfrom the face of the building . PROVIDEA SUPPORTUNDERTHEUNIT INSIDETHE BUILDING . Make sure that theinsidesupport does not block the return air . The unit should be installed level . Sealthe spacebetweenthe unitandthe buildingopening usinga non - hardeningcaulkingcompound . Thesealmust be weather - tight to prevententrance ol moisture andwaterinto the building . Make surethe drainholes in the base are not plugged with caulking . WITH WALL SLEEVE Seethe installationinstructionspacked with the wall sleeveto assembleandamountin a wall . Make surethat the gaskets attachedtothe sleeveare not damaged . Assurethat the unit is completelyseatedagainst the gaskets onthe wall sleeve . Sealspace betweenwail sleeveand building opening using non - hardeningcaulkingcompound . This seal must be water tight , CONDENSATEDRAIN Install the plastic drain tube ( furnished ) over the 5 / 8 " O . D . fitting weldedto the condensatepan . Connectotherend of the drain tubetotrapped drain line ( See Figure 2 ) . Theplastic drain connectionto thechassisbaseis provided so that it may be disconnected from the permanent drain tubingin the baseof unit in the event it becomesnecessaryto remove the chassis assembly . The drain line shouldpitch gradually downward at least 1 " per 10 loot of horizontal run to the open drain . Be certainthat the plaslic drain tubing has free drainage and is not crimpedor flattened at any bend ,
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PAGE4 OF 10 NEW [ I PART . OI . " ( 94009 [ 4 DArEI 4 - _ 5 - 9I ' SUPERSEDES FIGURE1 INSTRUCTIONFORSUPPORTINGPWCUNITS WallSleeve 7 x 22 Mio . OpeningTo Align with Return Air Opening _ n Unit . ] L _ VibrationisolatingMaterial % FIGURE2 5 / 8 " I . D . PLASTIC ( FURNISHED ) CHASSISDRAIN ( FURNISHED ) 5 / 8 " I . D . PLASTIC TUBE ( FURNISHED ) 518 " O . O . DRAIN " - UNE AND TRAP \ \ \ ( INSTALLERSUPPLIED ) \ RETURN NR DUCT
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PA , TNIO 4tt94OOI BD4A EI 41594 ] SUPERSEI DENSEWI PAGE OFtO LIMITATIONS The unit shouldbe installedin accordance with all national and localsafetycodes . Limitationsof the unit and appropriateaccessoriesmust alsobe observed . Theunit mustNOTbe installedwithany ductworkin the outdoor airstream . Theoutdoorfan is notdesignedto operate againstany additionalstatic pressure . Minimum and maximum , operatingconditionsmust be observed to assure maximumsystem performancewith minimum servicerequired . TABLE1 - APPLICATIONLIMITATIONS OUTDOORAMBIENTAIR TEMP . OF INDOORAMBIENTTEMP . OF MIN . OB " COOL MAX . OB MIN . MAX . 65 COOL HEAT DB / WB DB DB / WB DB 125 75 COOL HEAT COOL HEAT 62 / 57 50 90 / 72 80 DUCTWORK Ductworkshouldbe designed _ lndsized accordingto applicablemethodsfrom the Air Conditioning Contractors of America ( ACCA ) . It is recommendedthat supplyand return duct connectionsat the unit be madewith flexible joints . The supptyandreturn air ductsystemsshouldbedesignedfor the CFM staticrequirementsof the job . Theyshould NOTbe sized to match the dimensionsof the ductconnectionsonthe unit , NOTE : SUPPLYDUCTFLANGESARESHIPPEDFLATANDMUSTBEBENTUPBEFOREATTACHINGTHESUPPLYDUCT . Toconnectthe returnducttothe unit . usea straightpieceof duct 22 " wideby 7 " deep . Insert the ductintothe return openinginthe bottomof the unit . Flangethe ductovertheexistingflanges aroundtheopeninginsideunit . Make sure that allsidesof the ductare flangedovertopermitremovalof coolingchassisif required . Usea flexible connectionto attachremainderof returnduct . Thereturnductshouldbe sealedtothe unit casingandterminateoutsidethespace containingthe furnace . NOTE : THE RETURNDUCTMUST ALLOWFORTHE UNIT DRAINPANCONNECTIONSAND DRAINTUBE . CAUTION : DONOTSCREWINTO THE SIDEOF THEDRAINPAN . AIR FILTER All indoor return airmust be filtered . A permanent - typefilter is furnished withthe unit , locateddirectly behindtheac - cess panel . Removingthe panel permits access to the filter . Thefiltershouldbe cleanedat leastthreetimesduring eachof the heating andcoolingseasons , or more frequently if unusual conditionsare encountered . To clean the permanent filter , shake filter to removeexcessdirt and / or use vacuum cleaner . Wash filter in soap or detergent water and replace after filter is dry . The filter supplied neednot be oiled after washing . .
