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Summary of Contents for Bard WH421D Series
- Page 1 INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS MODELS: WH421D WH483D WH602D Bard Manufacturing Company, Inc. Manual : 2100-403A Supersedes: 2100-403 Bryan, Ohio 43506 File: Volume III Tab 17 Since 1914...Moving ahead just as planned. Date: 09-01-03...
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Page 2: Table Of Contents
Contents Getting Other Informations and Publications Start Up For more information, contact these publishers: ..1 Important Installer Note ......... 15 Crankcase Heaters ..........15 Wall Mount General Information High Pressure Switch ..........15 Heat Pump Wall Mount Model Nomenclature ..2 Three Phase Scroll Compressor Start Up .... -
Page 3: Getting Other Informations And Publications
Getting Other Information and Publications For more information, contact these publishers: These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them directly from the ACCA Air Conditioning Contractors of America publisher. -
Page 4: Wall Mount General Information
WALL MOUNT GENERAL INFORMATION Heat Pump Wall Mount Model Nomenclature MODEL NUMBER CONTROL MODULES (See Chart Below 3 D A CAPACITY COIL OPTIONS 42 – 3-1/2 Ton REVISION X – Standard 48 – 4 Ton 1 – Phenolic Coated Evaporator 60 –... -
Page 5: Figure 1 Unit Dimensions
Manual 2100-403 Page... -
Page 6: Table 2 Electrical Specifications
TABLE 2 ELECTRICAL SPECIFICATIONS & Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. Based on 75°C copper wire. All wiring must conform to NEC and all local codes. Maximum KW that can operate with heat pump on. These Minimum Circuit Ampacity"... -
Page 7: Shipping Damage
Any grille that meets the 5/8 inch louver criteria, may be standards. used. It is recommended that Bard Return Air Grille Kit RG-2 thru RG-5 or RFG-2 thru RFG-5 be installed when Size of unit for a proposed installation should be based no return duct is used. -
Page 8: Fresh Air Intake
FRESH AIR INTAKE The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper All units are built with fresh air inlet slots punched in shipped with each unit. the service panel. If the unit is equipped with the fresh air damper CONDENSATE DRAIN assembly, the assembly is shipped already attached to... -
Page 9: Installation Instructions
INSTALLATION INSTRUCTIONS WALL MOUNTING INFORMATION WARNING 1. Two holes, for the supply and return air openings, must be cut through the wall as shown in Figure 2. Failure to provide the 1/4 inch clearance 2. On wood-frame walls, the wall construction must be between the supply duct and a combustible strong and rigid enough to carry the weight of the unit surface for the first 3 feet of duct can result in... -
Page 10: Figure 3 Mounting Instructions
FIGURE 3 MOUNTING INSTRUCTIONS NOTE: It is recommended that a bead of silicone caulking be placed behind the side mounting flanges and under the top flashing at the time of installation. MIS-796 FIGURE 4 WARNING ELECTRIC HEAT CLEARANCE • A minimum of 1/4 inch clearance must be maintained between the supply air duct and combustible materials. -
Page 11: Figure 5 Wall Mounting Instructions
FIGURE 5 WALL-MOUNTING INSTRUCTIONS SEE FIGURE 3 — MOUNTING INSTRUCTIONS MIS-548 FIGURE 6 WALL-MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS SEE FIGURE 1 FOR DUCT DIMENSIONS MIS-549 Manual 2100-403 Page... -
Page 12: Figure 7 Common Wall Mounting Installations
FIGURE 7 COMMON WALL-MOUNTING INSTALLATIONS MIS-550 Manual 2100-403 Page... -
Page 13: Wiring - Main Power
WIRING — MAIN POWER Nine (9) wires should be run from thermostat subbase to the 24V terminal board in the unit. A nine conductor, 18 Refer to the unit rating plate for wire sizing gauge copper, color-coded thermostat cable is information and maximum fuse or “HACR"... -
Page 14: Figure 8 Hot Gas Reheat During Dehumidification With Cs200
