Winchester WMA24-10 Instructions / Assembly
Contents
1. 01806 02006 amp 02506 Knock outs on the Air Handler electric heat mounting panel must be removed Refer to Figure 3 A CAUTION To prevent damage carefully pass the accessory heat ing element through the rectangular opening in the dis charge duct Element mounting plate must be secured with 4 screws REMOVE KNOCKOUTS FOR HEATER SIZES 4HK16501506 kW AND LARGER FIGURE 2 Heater Knockouts 4 Install electric heat accessory a Install Slide Rail from Heat Kit into control area of Air Handler Insert tab on rail into slot in Air Handler panel and attach to Air Handler front rail with screw Insure slide rail does not interfere with wiring run ning under the rail b Slide Heat Kit onto rail and install into Air Handler heater chute until heat element mounting plate is firmly seated against back panel on the air handler To allow additional access area during installations the contro board can be rotated By removing one screw at the base of the control board bracket the board bracket can then rotate around the screw remaining in the slotted base c Align holes and fasten the Heat Kit to the air handler unit with 4 screws 5 Connect the Heat Kit s 6 pin socket connector to the appropriate connector on the contro board The end ter minals are D shaped to ensure polarization of the con nector 6 Insure position of the contro board Heat Enable Jumper the Heat Enable Jumper must be in the HEAT p2. to this Accessory Heat Kit and installation of the Heat Kit should be done prior to unit installation This procedure should be performed on the heat kit before it is installed in the unit and before any field power wiring is applied or unit is placed in operation a Remove the 3 screws that attach the circuit breaker bracket to the heat kit b Rotate the circuit breaker s with bracket assembly 180 and re attach to the heat kit with the 3 screws removed previously c Apply 45 ft lb torque to all wiring connections d Verify all spade and plug wiring connections are secure e Verify that when kit is installed in unit for horizontal application circuit breaker handle s will be up when breaker is in the On position Proceed with standard installation above with steps 1 9 MO Unitary Products Group KIT SHOWN AFTER MODIFICATION FOR HORIZONTAL LEFT INSTALLATION UNIT WIRING ATTACHED TO THIS SIDE Do not need ta remove CIRCUIT BREAKERS May be 1 2 or 3 FIGURE 3 Modification for Horizontal Left Applications LINE POWER CONNECTIONS Power may be brought into the unit through the outlet air end of the unit top left when unit is vertical or the left side panel To minimize air leakage seal the field wiring entry point Field wiring connects to heat kits with circuit breaker or termi nal block A ground lug is also provided on the kits Connect the Air Handler power supply wiring le
3. 171053 UAI E 0307 ACCESSORY KIT INSTALLATION INSTRUCTIONS ELECTRIC HEATER ACCESSORY 4HK SERIES FOR USE WITH THE FOLLOWING AIR HANDLER MODELS AHP SHP AV SV MA MV GENERAL This instruction covers the physical installation of the follow ing electric heaters with AHP18 60 amp AV24 60 single piece air handlers and with MA24 60 amp MV24 60 modular air han e e a dlers Refer to unit instructions for electrical specifications ELECTRICAL SHOCK HAZARD These electric heat accessories are used for applications of installation or repairs made by unqualified persons can cooling with electric heat and heat pump with electric heat result in hazards to you and others Installation must Each of the air handler unit models are approved for use with conform with local building codes or in the absence of specific electric heat accessories The Air Handler installation local codes with NAtional Electrical Code ANSI NFPA instructions or name plate list the possible combinations and 70 1996 or current edition other important electrical data and limitations The information contained in this manual is intended for TABLE 1 Models Covered use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments Shut OFF electric power at unit disconnect and or ser vice panel before beginning the following procedures Failure to carefully read and follow all instructions in this manual