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PARTNO . ] 41194D094 ] DATE ] 4 - 15 - 94 ] SUPERSEDES ] NEW ] PAGE6 OF 10 If an installation is madein which it is more desirable tomount the filter exterior tothe unit , in the return duct work , or otherwise , either the permanent filter suppliedor a disposable filter may be used . If a disposable filter is used , the minimum area required is as follows : MODELNO , FILTERAREA ( MIN . ) PWC182 480 sq . in , PWC242 480 sq . in . PWC302 480 sq . in . THERMOSTAT The room thermostatshouldbe locatedonan insidewallwhereit will not be subject todrafts , sun exposureor heat fromelectrical fixtures or appliances . Followthe manufacturer's instructions enclosedwith thethermostat for general installation procedures . Color codedinsulated wires ( # ! 8 AWG ) should be usedto connectthe thermostat to the unit . POWERAND CONTROLWIRING ELECTRICALCONNECTIONS ALL WIRINGSHOULDBEDONEIN ACCORDANCEWITH NATIONALELECTRICALCODE , ANSI / NFPA No . 70 ( LATEST EDITION ) . IN CANADACSA C22 . 2 Part 1 ( LATESTEDITION ) , OR WITH LOCALCODES , WHERETHEY PREVAIL : Usewiringwithatemperaturelimitationof 75 ° C rain . Runthe 208or 230 volt , 60 hertzelectric powersupplythrough a fused disconnectswitch to the controlboxof the unit andconnectas showninthe wiringdiagram located on the in - side of the control access panel . The unit must be electricallygrounded in accordancewithlocal codesor in the absenceof localcodeswith the Na - tional Electric CodeANSI / NFPA No . 70 ( latest edition ) or CSAC22 . 2 Part 1 ( latest edition ) . Power supplyto the unit must be N . E . C . Class1 , and must complywith all applicable codes . A fused disconnect switch should be field providedfor the unit . Theswitchmust be separatefrom all othercircuits . If any of the wire supplied with the unit must be replaced , replacement wire must be of the type shown onthe wiring diagram . Electricalwiring must be sized to minimumcircuitampacitymarked on the unit . USECOPPERCONDUCTORSONLY . Eachunit must be wired with a separatebranchcircuitand be properlyfused . SEQUENCEOF UNIT OPERATION COOLING - Whenthe thermostatis inthe coolingmode , the 0 circuitis poweredwhichenergizesthe reversing valve . Upon coolingdemand , the thermostat closescircuitR to YandG . ClosingR toY closesthe unit contactor , startingthe compressoar ndoutdoor fan . Thethermostatautomatically closesRto Gcircuitwhichalsobrings onthe indoor blower at the sametime . Uponsatisfying coolingdemand , the thermostat will openthe abovecircuitsand openthe main con - tactor , stoppingthe compressoar ndoutdoorfan . If the unit is equippedwith a time delay , the blower will coritinueto operate for 90 seconds which improves systemefficiency . HEATING - Upon heating demand the thermostatclosescircuitR to Y closingthe unit contactor , starting the com - pressor andoutdoor fan . Thereversing valveis . no . t - energizedin the heating mode . Thethermostatagainautomatical - ly brings on the indoorblower at the sametime . Thesecondstage of the thermostat closescircuftRto W closingthe unit sequencers , bring theauxiliary electric heaton . Upon satisfying heating demandthe thermostat opens abovecir - cuitsand stops unit operation . DEFROSTCYCLE - if outdoor ambient conditions are such that frost forms on the outdoorcoil , the defrost control monitors the need for andinitiatesandterminates defrost cycles as neccessary to maintain system performance . The defrost controlis time / temperature initiated and temperatureterminatedwith a maximum defrost time ( time - out ) of 10 minutes . Time betweendefrost cycles is pre - set at 60 minute intervals at the factory , but can be field adjusted to 30 , 80 , or 90 minutes . Seeillustralion for field adjustment of defrost timing . For best performance in RegionIV , the PWC242defrost interval should be adjusted to 30 minutes . i
