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Summary of Contents for Bard WH423
- Page 1 INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS Models: WH423 WH483 WH604 Bard Manufacturing Company, Inc. Manual: 2100-487 Bryan, Ohio 43506 Supersedes: File: Volume III Tab 17 Since 1914...Moving ahead, just as planned. Date: 01-04-08 Manual 2100-487 Page 1 of 23...
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Page 2: Table Of Contents
CONTENTS Getting Other Information and Publications Start Up For more information, contact these publishers: ..3 Important Installer Note ......... 16 Crankcase Heaters ..........16 Wall Mount General Information High Pressure Switch ..........16 Heat Pump Wall Mount Model Nomenclature ..4 Three Phase Scroll Compressor Start Up Shipping Damage ............ -
Page 3: Getting Other Information And Publications
Getting Other Information and Publications These publications can help you install the air FOR MORE INFORMATION, CONTACT THESE PUBLISHERS: conditioner or heat pump. You can usually find these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each ACCA Air Conditioning Contractors of America standard. -
Page 4: Wall Mount General Information
WALL MOUNT GENERAL INFORMATION HEAT PUMP WALL MOUNT MODEL NOMENCLATURE 1 – MODEL CONTROL MODULES REVISION NUMBER (See Spec. Sheet S3210) CAPACITY 42 – 3½ Ton COIL OPTIONS 48 – 4 Ton X – Standard 60 – 5 Ton 1 – Phenolic Coated Evaporator 2 –... -
Page 5: Figure 1 Unit Dimensions
Manual 2100-487 Page 5 of 23... -
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 made. See Page 3 for information on codes and used. It is recommended that Bard Return Air Grille Kit standards. 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 CONDENSATE DRAIN All units are built with fresh air inlet slots punched in A plastic drain hose extends from the drain pan at the the service panel. top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass If the unit is equipped with the fresh air damper through. -
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 3. 2. On wood-frame walls, the wall construction must be Failure to provide the ¼ inch clearance strong and rigid enough to carry the weight of the unit between the supply duct and a combustible without transmitting any unit vibration. -
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 4 Wall-Mounting Instructions
FIGURE 4 WALL-MOUNTING INSTRUCTIONS SEE FIGURE 3 — MOUNTING INSTRUCTIONS FIGURE 5 WALL-MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS SEE FIGURE 1 FOR DUCT DIMENSIONS Manual 2100-487 Page 11 of 23... -
Page 12: Figure 6 Common Wall-Mounting Instructions
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS Manual 2100-487 Page 12 of 23... -
Page 13: Wiring - Main Power
WIRING — MAIN POWER LOW VOLTAGE CONNECTIONS Refer to the unit rating plate for wire sizing information and These units use a grounded 24 volt AC low voltage circuit. maximum fuse or “HACR” type circuit breaker size. Each The “R” terminal is the hot terminal and the “C” outdoor unit is marked with a “Minimum Circuit terminal is grounded. -
Page 14: Optional Outdoor Thermostat Applications
TABLE 3 Temperature and Humidity Controller #8403-060, along with the Outdoor Sensor option Part #8403-061, can be THERMOSTAT WIRE SIZE used to: •Limit minimum outdoor temperature for cooling option. •Limit minimum outdoor temperature for heat pump option. •Inhibit electric heat operation for heat pumps above selected outdoor temperature. -
Page 15: Electric Heat Hold-Off
ELECTRIC HEAT HOLD-OFF This is done to maximize efficiency by utilizing the heat (SEE FIGURES 10 AND 11) pump to bring the conditioned space temperature up, rather than cycling on the electric heat due a second stage call for In other applications, it is desirable to disable the operation heat from the thermostat on start-up coming off a night set- of the electric heat until outdoor temperatures have reached back condition or someone increasing the thermostat set... -
Page 16: Figure 12 Start-Up Label
THE COMPRESSOR HEATER WHICH possible valve failure due to compressing a liquid. EVAPORATES THE LIQUID REFRIGERANT The decal in Figure 12 is affixed to all WH423 units IN THE CRANKCASE. detailing start-up procedure. This is very important. 3. ALLOW 4 HOURS OR 60 MINUTES PER Please read carefully. -
Page 17: Phase Monitor
PHASE MONITOR changeover position, but instead energizes the reversing valve solenoid constantly whenever the system switch All units with three phase scroll compressors are on subbase is placed in “Heat” position, the “B” equipped with a 3 phase line monitor to prevent terminal being constantly energized from R. -
Page 18: Figure 13 Defrost Control Board
There is a cycle speed up jumper on the control. This This can be used to check defrost operation of the unit can be used to reduce the time between defrost cycle without waiting for the outdoor ambient to fall into the operation without waiting for time to elapse. -
Page 19: Troubleshooting
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL 4. Set system switch to “heat” or “cool”. Adjust TROUBLESHOOTING PROCEDURE thermostat to call for heat or cool. The indoor blower, compressor and outdoor fan should start. 1. NOTE: A thorough understanding of the defrost NOTE: If there was no power to 24 volt transformer, cycle sequence is essential. -
Page 20: Checking Temperature Sensor Outdoor Unit Circuit
3. Check resistance reading to chart of resistance. Use CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT sensor ambient temperature. (Tolerance of part is ± 10%.) 1. Disconnect temperature sensor from board and from outdoor coil. 4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the 2. -
Page 21: Figure 14 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 14 are the correct fan blade setting dimensions for proper air delivery across rating plate. Optimum unit performance will occur with the outdoor coil. -
Page 22: Pressure Chart
TABLE 10 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY - - - - - - - - - - - - - - - - - - - - - - - - Values shown are for units equipped with STD 1 inch throwaway filter on 1 inch washable filter. Derate ESP by .15 for 2 inch pleated filters. -
Page 23: 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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