INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS Models: WH421 WH483 WH602 Bard Manufacturing Company, Inc. Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned.
CONTENTS Getting Other Information and Publications For more information, contact these publishers: ...... 3 Wall Mount General Information Heat Pump Wall Mount Model Nomenclature .......... Shipping Damage .................................................... General ............................................................... Duct Work ............................................................... Filters ............................................................... Fresh Air Intake .................
Getting Other Information and Publications These publications can help you install the air 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 standard. FOR MORE INFORMATION, CONTACT THESE PUBLISHERS: ACCA Air Conditioning Contractors of America 1712 New Hampshire Ave. N.W.
WALL MOUNT GENERAL INFORMATION HEAT PUMP WALL MOUNT MODEL NOMENCLATURE WH 48 MODEL NUMBER 1 – A 10 X X X X X CONTROL MODULES (See Spec.
FIGURE 1 UNIT DIMENSIONS Manual Page 2100-399D 5 of 23
TABLE 2 ELECTRICAL SPECIFICATIONS SINGLE CIRCUIT 4 Rated Volts & P h ase Model N o. Field Minimum Pow er Circuit Ckts. Ampacity 1 DUAL CIRCUIT 2 2 4 1 2 2 Maximum External F u se o r Ckt .
SHIPPING DAMAGE Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. GENERAL The equipment covered in this manual is to be installed by trained, experienced service and installation technicians. Refer to Table 10 for maximum static pressure available for duct design.
FRESH AIR INTAKE CONDENSATE DRAIN All units are built with fresh air inlet slots punched in the service panel. A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented type system to assure proper drainage.
INSTALLATION INSTRUCTIONS WALL MOUNTING INFORMATION 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 strong and rigid enough to carry the weight of the unit without transmitting any unit vibration. See Figures 4 and 5. WARNING Fire hazard can result if ¼ inch clearance to combustible materials for supply air duct is not maintained. See Figure 3.
FIGURE 3 MOUNTING INSTRUCTIONS DIMENSION CHART DIM. "A" DIM. "B" DIM. "C" DIM. "D" DIM. "E" Required dimensions to maintain 1/4" min. clearance from combustible materials 30 1/2" 10 1/2" 6 1/4" 1 1/4" 29 3/4" Required dimensions to maintain 1" clearance from combustible materials 32" 12" 5 1/2" 2" 29" DIM. "C" Seal with bead of caulking along entire length of top. Top flashing detail view Attach supplied rain flashing. Apply caulk between flashing and wall. Foam air seal Supply flange DIM.
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 Page 2100-399D 11 of 23
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS Manual 2100-399D Page 12 of 23
WIRING — MAIN POWER Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire.
TABLE 3 THERMOSTAT WIRE SIZE Transformer VA 55 FLA Wire Gauge Maximum Distance In Feet 2.3 20 gauge 18 gauge 16 gauge 14 gauge 12 gauge 45 60 100 160 250 OPTIONAL OUTDOOR THERMOSTAT APPLICATIONS Since most equipment at the time of manufacture is not designated for any specific destination of the country and are installed in areas not approaching the lower outdoor temperature range, outdoor thermostats are not factory installed as standard equipment, but are offered as an option.
ELECTRIC HEAT HOLD-OFF (SEE FIGURES 10 AND 11) In other applications, it is desirable to disable the operation of the electric heat until outdoor temperatures have reached a certain design point. This won't allow the electric heat to come on as second stage heating unless the outdoor temperature is below the set point of the outdoor thermostat.
START UP IMPORTANT INSTALLER NOTE For improved start-up performance, wash the indoor coil with a dishwashing detergent. CRANKCASE HEATERS WH421 units are provided with compressor crankcase heat. WH602 and WH483 units are not provided with crankcase heat. These units utilize scroll compressors which do not require crankcase heat in this application.
PHASE MONITOR All units with three phase compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal. The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct, the green LED will light. If phases are reversed, the red fault LED will be lit and compressor operation is inhibited. If a fault condition occurs, reverse two of the supply leads to the unit.
There is a cycle speed up jumper on the control. This can be used to reduce the time between defrost cycle operation without waiting for time to elapse. This can be used to check defrost operation of the unit without waiting for the outdoor ambient to fall into the defrost region. Use a small screwdriver or other metallic object, or another ¼ inch QC, to short between the SPEEDUP terminals to accelerate the HPC timer and initiate defrost.
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE 1. NOTE: A thorough understanding of the defrost cycle sequence is essential. Review that section earlier in this manual prior to troubleshooting the control. Turn on AC power supply to unit. 2. Turn thermostat blower switch to “fan on” – the indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.) 3. Turn thermostat blower to “auto” position. Indoor blower should stop.
CHECKING TEMPERATURE SENSOR OUTSIDE UNIT CIRCUIT 1. Disconnect temperature sensor from board and from outdoor coil. 2. Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open. 3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part is ± 10%.) 4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat pump control. 5.
FAN BLADE SETTING DIMENSIONS REFRIGERANT CHARGE Shown in the drawing in Figure 14 are the correct fan blade setting dimensions for proper air delivery across the outdoor coil. The correct system R-22 charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6 inches from compressor) as shown in the Table 7.
TABLE 10 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY Model S p eed K W WH421 WH483 WH602 High Speed Low Speed High Speed Low Speed High Speed Low Speed -A00 -A04 -A05 -A10 -A15 -A20 .50 ----.50 .50 .50 ----- .50 ----.50 .45 .45 ----- .50 .50 .50 .50 .50 .50 .50 .50 .50 .45 .45 .45 .50 ----.50 .50 .50 .50 .40 ----.25 .25 .25 .25 -B00 -B09 -B15 -B18 .50 .50 .50 ----- .50 .45 .45 ----- .50 .50 .50 .50 .50 .45 .45 .45 .50 .50 .50 .50 .40 .30 .30 .30 -C00 -C09 -C15 .50 .50 .50 .50 .40 .40 .
TABLE 12 HEATING PRESSURES – (ALL TEMPERATURES °F) Model Return Air Temperature WH421 Pressure 0 70 deg. Low S i de High Side WH483 70 deg. WH602 70 deg.