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PA , T , OI . , tt , , O ( 0 , , [ l SUPERSEIOENSEW l PAGE OFtO The defrost controlwill initiatea defrosl cycle if the time period has elapsedand the defrost sensor detects a temperature below freezfng . At the slart of the defrost cycle , Ihe defrost ControlwUIenergize the reversing valve solenoid , shift ( ng the reversing valve and de - energizing the outdoor fan . The defrost reraywilt alsoclose , energizing auxiliary heat for increasedcomfortduring defrost . Theunit will remain in thedefrost mode until the defrost sensor has determined that lhe frost has been removedfrom the coil or a 10 minute time periodhas elapsed . FIGURE3 OEFROST TEST PINS OEFROST TIMEJUMPER T2 = 60 MINUTES T1 = 30 MINUTESS T3 = 90 MINUTE Thedefrost controlis alsoequippedwitha setof testpinsto aidintroubleshootingof thedefrost system . The follow - ing is a briefoutline of the testing of the defrost system . Thedefrostsensorwilt be closedat 32 ° F or below . If temperaturesare suchthat the switchis notclosed , jumper between the defrostsensorterminalson the defrostcontrol . Start the systemin heating operation . Jumper testpins . A 1 / 4 " quick connectterminalcrimpedonto a solidwireor brazing rod workswellfor testjumper . Closing test pins speedup time intervalby a factor of 256 . DEFROSTCONTROLSETTINGDEFROSTTESTCYCLETIME T1 - 30 minutes 7 seconds T2 - 60 minutes 14 seconds T3 - 90 minutes 21 seconds Afterclosingtest pinsand appropriatecycle timehas elapsed , the reversingvalveshouldshiftto defrostmodeand the outdoor fan should stop . Aftertwo secondsof defrostoperation , the reversing valveshouldshift back to heating operation and the outdoor fan shouldstart . SYSTEMPERFORMANCE For maximumperformanceof this heatpump system , the operatingtemperaturesand pressureshouldbe checked and superheat determined at Standard ARItestconditionsof 82 ° F outdoor - 80 ° F indoordry bulb / 67 ° F wet burb . If the superheatmeasureddeviates from thevalues in the tablebelow , the refrigerant charge shouldbe adjustedaccor - dingly for maximum performance . PWCSUCTIONSUPERHEAT - TABLE2 Outdoor Unit Model SuctionSuperheat @ A . R . I . Conditions PWC182 18 ° . 20OF PWC242 17 ° - 19 %
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PARTNI O4t _ g4DIOgD4AT ] E4iS - g , I SUPERSI EONEESWI RAGE8OF _ O [ MAINTENANCE NORMAL MAINTENANCE WARNING : PRIORTO ANY OF THE FOLLOWING MAINTENANCE PROCEDURESSHUT OFF ALL ELECTRICALPOWERTO THE UNIT . FAILTURETO DOSO COULDCAUSE PERSONALIN - JURY . Periodic inspectionand maintenancenormallyconsistsof changing or cleaningfilters and ( under someconditions ) cleaning the coils . FILTER - supplied . Inspectoncea month . Replacedisposableo , r clean permanenttypeas necessary . DONOTreplace permanenttype with disposable . MOTORS - indoorand outdoortan motors are permanentlylubricatedand requirenomaintenance . OUTDOORCOIL - Foreignmaterial shouldnot beallowedtoaccumulateonthe outdoor coilsurfaceor other parts inthe air circuit . Cleaningshould beas oftenas necessaryto keepthe coil clean . Usea brush , vacuum cleanerattachment , or other suitable means . If water is used to cleanthe coil , be sure power to the unit is shutoff prior to cleaning . NOTE : CARESHOULDBE USEDWHENCLEANINGTHE COILSSOTHATTHE COILFINS ARENOTDAMAGED . OUTDOORBASEDRAIN - Foreignmaterial should notbe allowedto clogthe drain hole . Inspect andclear'drain open - ing prior to heatingseason . PHYSICALAND ELECTRICALDATA 1 / 4 _ / 4
