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Bard WH483 manual

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Table of contents for the manual

  • Page 1

    W ALL MOUNTED P ACKAGE HEA T PUMPS MODELS: WH421 WH483 WH602 INST ALLA TION INSTRUCTIONS Manual: 2100-399 Supersedes: File: Volume III Tab 17 Date: 03-01-02 BARD MANUFACTURING COMPANY Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned. Copyright 2002[...]

  • Page 2

    CONTENTS i Getting Other Information and Publications .......... 1 For more information, contact these publishers: ...... 1 W all Mount General Information ............................. 2 Air Conditioner W all Mount Model Nomenclature ..... 2 Shipping Damage .................................................... 5 General ............................[...]

  • Page 3

    Manual 2100-399 Page 1 Getting Other Information and Publications Manufactured under the following U.S. patent numbers: 5,301,744; 5,002,116; 4,924,934; 4,875,520; 4,825,936; 4,432,409 Other patents pending. These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them di[...]

  • Page 4

    Manual 2100-399 Page 2 WALL MOUNT GENERAL INFORMA TION HEAT PUMP WALL MOUNT MODEL NOMENCLATURE WH 48 1 – A 1 0 X X X X X B TABLE 1 ELECTRIC HEAT TABLE s l e d o M W K A - 1 2 4 H W B - 1 2 4 H W B - 3 8 4 H W C - 1 2 4 H W A - 3 8 4 H W A - 2 0 6 H W B - 3 8 4 H W B - 2 0 6 H W C - 3 8 4 H W C - 2 0 6 H W 1 - 0 4 21 - 8 0 23 - 0 4 23 - 8 0 23 - 0[...]

  • Page 5

    Manual 2100-399 Page 3 FIGURE 1 UNIT DIMENSIONS MIS-411[...]

  • Page 6

    Manual 2100-399 Page 4 TABLE 2 ELECTRICAL SPECIFICATIONS l e d o M T I U C R I C E L G N I S T I U C R I C L A U D d e t a R s t l o V e s a h P & . o N d l e i F r e w o P . s t k C 4 m u m i n i M t i u c r i C y t i c a p m A 1 m u m i x a M l a n r e t x E r o e s u F t i u c r i C r e k a e r B 2 d l e i F r e w o P e r i W e z i S 2 d n u[...]

  • Page 7

    Manual 2100-399 Page 5 SHIPPING DAMAGE Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. GENERAL The equipment covered in this manual is to be installe[...]

  • Page 8

    Manual 2100-399 Page 6 FIGURE 2 BLOWER DAMPER ASSEMBLY MIS-938 CONDENSATE DRAIN A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented ty[...]

  • Page 9

    Manual 2100-399 Page 7 INST ALLA TION INSTRUCTIONS WALL MOUNTING INFORMATION 1. Two holes, for the supply and return air openings, must be cut through the wall as shown in Figure 3. 2. On wood-frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration. See Figures 4 and[...]

  • Page 10

    Manual 2100-399 Page 8 FIGURE 3 MOUNTING INSTRUCTIONS FIGURE 3A ELECTRIC HEAT CLEARANCE Side section view of supply air duct for wall mounted unit showing 1/4 inch clearance to combustible surfaces. MIS-277 MIS-796 NOTE: It is recommended that a bead of silicone caulking be placed behind the side mounting flanges and under the top flashing at the t[...]

  • Page 11

    Manual 2100-399 Page 9 FIGURE 4 WALL-MOUNTING INSTRUCTIONS FIGURE 5 WALL-MOUNTING INSTRUCTIONS MIS-548 MIS-549 SEE FIGURE 3 — MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS SEE FIGURE 1 FOR DUCT DIMENSIONS[...]

  • Page 12

    Manual 2100-399 Page 10 FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS MIS-550[...]

  • Page 13

    Manual 2100-399 Page 11 WIRING — MAIN POWER Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR" type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of[...]

  • Page 14

    Manual 2100-399 Page 12 THERMOSTAT WIRING COMPRESSOR CUTOFF THERMOSTAT AND OUTDOOR THERMOSTATS Heat pump compressor operation at outdoor temperatures below 0° F are neither desirable nor advantageous in terms of efficiency. Since most equipment at time of manufacture is not designated for any specific destination of the country and most of the equ[...]

  • Page 15

    Manual 2100-399 Page 13 IMPORTANT NOTE: Both thermostat and subbase combinations shown above in Groups A and B incorporate the following features: Man-Auto fan switch, Off-Heat-Cool-Em. Heat switch, and two (2) indicator lamps – one for emergency heat and one for compressor malfunction. (1) No automatic changeover position -- must be manually pla[...]

  • Page 16

    Manual 2100-399 Page 14 ST ART UP IMPORTANT INSTALLER NOTE For improved start-up performance, wash the indoor coil with a dishwashing detergent. CRANKCASE HEATERS WA421 units are provided with compressor crankcase heat. WH602 and WH483 units are not provided with crankcase heat. These units utilize scroll compressors which do not require crankcase [...]

  • Page 17

    Manual 2100-399 Page 15 now in operation. The second option has no "Auto" changeover position, but instead energizes the reversing valve solenoid constantly whenever the system switch on subbase is placed in "Heat" position, the "B" terminal being constantly energized from R. A Thermostat demand for heat completes r-Y [...]

  • Page 18

    Manual 2100-399 Page 16 FIGURE 10 DEFROST CONTROL BOARD As soon as the defrost cycle kicks in, remove the shorting instrument from the SPEEDUP terminals. Otherwise the timing will remain accelerated and run through the 10-minute maximum defrost length sequence in a matter of seconds and will automatically terminate the defrost sequence. There is an[...]

  • Page 19

    Manual 2100-399 Page 17 TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE 1. Turn on AC power supply to indoor and outdoor units. 2. Turn thermostat blower switch to fan "on" – the indoor blower should start. (If it doesn't, troubleshoot indoor unit and correct problem). 3. Turn thermostat blower switch to aut[...]

  • Page 20

    Manual 2100-399 Page 18 CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT 1. Disconnect temperature sensor from board and from outdoor coil. 2. Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open. 3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part [...]

  • Page 21

    Manual 2100-399 Page 19 FAN BLADE SETTING DIMENSIONS Shown in the drawing in Figure 11 are the correct fan blade setting dimensions for proper air delivery across the outdoor coil. Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor[...]

  • Page 22

    Manual 2100-399 Page 20 TABLE 10 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY V alues shown are for unites equipped with STD 1 inch throwaway filter on 1 inch washable filter . Derate ESP by .15 for 2 inch pleated filters. l e d o M W K d e e p S 1 2 4 H W3 8 4 H W2 0 6 H W d e e p S h g i Hd e e p S w o Ld e e p S h g i Hd e e p S w o Ld e e p S h [...]

  • Page 23

    Manual 2100-399 Page 21 TABLE 13 OPTIONAL ACCESSORIES Model Description TABLE 12 HEATING PRESSURES – (ALL TEMPERATURES °F) Low side pressure ± 2 psig High side pressure ± 5 psig T ables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be r[...]