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Summary of Contents for Bard WH423D
- Page 1 INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS MODELS: WH423D WH484D WH604D Bard Manufacturing Company, Inc. Manual : 2100-488 Supersedes: NEW Bryan, Ohio 43506 File: Volume III Tab 17 Since 1914...Moving ahead just as planned. Date: 01-04-08 Manual 2100-488 Page 1 of 26...
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Page 2: Table Of Contents
Contents Getting Other Informations and Publications Start Up For more information, contact these publishers: ..3 Important Installer Note ......... 17 Crankcase Heaters ..........17 Wall Mount General Information High Pressure Switch ..........17 Heat Pump Wall Mount Model Nomenclature ..4 Three Phase Scroll Compressor Start Up .... -
Page 3: Getting Other Informations And Publications
Getting Other Information and Publications For more information, contact these These publications can help you install the air conditioner or heat pump. You can usually find these at publishers: your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard. -
Page 4: Wall Mount General Information
WALL MOUNT GENERAL INFORMATION Heat Pump Wall Mount Model Nomenclature MODEL CONTROL REVISION NUMBER MODULES 00 – No KW 05 – 5 KW COIL OPTIONS VOLTS & PHASE CAPACITY 06 – 6 KW X – Standard A – 230/208/60-1 42 – 3½ Ton 09 –... -
Page 5: Figure 1 Unit Dimensions
Manual 2100-488 Page 5 of 26... -
Page 6: Table 2 Electrical Specifications
TABLE 2 ELECTRICAL SPECIFICATIONS & 1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. 2 Based on 75°C copper wire. All wiring must conform to NEC and all local codes. 3 Maximum KW that can operate with heat pump on. -
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 through RG-5 or RFG-2 through RFG-5 be Size of unit for a proposed installation should be based installed when 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 WARNING WALL MOUNTING INFORMATION 1. Two holes, for the supply and return air openings, must be cut through the wall as shown in Figure 3. Failure to provide the 1/4 inch clearance between the supply duct and a combustible 2. -
Page 10: Figure 3 Mounting Instructions
FIGURE 3 MOUNTING INSTRUCTIONS Seal with bead of Top flashing detail view DIMENSION CHART DIMENSION CHART caulking along entire length of top. Attach supplied DIM. "A" DIM. "B" DIM. "C" DIM. "D" DIM. "E" DIM. "A" DIM. "B" DIM. "C" DIM. "D" DIM. "E" rain flashing. -
Page 11: Figure 5 Wall Mounting Instructions
FIGURE 5 WALL-MOUNTING INSTRUCTIONS SEE FIGURE 3 — MOUNTING INSTRUCTIONS FIGURE 6 WALL-MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS SEE FIGURE 1 FOR DUCT DIMENSIONS Manual 2100-488 Page 11 of 26... -
Page 12: Figure 7 Common Wall Mounting Installations
FIGURE 7 COMMON WALL-MOUNTING INSTALLATIONS Manual 2100-488 Page 12 of 26... -
Page 13: Wiring - Main Power
LOW VOLTAGE CONNECTIONS WIRING — MAIN POWER Refer to the unit rating plate for wire sizing information and These units use a grounded 24 volt AC low voltage maximum fuse or “HACR” type circuit breaker size. Each circuit. outdoor unit is marked with a “Minimum Circuit Ampacity”. The “R”... -
Page 14: Figure 8 Hot Gas Reheat During Dehumidification With Cs2000A
FIGURE 8 WHXXXDX – HOT GAS REHEAT DURING DEHUMIDIFICATION WITH CS2000A ENERGY MONITOR FULL TIME DEHUMIDIFICATION Manual 2100-488 Page 14 of 26... -
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 IMPORTANT NOTE: Only the thermostats as shown in Table 4 will work with this equipment. The thermostats must be matched, and the correct operation can be assured only by proper selection and application of these parts. -
Page 16: Thermostat Indicators
TABLE 3 TABLE 4 THERMOSTAT WIRE SIZE WALL THERMOSTATS ; l o ; l o Temperature and Humidity Controller #8403-060, along with the Outdoor Sensor option Part #8403-061, can be used to: • Limit minimum outdoor temperature for cooling option. •... -
Page 17: Figure 10 Start Up Label
ALLOW 4 HOURS OR 60 MINUTES PER possible valve failure due to compressing a liquid. POUND OF REFRIGERANT IN THE SYSTEM The decal in Figure 10 is affixed to all WH423D units AS NOTED ON THE UNIT RATING PLATE, detailing start-up procedure. This is very important. -
Page 18: Phase Monitor
HEATING SEQUENCE – On a call for heating, the PHASE MONITOR compressor and reversing valve of the unit are All units with three phase scroll compressors are energized to provide heat pump heating. If the room equipped with a 3 phase line monitor to prevent temperature falls below the 2nd stage heating set point compressor damage due to phase reversal. -
Page 19: Figure 11 Defrost Control Board
Use a small screwdriver or other metallic object, or DEFROST CYCLE another 1/4 inch QC, to short between the SPEEDUP The defrost cycle is controlled by temperature and time terminals to accelerate the HPC timer and initiate on the solid state heat pump control. See Figure 11. defrost. -
Page 20: Troubleshooting
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL 3. Turn thermostat blower to “auto” position. Indoor blower should stop. NOTE: Many models have a TROUBLESHOOTING PROCEDURE 1-minute blower time delay on “off” command; 1. NOTE: A thorough understanding of the defrost wait for this to time-out. cycle sequence is essential. -
Page 21: 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 22: Figure 12 Fan Blade Setting
REFRIGERANT CHARGE FAN BLADE SETTING DIMENSIONS The correct system R-22 charge is shown on the unit Shown in the drawing in Figure 12 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 23: 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 24: 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. -
Page 25: Table 14 Dehumidification Relay Logic Board
Manual 2100-488 Page 25 of 26... -
Page 26: Cooling Mode
FIGURE 13 BARD HEAT PUMP COOLING MODE CIRCUIT DIAGRAM FIGURE 14 BARD HEAT PUMP DEHUMIDIFICATION MODE CIRCUIT DIAGRAM Manual 2100-488 Page 26 of 26...
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