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I _ , , 9 _ DIo9O . A _ El . - _ 5 - lg _ SU _ E . SElOES . EW I , _ GEgOF , O llllll llllll ? AND 10 PVC 0NLY RED lira CAP . UOI'CR VZOI . [ T > ( HIGH _ EE EV . OV _ Rm RE9 8L _ X CmTm U m . L0W C / P / Z : IT _ - RIJ _ eTI O / V / I . VE © B . UE im _ E ) " / _ ( ) s'r CONNECTION DIAGRAM
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I PAGE10 OF 10 1PA ' _ RT N0 . I 411941 ) 094 I DATE I 4 - 15 - 94 I SUPERSEDES I NEW 3Ct / ' ZsO - t - 60 SUPPLTWI ? H ¥ [ N . 11.10 _ 6 ? AT NO " _ j 75 ' € € _ WIIaE _ LINK ; tOLTAE _ ' II _ O F AWlG _ THE CtqXOINAL CX _ Z : _ zT t i _ cz _ qcuzT 2 ) - - - - Lof vo . T _ 4 [ _ IrlRl _ _ _ T14 £ SAUESIZE A _ P TYPEWIRE i _ T 0 £ USf _ , BUJE IIIIII IIIIII VXa . k'T HZOH mAC = I € _ rxcTOR aU _ a _ Yn . LOW I ' flg . LOw CAPAlCTIOR - RUN V _ = lJu _ © Ot . UE , . ) NNECT I ON DIAGRAM I
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PWC Part No . 30790F08g Date 6 - 1 - 69 SELF CONTAINED Supersedes 30790G082 Page _ of 12 THRU - THE - WALL HEAT PUMP , ! Installation and Maintenance Instructions _ O , MSTP _ ,
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Part N _ 30790F089 Date . 6 - 1 - 89 $ upereedes 30790G082 Page2 _ _ 2 _ _ of 12 FORWARD This is a self - contained heat pump designed for Installation through an exterior wall . The unit is Underwriters ' Laboratories listed under heat pumps and is in compliance with Underwriters Standard , UL 559 . The unit is also certified to the Air Conditioning and Refrigeration Institute as complying to ARI Standard 240 . To simplify the proper Installation and to assure that the unit will operate tn conformity with general ac - cepted safety regulations , you should read carefully the instructions outlined In this manual . Failure to comply with the Installation Instructions , Operating Instructions or Maintenance Instructions , or Alterations of internal widng or parts not specifically outlined within this manual will void the Agency Listing's and Manufacturer's limited warranty . KEEP THIS MANUAL IN A SAFE PLACE FOR READY REFERENCE .
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PartNo . 307SOF089 Date 6 - 1 - 89 Supersedes 30790G082 Page _ of 12 INTRODUCTION This manual is intended to familiarize the installer , serviceman , and the user with the installation , operation and maintenance of this thru - the - wall heat pump . This unit is shipped from the factory in one package completely assemblied and wired . A specially designed trap assembly is shipped , secured to the air return area in lower front of unit . Check the rating plate to confirm heating and cooling capacities are as ordered and are as shown on the packaging label . When this unit is unpacked , a check should be made for any damage . If any damages are discovered , DO NOT INSTALL THE UNIT . Notify the transportation company and make proper notation on the carders freiaht bill . Damage claims must be filed with the carrier at once . The manufacturer can assume no responsibility for damages which Occur in transit or for improper Opera - tion of the unit as a result of shipping damages .
