Bard WH421 Installation Instructions Manual
Wall mounted package heat pumps
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- Installation instructions manual (29 pages)
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Table of Contents
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Summary of Contents for Bard WH421
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Page 1: Installation Instructions
INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS MODELS: WH421 WH483 WH602 Manual: 2100-399 BARD MANUFACTURING COMPANY Supersedes: Bryan, Ohio 43506 File: Volume III Tab 17 Since 1914...Moving ahead, just as planned. Date: 03-01-02 Copyright 2002... -
Page 2: Table Of Contents
CONTENTS Getting Other Information and Publications ..1 Start Up ..............14 For more information, contact these publishers: ..1 Important Installer Note .......... 14 High Pressure Switch ..........14 Wall Mount General Information ......2 Three Phase Scroll Compressor Start Up Air Conditioner Wall Mount Model Nomenclature .. -
Page 3: Getting Other Information 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 MODEL NUMBER CONTROL MODULES (See Chart Below) 1 – 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
FIGURE 1 UNIT DIMENSIONS MIS-411... -
Page 6: Table 1 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 is made. See Page 1 for information on codes and be used. It is recommended that Bard Return Air Grille standards. Kit RG-2 thru RG-5 or RFG-2 thru RFG-5 be installed Size of unit for a proposed installation should be based 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 1/4 inch clearance strong and rigid enough to carry the weight of the between the supply duct and a combustible unit without transmitting any unit vibration. -
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 3A ELECTRIC HEAT CLEARANCE WARNING • A minimum of 1/4 inch clearance must be maintained between the supply air duct and combustible materials. -
Page 11: 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 SEE FIGURE 1 FOR DUCT DIMENSIONS MIS-549 Manual 2100-399 Page... -
Page 12: Figure 6 Common Wall-Mounting Instructions
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS MIS-550 Manual 2100-399 Page... -
Page 13: Wiring - Main Power
NOTE:The voltage should be measured at the field power WIRING — MAIN POWER connection point in the unit and while the unit is Refer to the unit rating plate for wire sizing operating at full load (maximum amperage information and maximum fuse or “HACR" type operating condition). -
Page 14: Thermostat Wiring
TABLE 3 Outdoor thermostats are available to hold off various banks of electric heat until needed as determined by THERMOSTAT WIRE SIZE outdoor temperature. The set point of either type of thermostat is variable with geographic region and sizing of the heating equipment to the structure Utilization of the Heating Application Data and the heat loss calculation of the building are useful in determining the correct set points. -
Page 15: Thermostat Indicator Lamps
TABLE 4 WALL THERMOSTAT AND SUBBASE COMBINATIONS ; l o ; l o ; l o ; l o ; l o (1) No automatic changeover position -- must be manually placed in heat or cool. Reversing valve remains energized at all times system switch is in heat position (except during defrost cycle). -
Page 16: Figure 9 Start-Up Label
START UP FIGURE 9 IMPORTANT INSTALLER NOTE START UP LABEL For improved start-up performance, wash the indoor coil with a dishwashing detergent. IMPORTANT THESE PROCEDURES MUST BE CRANKCASE HEATERS FOLLOWED AT INITIAL START UP AND AT ANY TIME POWER HAS WA421 units are provided with compressor crankcase BEEN REMOVED FOR 12 HOURS heat. -
Page 17: 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 compressors are equipped valve solenoid constantly whenever the system switch with a 3 phase line monitor to prevent compressor on subbase is placed in "Heat"... -
Page 18: Figure 10 Defrost Control Board
As soon as the defrost cycle kicks in, remove the There are three time settings on the HPC — 30, 60 or shorting instrument from the SPEEDUP terminals. on minutes. These are elapsed run-time values, and the Otherwise the timing will remain accelerated and run outdoor coil temperature sensor must be below the 30 through the 10-minute maximum defrost length degree equivalent resistance value for the timer to... -
Page 19: Troubleshooting
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL 4. Set system to heat or cool. Adjust thermostat to call TROUBLESHOOTING PROCEDURE for heat or cool – the indoor blower, compressor, and outdoor fan should start. 1. Turn on AC power supply to indoor and outdoor units. -
Page 20: Checking Temperature Sensor Outdoor Unit Circuit
CHECKING TEMPERATURE SENSOR 3. Check resistance reading to chart of resistance. Use 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 11 Fan Blade Setting
FAN BLADE SETTING DIMENSIONS REFRIGERANT CHARGE Shown in the drawing in Figure 11 are the correct fan The correct system R-22 charge is shown on the unit 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 unites equipped with STD 1 inch throwaway filter on 1 inch washable filter. -
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.