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Summary of Contents for Bard WH241D
- Page 1 INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMP MODELS WH241D Bard Manufacturing Company, Inc. Manual : 2100-356 Bryan, Ohio 43506 File: Volume III Tab 17 Date: 10-01-99 Since 1914...Moving ahead, just as planned.
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Page 2: Table Of Contents
Contents Getting Other Informations and Publications ..1 Start Up ..............12 Important Installer Note ......... 12 Wall Mount General Information ......2 Crankcase Heaters ..........12 Heat Pump Wall Mount Model Nomenclature ..2 Service Hints ............12 Shipping Damage ............ 2 Sequence of Operation .......... -
Page 3: Getting Other Informations And Publications
Getting Other Information and Publications These publications can help you install the air conditioner or For more information, contact these heat pump. You can usually find these at your local library publishers: 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 WH 24 1 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
Manual 2100-356 Page... -
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 Sheets is based upon the fresh air blank-off plate in place used. It is recommended that Bard Return Air Grille Kit and is recommended for maximum energy efficiency. RG2 thru RG5 or RFG2 thru RFG5 be installed when no The blank-off plate is available upon request from the return duct is used. -
Page 8: Installation Instructions
INSTALLATION INSTRUCTIONS WALL MOUNTING INFORMATION 3. Mount bottom mounting bracket, if used. 1. These units are secured by wall mounting brackets 4. Hook top rain flashing under back bend of top. Top which secure the unit to the outside wall surface at both rain flashing is shipped secured to the right side of the sides. -
Page 9: Figure 3 Mounting Instructions
Manual 2100-356 Page... -
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 2100-356 Page... -
Page 11: Figure 6 Common Wall Mounting Installations
FIGURE 6 COMMON WALL MOUNTING INSTALLATIONS MIS-550 Manual 2100-356 Page... -
Page 12: Wiring - Main Power
WIRING – MAIN POWER no nuisance tripping due to the momentary high starting current of the compressor motor. Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each The disconnect access door on this unit may be locked to outdoor unit is marked with a “Minimum Circuit prevent unauthorized access to the disconnect. -
Page 13: Thermostat Indicator Lamps
THERMOSTAT INDICATOR LAMPS TABLE 3 The red lamp marked “Check” will come on if there is any THERMOSTAT WIRE SIZE problem that prevents the compressor from running when it is supposed to be. COMPRESSOR MALFUNCTION LIGHT Actuation of the red lamp is accomplished by a relay output from the heat pump control board which is factory installed. -
Page 14: Start Up
START UP FIGURE 8 IMPORTANT INSTALLER NOTE For improved start up performance, wash the indoor coil with a dish detergent. IMPORTANT CRANKCASE HEATERS THESE PROCEDURES MUST BE WH241 units are provided with compressor crankcase heat. FOLLOWED AT INITIAL START UP These models have an insertion well-type heater located in AND AT ANY TIME POWER HAS the lower section of the compressor housing. -
Page 15: Figure 8 Start Up Procedure Decal
PRESSURE SERVICE PORTS OCCUPIED MODE High and low pressure service ports are installed on all units – The ERV and indoor VENTILATION SEQUENCE so that the system operating pressures can be observed. blower will be continuously energized when the timer is Pressure curves can be found later in the manual covering energized. -
Page 16: Figure 9 Defrost Control Board
FIGURE 9 – DEFROST CONTROL BOARD MIS-1174 Manual 2100-356 Page... -
Page 17: 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. Turn on AC power supply to indoor and outdoor units. NOTE: If there was no power to 24 volt transformer, the 2. -
Page 18: Checking Temperature Sensor Outside Unit Circuit
CHECKING TEMPERATURE SENSOR 3. Check resistance reading to chart of resistance use OUTSIDE UNIT CIRCUIT. ambient temperature. (Tolerance of part is ± 10%.) 1. Disconnect temperature sensor from outdoor coil. 4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat 2. -
Page 19: Figure 10 Fan Blade Setting
TABLE 7 FAN BLADE SETTING DIMENSIONS (Temperatures °F) Shown in the drawing below are the correct fan blade setting dimensions for proper air delivery across the outdoor f r i coil. 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 The above suction line temperatures are based upon 80°... -
Page 20: Pressure Tables
TABLE 11 PRESSURE TABLE COOLING Air Temperature Entering Outdoor Coil °F Pressures in dehumidification mode will be slightly less than normal cooloing mode. TABLE 12 PRESSURE TABLE HEATING Air Temperature Entering Outdoor Coil °F Low Side Pressure ± 2 PSIG High Side Pressure ±... -
Page 21: 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 2100-356 Page... -
Page 22: Figure 11 Circuit Diagram H/P Cooling Mode
FIGURE 11 BARD MFG. HEAT PUMP COOLING MODE CIRCUIT DIAGRAM INDOOR COIL REHEAT COIL 4-WAY VALVE CHECK VALVE OUTDOOR COIL CAPILLARY DRAIN ASS’Y 3-WAY VALVE COMPRESSOR MIS-1426 TXV (2 THRU 3 1/2 TON USE ORIFICE) FIGURE 12 BARD MFG. HEAT PUMP DEHUMIDIFICATION MODE...
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