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Part No . 30 ? 90F089 Date 6 - 149 Supersedes 30790G082 , , Page _ of 12 TABLE OF CONTENTS " Page INSTALLATION Site Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Condensate and Defrost Drain . . . . . . . . . . . . . . . . . 6 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . 7 - 8 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Air Filter . . . . . . . . . ; . . . . . . . . . . . . . . . . . . . . . . 9 Duct Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Unit Checkout Procedure . . . . . . . . . . . . . . . . . . . . . 10 OPERATION INSTRUCTIONS Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 11 System Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . 11 MAINTENANCE AND SERVICE Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Chassis Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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Part No . 307g0F089 Date . 6 - 1 - 89 Supersedes 30790G082 Page _ of 12 INSTALLATION Site Preparation Tills unit is approved for thru - the . wall installation , with zero clearance to combustible material . The unit must be installed within a conditioned space to prevent freezing of defrost water in trap assembly and to avoid jacket heat loss and surface condensation problem . This unit must be installed with the wall sleeve specified for this unit . Refer to the manufacture's specifica - tion sheet for complete information and demensions . Assemble the wall sleeve in accordance with the instructions furnished with each wall sleeve . Install the wall sleeve level and square in all comers . It is to extend a minimum of 114 " to 3 / 8 " maximum beyond finished wall to permit caulking all around the sleeve without blocking drain holes at bottom front of sleeve . Before installing unit , Inspect wall sleeve . Make sure the gaskets located on the inside of the outer flanges are firmly attached to the sleeve and are not damaged . Damage or loose gaskets must be repaired before installing unit . The sleeve is not intended as the sole support for the thru - the - wail unit . An additional support must be pro - vided beneath the front of the unit for adequate support , The use of vibration insulation matedai between the unit and the support is recommended . See Figure 1 . Wall Sleeve • Seal space between wall sleeve and building opening using non - hardening caulking com - pound . The seal must be water tight + g " x 22 " rain . opening to align with return air opening in unit . Hole for drain . Ddll hole on left or dgtht side • through base after unit is installed . Celotex , or equivalent Plywood FIGURE 1 .
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Part No . 30790F089 Date 6 - 1 - 89 Supersedes 30790G082 Page _ of 12 INSTALLATION Before sliding unit into sleeve , remove 5 screws and washers from top panel . Slide unit into sleeve until the angle on top of the unit lines up with the top flange of the sleeve , and should almost touch . Fasten unit to sleeve with the 5 screws and washers above . Condensate and Defrost Drain The condensate drain trap furnished with the unit is a copper tube assembly and is furnished with three pieces of plastic tubing . To install condensate drain ( Reference Figure 2 . ) , connect one of the plastic tube ends over the 5 / 8 " O . D . fitting welded to the center of indoor condensate drain pan and another end to . the 5 / 8 " O . D . fitting on the chassis base . Connect the third plastic tube end to the open drain trap , The drain line should pitch gradually downward at least 1 inch per foot of horizontal run to open drain trap . Be certain that plastic drain tube has free drainage and Is not cdmpad or flattened at any bend . Test drainage by pouring water into drain pan under indoor coil and see that It Is removed rapidly through the drain tubing . The plastic drain connection Is provided so that tt may be disconnected from the permanent drain tubing in the building without unsoldering tn the event It becomes nceccesaary to remove the refrigeration drawer assembly . TOTAL DEFROST DRAIN SYSTEM MUST BE LOCATED IN THE CONDITIONED AREA TO AVOID FREEZING . Drain line must not be above lowest drain FIGURE 2 . pan fitting . Indoor coil Drain pan i , ii _ II • Chassis base I I r - w Use hole provided | on either side of base to exit unit . Retum air 5 / 8 " rain . O . D . copper duct ( if used ) or alum . drain tube ( shaded Item . Pitch 1 In . per ft . Installer supplied ) Open drain trap Alternate in conditioned route through space to prevent return air duct . freezing and damage . One 5 / 8 " O . D . copper trap & plastic tubes ( 3 ) ( furnished ) /
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PanNo . 307g0F089 Date 6 - 1 _ 9 Supemedes 30790G082 Page T of 12 INSTALLATION Electrical Connections All wiring to unit must comply with the national Electrical Code NFPA No . 70 or local codes , where they prevail . ANY ALTERNATION OF INTERNAL WIRING CAN VOID UNDERWRITER'S APPROVAL , ARI CER - TIFICATION AND MANUFACTURE'S LIMITED WARRANTY . The series and rating plates indicate the operating voltages , phase , ampacities and maximum fuse size and electric heater ratings . Units must never be installed where voltage exceeds 110 % of higher voltage indicated on rating plate , or less than the minimum operating voltage on rating plate , Ratings and BTU output are based on 230 V , 60 HZ supply . Voltages other than this rated voltage will alter the BTU output of this unit . For specific ratings at voltages or frequencies other than that designated con - tact your distributor or the manufacture . FAILURE OF THE COMPRESSOR AS A RESULT OF OPERATION ON IMPROPER VOLTAGE VOIDS THE COMPRESSOR REPLACEMENT WARRANTY . Multiple power supply connections must be used when total unit amp draw Is over 48 amps . If multiple power supply connections are used , separate fused disconnects must be Installed for each circuit between the main panel and the supply terminals In the unit . Circuit No . 1 , terminals L1 and L2 on the terminal block Is always used to supply power to the heat pump section . See Figure 3 , 4 , and 5 . Circuit No . 2 , terminals L3 and L4 on terminal block ( units up to 11.0 KW ) or fuse block ( units over 11.0 is always used to supply power to electdc heaters . Single entry supply may be used on units , when total amp draw , ( heat pump plus heaters ) Is less then 48 amps , and is not In violation of prevailing electrical codes . Units with 7.2 KW heaters or less are supplied with Internal jumpers between 1.1 & 1.3 , and L2 & L4 for single entry supply . Remove jumpers between L1 & I . . 3 and 1.2 & L4 when multiple entry supply is to be used . Fuse and wire sizing must be in accordance with prevailing electrical codes . See Product Specification sheets or Unit Sedes and Rating Plate for ampacities end maximum fuse .