FIGURE 8 WHXXXDX – HOT GAS REHEAT DURING DEHUMIDIFICATION WITH CS2000 ENERGY MONITOR FULL TIME DEHUMIDIFICATION AREA HVAC OCCUPIED 8403-032 NC C BARD CS2000 8403-038 HONEYWELL H600A H600A HUMIDITY CONTROLLER 8403-047 DEHUMIDISTAT VICONICS H200-10-21-10 8403-042 B W1 W2 HONEYWELL T8511G1070... -
Page 15: Figure 9 Hot Gas Reheat During Dehumidification With Programmable Thermostat
FIGURE 9 WHXXXDX – HOT GAS REHEAT DURING DEHUMIDIFICATION WITH PROGRAMMABLE THERMOSTAT FULL TIME DEHUMIDIFICATION 8403-038 HONEYWELL H600A H600A HUMIDITY CONTROLLER 8403-047 DEHUMIDISTAT VICONICS H200-10-21-10 8403-049 WHITE-RODGERS IF93-380 THERMOSTAT UNIT LOW VOLTAGE TERMINAL BLOCK FACTORY JUMPER MIS-1562A IMPORTANT NOTE: Only the thermostat and subbase combinations as shown in Table 4 will work with this equipment. -
Page 16: Thermostat Indicator Lamps
TABLE 3 THERMOSTAT WIRE SIZE TABLE 4 WALL THERMOSTATS ; l o ; l o THERMOSTAT INDICATOR LAMPS COMPRESSOR MALFUNCTION LIGHT The red lamp will come on if there is any problem that Actuation of the red lamp is accomplished by a relay prevents the compressor from running when it is output from the heat pump control board which is supposed to be. -
Page 17: Figure 10 Start Up Label
START UP IMPORTANT INSTALLER NOTE FIGURE 10 START UP LABEL For improved start-up performance, wash the indoor coil with a dishwashing detergent. IMPORTANT THESE PROCEDURES MUST BE FOL- CRANKCASE HEATERS LOWED AT INITIAL START UP AND AT ANY WH421 units are provided with compressor crankcase TIME POWER HAS BEEN REMOVED FOR heat. -
Page 18: Phase Monitor
PHASE MONITOR now in operation. The second option has no "Auto" changeover position, but instead energizes the reversing All units with three phase scroll compressors are valve solenoid constantly whenever the system switch equipped with a 3 phase line monitor to prevent on subbase is placed in "Heat"... -
Page 19: Pressure Service Ports
There is a cycle speed up jumper on the control. This OTHER CONTROL SEQUENCE can be used to reduce the time between defrost cycle Any time the indoor coil temperature falls below 32 operation without waiting for time to elapse. degrees the compressor will be de-energized until the Use a small screwdriver or other metallic object, or coil temperature rises above 57 degrees. -
Page 20: Figure 11 Defrost Control Board
FIGURE 11 DEFROST CONTROL BOARD Manual 2100-403 Page... -
Page 21: Troubleshooting
TROUBLESHOOTING 3. Turn thermostat blower switch to auto position. SOLID STATE HEAT PUMP CONTROL Indoor blower should stop. TROUBLESHOOTING PROCEDURE 4. Set system to heat or cool. Adjust thermostat to call 1. Turn on AC power supply to indoor and outdoor for heat or cool –... -
Page 22: Checking Temperature Sensor Outside Unit Circuit
CHECKING TEMPERATURE SENSOR 3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part is OUTSIDE UNIT CIRCUIT ± 10%.) 1. Disconnect temperature sensor from board and from 4. If sensor resistance reads very low, then sensor is outdoor coil. -
Page 23: Figure 12 Fan Blade Setting
FAN BLADE SETTING DIMENSIONS REFRIGERANT CHARGE The correct system R-22 charge is shown on the unit Shown in the drawing in Figure 11 are the correct fan rating plate. Optimum unit performance will occur with blade setting dimensions for proper air delivery across a refrigerant charge resulting in a suction line the outdoor coil. -
Page 24: Pressure Tables
TABLE 10 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY Values shown are for units equipped with standard 1 inch throwaway filter on 1 inch washable filter. Derate ESP by .15 for 2 inch pleated filters. TABLE 11 COOLING PRESSURE – (All temperatures °F) Low side pressure ±... -
Page 25: Optional Accessories
TABLE 12 HEATING PRESSURES – (ALL TEMPERATURES °F) Low side pressure ± 2 psig High side pressure ± 5 psig Tables 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 removed, system evacuated and recharged to serial plate instruction.
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