Instruction/ maintenance manual of the product WH421 Bard
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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.
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 .
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.
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 -.
Manual 2100-399 Page 3 FIGURE 1 UNIT DIMENSIONS MIS-411.
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 & .
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.
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.
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.
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.
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 DIMENSIO.
Manual 2100-399 Page 10 FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS MIS-550.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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 .
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.
An important point after buying a device Bard WH421 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bard WH421 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bard WH421 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bard WH421 you will learn all the available features of the product, as well as information on its operation. The information that you get Bard WH421 will certainly help you make a decision on the purchase.
If you already are a holder of Bard WH421, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bard WH421.
However, one of the most important roles played by the user manual is to help in solving problems with Bard WH421. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bard WH421 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