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Date 6 - 1 - 89 Part No . 30790F089 Page _ of 12 Supersedes 30790G082 208 - 230 voit 1 Ph . power supply III [ ] FIGURE 3 . SINGLE ENTRY SUPPLY Remove internal for multiple entry Supply . PWC18E4 . 8 , PWGI8E7 . 2 PWC24E4 . 8 , PWC24E7 . 2 208.230V 208 - 230V 1 Ph power supply 1 Ph . power supply Circuit r I Circuit t - _ Circuit I " _ ICircuit No . 2 ! No . 1 I NoI . No2 . I I I I I I FIGURE 5 . FIGURE 4 , MULTIPLE ENTRY MULTIPLE ENTRY SUPPLY SUPPLY PWC18E14 . 7 PWC18E9 . 2 , PWC18E10 . 7 PWC24E14 . 7 PWC24Eg . 2 , PVVC24ElO . 7
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Part No . 30790F089 Date 6 - 1 - 89 Supersedes 30790G082 Page _ of 12 Thermostat This unit requires special thermostat for operation . See product specification sheets or label on unit for manufacture's part number . Install the thermostat according to directions furnished with It . Select a loca - tion in a room having the most wall or window area exposed to the outsid _ Locate on an inside wall , away from drafts , sunlight or any heat producing appliances . Connect thermostat wires to pigtail leads on unit with wire nuts following wire diagrams attached to unit . Air Filter This unit is supplied with a permanent type high filtration filter , located in front of the indoor coil . If an In - tallation is made in which it Is more desirable to mount the filter extedor to the unit In the return duct , the permanent filter supplied can be used or a disposable filter may be used . If a different filter or filters are used the minimum total filter area required is 375 eq . in . of nominal 112inch thick media , if a remote filter is Installed , the permanent filter supplied with this unit must be removed . Duct Work Provide duct work sufficiently large enough to handle the air volume at the total external static pressure not exceeding the rating of the unit published in the Product Specification sheet for the rated cooling air volume . Connect supply duct to top of unit using canvas connections or other flexible connection to prevent sound transmission Into the duct system . To connect the return duct to the unit , use e straight piece of duct 21 _ " by 9 " . Insert duct into return opening in bottom of unit and flange duct over existing flanges around opening In - side unit . Make sure that all sides of the duct are flanged over to permit removal of cooling chassis If re - quired . Use a flexible connection to attach remainder of return air duct . Adjustments No adjustments are required or should be attempted regarding any of the components of the heat pump chassis and supplementary electdc heaters . The unit should be checked to see that none of the wiring is loose or missing . The plug - in electrical connec . tors between the cooling chassis and the main control compartment should be checked to make sure the plugs are firmly seated and none of the wires are loose .
