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Summary of Contents for Bard WH243D
- Page 1 INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMP Model WH243D Bard Manufacturing Company Manual : 2100-441 Supersedes: Bryan, Ohio 43506 File: Volume III Tab 17 Since 1914..Moving ahead just as planned. Date: 10-23-03 © Copyright 2003...
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Page 2: Table Of Contents
CONTENTS Getting Other Informations and Publications Start Up Important Installer Note ......... 13 Wall Mount General Information Crankcase Heaters ..........13 Heat Pump Wall Mount Model Nomenclature ..2 Service Hints ............13 Shipping Damage ............ 2 Sequence of Operation .......... 13 General .............. -
Page 3: Getting Other Informations And Publications
Getting Other Information and Publications These publications can help you install the air FOR MORE INFORMATION, CONTACT conditioner or heat pump. You can usually find these at THESE PUBLISHERS: 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 WH 24 3 D A 08 X X X X X B MODEL NUMBER CONTROL MODULES Coil options X - Standard REVISIONS CAPACITY 1 - Phenolic Coated Evaporator COLOR OPTIONS 24 - 2 Ton VENTILATION OPTIONS 2 - Phenolic Coated Condenser... -
Page 5: Figure 1 Unit Dimensions
FIGURE 1 UNIT DIMENSIONS FRONT VIEW SIDE VIEW BACK VIEW MIS-1261... -
Page 6: Duct Work
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. These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. -
Page 7: Filters
Any grille that meets the 5/8 inch louver criteria may be maximum energy efficiency. used. It is recommended that Bard Return Air Grille Kit RG2 thru RG5 or RFG2 thru RFG5 be installed The blank-off plate is available upon request from the when no return duct is used. -
Page 8: Installation Instructions
INSTALLATION INSTRUCTIONS WIRING – MAIN POWER WALL MOUNTING INFORMATION Refer to the unit rating plate for wire sizing information 1. These units are secured by wall mounting brackets and maximum fuse or “HACR” type circuit breaker which secure the unit to the outside wall surface at size. -
Page 9: Figure 3 Mounting Instructions
FIGURE 3 MOUNTING INSTRUCTIONS MIS-353... -
Page 10: Figure 4 Wall Mounting Instructions
FIGURE 4 WALL MOUNTING INSTRUCTIONS SEE FIGURE 3 – MOUNTING INSTRUCTIONS MIS-548 FIGURE 5 WALL MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS MIS-549 Manual 2100-441 Page... -
Page 11: Figure 6 Common Wall Mounting Installations
FIGURE 6 COMMON WALL MOUNTING INSTALLATIONS MIS-550 Manual 2100-441 Page... - Page 12 FIGURE 7 WHXXXDX – HOT GAS REHEAT DURING DEHUMIDIFICATION WITH CS2000 ENERGY MONITOR FULL TIME DEHUMIDIFICATION IMPORTANT NOTE: Only the thermostat and subbase combinations as shown in Table 4 will work with this equipment. The thermostat and subbase must be matched, and the correct operation can be assured only be proper selection and application of these parts.
- Page 13 FIGURE 8 WHXXXDX – HOT GAS REHEAT DURING DEHUMIDIFICATION WITH PROGRAMMABLE THERMOSTAT FULL TIME DEHUMIDIFICATION IMPORTANT NOTE: Only the thermostat and subbase combinations as shown in Table 4 will work with this equipment. The thermostat and subbase must be matched, and the correct operation can be assured only be proper selection and application of these parts.
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Page 14: Wiring - Low Voltage Wiring
WIRING – LOW VOLTAGE WIRING LOW VOLTAGE CONNECTIONS 230 / 208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the DDC CONTROL factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable Fan Only Energize G operating voltage range for the 240 and 208V taps are:... -
Page 15: Figure 8 Hot Gas Reheat During Dehumidification With Programmable Thermostat
START UP IMPORTANT INSTALLER NOTE FIGURE 9 START UP LABEL For improved start up performance, wash the indoor coil with a dish detergent. IMPORTANT CRANKCASE HEATERS THESE PROCEDURES MUST BE WH243 units are provided with compressor crankcase FOLLOWED AT INITIAL START UP heat. -
Page 16: Pressure Service Ports
HEATING SEQUENCE – On a call for heating, the DEFROST CYCLE compressor and reversing valve of the unit are energized The defrost cycle is controlled by temperature and time to provide heat pump heating. If the room temperature on the solid state heat pump control. See Figure 10. falls below the 2nd stage heating set point backup electric heat is energized. -
Page 17: Figure 10 Defrost Control Board
Use a small screwdriver or other metallic object, or By placing a jumper across the SEN JMP terminals (a another 1/4 inch QC, to short between the SPEEDUP 1/4 inch QC terminal works best) the defrost sensor terminals to accelerate the HPC timer and initiate mounted on the outdoor coil is shunted out and will defrost. -
Page 18: Troubleshooting
TROUBLESHOOTING 3. Turn thermostat blower switch to “auto” position. SOLID STATE HEAT PUMP CONTROL Indoor blower should stop (after time delay). TROUBLESHOOTING PROCEDURE 4. Set system switch to “heat” or “cool”. Adjust 1. Turn on AC power supply to indoor and outdoor thermostat to call for heat or cool –... -
Page 19: Checking Temperature Sensor Outside Unit Circuit
CHECKING TEMPERATURE SENSOR 3. Check resistance reading to chart of resistance use ambient temperature. (Tolerance of part is ± 10%.) OUTSIDE UNIT CIRCUIT. 4. If sensor resistance reads very low, then sensor is 1. Disconnect temperature sensor from outdoor coil. shorted and will not allow proper operation of the 2. -
Page 20: Figure 11 Fan Blade Setting
FAN BLADE SETTING DIMENSIONS TABLE 7 SUCTION LINE TEMPERATURES Shown in the drawing below are the correct fan blade setting dimensions for proper air delivery across the (Temperatures °F) outdoor coil. f r i Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be check and blade adjusted in or out on the motor shaft accordingly. -
Page 21: Pressure Tables
TABLE 11 PRESSURE TABLE COOLING Air Temperature Entering Outdoor Coil °F Pressures in dehumidification mode will be slightly less than normal cooling mode. TABLE 12 PRESSURE TABLE HEATING Air Temperature Entering Outdoor Coil °F Low Side Pressure ± 2 PSIG High Side Pressure ±... -
Page 22: Optional Accessories
TABLE 13 OPTIONAL ACCESSORIES i t n t a l i t n t a l t i u t i u l l u Manual 2100-441 Page... -
Page 23: Table 14 Dehumidification Relay Logic Board
TABLE 14 DEHUMIDIFICATION RELAY LOGIC BOARD NOTES: Cooling takes precedence over dehumidification. A cooling call cancels dehumidification Dehumidification takes precedence over 1st stage heating. The first stage heating call is redirected from compressor heating to electric heat. 2nd stage heating cancels dehumidification. -
Page 24: Figure 12 Circuit Diagram H/P Cooling Mode
FIGURE 12 BARD MFG. HEAT PUMP COOLING MODE CIRCUIT DIAGRAM INDOOR COIL REHEAT COIL 4-WAY VALVE CHECK VALVE OUTDOOR COIL CAPILLARY DRAIN ASSY. 3-WAY VALVE COMPRESSOR MIS-1426 TXV (2 THRU 3 1/2 TON USE ORIFICE) FIGURE 13 BARD MFG. HEAT PUMP DEHUMIDIFICATION MODE...
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