4. ads to the leads supplied on the heat kit using wire nuts provided in the heat kit ELECTRIC HEATERS amp OPERATING CON TROLS The low voltage transformer and the fan heater control are standard on all models The air handlers are shipped pre wired to operate as cooling only applications To operate these units with electric heat it is necessary to field install an electric heater kit 4HK Prior to installing elec tric heat it is necessary to perform the following procedure 1 Verify position of heat enable jumper on the control board is in the Heat position when electric heat kit is installed nN Verify heat kit 6 socket plug is seated in control board 171053 UAI E 0307 FIELD SUPPLY WIRING WILL BE ATTACHED TO THIS SIDE REMOVE 3 SCREWS UNDERNEATH TO REMOVE BRACKET CIRCUIT BREAKERS AND RELAYS FROM HEAT KIT ROTATE UNIT AND RE ATTACH SAME 3 SCREWS LOW VOLTAGE CONTROL CONNECTIONS The 24 volt power supply is provided by an internally wired low voltage transformer which is standard on all air handler models Field supplied low voltage wiring can exit the unit on the top right hand corner or the right hand side panel Refer to Figure 1 Remove desired knockout and pierce foil faced insulation to allow wiring to pass through Use as small of a hole as possible to minimize air leakage Instali a 7 8 plastic bushing in the selected hole and keep low voltage wiring as short as possible inside the contr
5. can result in malfunction property damage per sonal injury and or death Verify edges of foil faced insulation are not in contact with any exposed electrical connections 4HK06500206 4HK16500206 4HK06500506 4HK16500506 4HKO06500806 4HK16500806 4HK06501006 4HK16501006 4HK16501306 4HK16501 506 4HK165N1506 4HK16501806 4HK16502006 4HK16502506 4HK06501025 4HKO65N1525 4HK06501525 4HK06501825 AHK16501825 4HK16502525 3 REMOVE _ gt DUCT COVER D 4b SLIDE HEATER KIT ONTO RAIL AND INTO AIR HANDLER 6 FIELD SUPPLY WIRING 1 REMOVE GIRCUIT__y D THISSIDE g a WV RAS BREAKER PLATE 4a INSTALL HEATER KIT RAIL S2 o gt 4 7 APPLY BREAKER W A COVER TO PANEL BLOWER ACCESS 2 BLOWER ACCESS PANEL FIGURE 4 Heater Installation Unitary Products Group 171053 UAI E 0307 INSTALLATION Installation is the same for operating positions upflow down flow and horizontal right Refer to Figure 1 If unit is installed in any of these positions proceed to step number 2 Installa tion of the Heater Kit should be done prior to unit installation 1 If Heat Kit has circuit breakers remove circuit breaker panel from front of air handler unit Remove air handler blower access panel Remove duct cover from back panel of air handler con trol and wiring compartment NOTE To Install some 15kw and all 18 20 amp 25 kw heat kits Models 4HK165 01506
6. ol box To further minimize air leakage seal the wiring entry point at the outside of the unit The field wiring is to be connected at the screw terminals of the control board NOTE All wiring must comply with local and national electri cal code requirements Read and heed all unit caution labels NOTE Itis possible to vary the amount of electric heat turned on during the defrost cycle of a heat pump Standard wiring will only bring on the first stage of electric heat during defrost See Heat Output and Limit Connections amp Table 6 for addi tional information on heat during defrost cycle NOTE For blower speed connections electrical information and wiring diagrams see indoor unit installation instructions NOTE The electric heaters have a temperature limit control lf failure occurs this limit control must be replaced with a direct replacement Unitary Products Group o UPFLOW ven DOWNFLOW a Met UPFLOW HORIZONTAL LEFT FIGURE 4 Typical Installed Application NOTE Field modification of heat kit required prior to use in horizontal left application Subject to change without notice Printed in U S A 171053 UAI E 0307 Copyright by York International Corp 2007 All rights reserved Supersedes 171053 UA D 0107 Unitary 5005 f Norman Product York OK Group Drive 73069
7. osition 7 Connect the Air Handler power supply wiring leads to the leads supplied on the heat kit using wire nuts provided in the heat kit 8 For kits with circuit breakers cut blower access panel insulation along foil perforations behind the circuit breaker plate and remove to open the area for the cir cuit breakers to protrude through the front access panel and to provide clearance for circuit breakers and single point wiring entry kit Replacement non foil faced insula tion for the exposed front panel may then need to be added eed Sota en DESI SEL SBS ETN AUS AENA AEA E ae te aoe Verify edges of foil faced insulation are not in contact with any exposed electrical connections 9 For kits with circuit breaker installed apply circuit breaker cover to outside of air handler blower access door Clean area around hole in panel prior to applying cover seal 10 Mark an X in the appropriate box on the indoor unit data plate for the particular heater installed NOTE All wiring must comply with loca and national electri cal code requirements Read and heed all unit caution labels For Horizontal Left lf the Air Handler unit is to be operated in a horizontal left hand application refer to Figure 4 and has a Heat Kit with circuit breakers perform steps below to insure circuit breaker handles wil be in the up position when On after installation Refer to Air Handler Installation Instructions Modifications
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