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Part No . 30790F089 Date 6 - 1 - 89 Supersedes 30790G082 Page 10 of 12 INSTALLATION A . Unit Check - Out Procedure - IMPORTANT indoor coil , 1 . Filter ( s ) must be clean and in place as to filter all air passing over 2 . Set thermostat to " OFF " position . 3 . Check that correct size fuses are installed for unit . 4 . All panels must be in place . 5 . Turn on main power to unit . B . Heating Check 1 . Set fan switch to " AUTO " . 2 . Set thermostat lever to lowest temperatuf'e . 3 . Set thermostat switch to " HEAT " position ( if indoor ambient temperature is near or colder than thermostat setting , heat pump will start immediately ) . 4 . Slowly adjust thermostat to warmer temperature until first stage heat is activated ( com - pressor will start ) . 5 . If'possible , check outdoor fan to make sure it's rotating ( this is especially important If heat pump has been installed for sometime and not running in the winter such that the outdoor fan plenum could be clogged with snow or ice build - up ) . 6 . Check indoor air outlet to verify indoor fan is blowing air and getting warmer . 7 . Adjust thermostat lever to at least 5 " F warmer temperature So that second stage heat will activate . 8 . Check indoor air outlet for increased heating ( higher temperature ) . C . Cooling Check 1 . Set thermostat switch , to " OFF " position for minimum of 5 minutes to allow heat pump pressures to equalize . 2 . Set thermostat lever to lowest temperature for cooling 3 . Set thermostat switch to " COOl . " position ( compressor should start unless indoor ambient is near or colder than thermostat setting ) . D . Blower Operation 1 . Set thermostat switch to " OFF " position . 2 . Set fan switch to " ON " . Indoor fan only will operate . 3 . Return fan switch to " AUTO " . Indoor fan will stop .
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Part No . 30790F089 Date . 6 - 1 - 89 Supersedes 30790G082 Page 11 of 12 OPERATION INSTRUCTIONS The following instructions are to be followed to obtain years of trouble free operation of your year - around comfort system . To start unit turn on main power ( may have two disconnect switches ) . If the outdoor temperature is below indoor temperature , the main power should be turned on 24 hours before starting unit in order to assure no liquid refrigerant is in the compressor crankcase , and to prevent valve damage of compressor . Operation of this unit is automatic and will provide heating or cooling depending on the setting of the thermostat . Heating Operation 1 . Set thermostat system switch to " HEAT ; ' , 2 . Set thermostat lever to desired temperature . 3 . Set fan switch to " ON " for continuous indoor blower operation or to " AUTO " for indoor blower to cycle corresponding with thermostat cycling . Cooling Operation 1 . Set thermostat system switch to " COOU ' . 2 . Set thermostat lever to desired temperature . 3 . Set fan switch to " ON " for continuous indoor blower operation or to " AUTO " for indoor blower to cycle corresponding with thermostat cycling , System Shutdown 1 . For temporary or short periods of shut . down , set thermostat system to ' OFF " and fan switch to " AUTO " . 2 . For a prolonged period of shut - down , set thermostat system switch to " OFF " and fan switch to " AUTO " . Tum off electdc power supply . ( Two disconnect switches may supply unit . )
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Part No . 30790F089 Date , 6 - 1o89 Supersedes 30790G082 Page 11 of 12 OPERATION INSTRUCTIONS The following instructions are to be followed to obtain years of trouble free operation of your year - around comfort system . To start unit turn on main power ( may have two disconnect switches ) . If the outdoor temperature is below indoor temperature , the main power should be turned on 24 hours before starting unit in order to assure no liquid refrigerant is in the compressor crankcase , and to prevent valve damage of compressor . Operation of this unit is automatic and will provide heating or cooling depending on the setting of the thermostat . Heating Operation 1 . Set thermostat system switch to " HEAT " . 2 . Set thermostat lever to desired temperature . 3 . Set fan switch to " ON " for continuous indoor blower operation or to " AUTO " for indoor blower to cycle corresponding with thermostat cycling . Cooling Operation 1 . Set thermostat system switch to " ( _ OOU ' . 2 . Set thermostat lever to desired temperature . 3 . Set fan switch to " ON " for continuous indoor blower operation or to " AUTO " for indoor blower to cycle corresponding with thermostat cycling . System Shutdown 1 . For temporary or short periods of shut - down , set thermostat system to ' OFF " and fan switch to " AUTO " . 2 . For a prolonged period of shut - down , set thermostat system switch to " OFF " and fan switch to " AUTO " . Turn off electric power supply . ( Two disconnect switches may supply unit . )
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