INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE HEAT PUMPS MODELS: WH421 WH482 WH602 BARD MANUFACTURING COMPANY Bryan, Ohio 43506 Since 1914...Moving ahead, just as planned.
CONTENTS Getting Other Information and Publications .......... 1 For more information, contact these publishers: ...... 1 Wall Mount General Information ............................. Air Conditioner Wall Mount Model Nomenclature ..... Shipping Damage .................................................... General ............................................................... Duct Work ............................................................... Filters ......................................................
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 CONTROL MODULES (See Chart Below) MODEL NUMBER WH CAPACITY 42 – 3-1/2 Ton 48 – 4 Ton 60 – 5 Ton 48 1 – A 10 X X X X X COIL OPTIONS X – Standard 1 – Phenolic Coated Evaporator 2 – Phenolic Coated Condenser 3 – Phenolic Coated Evaporator and Condenser REVISION VOLTS & PHASE A – 230/208/60-1 B – 230/208/60-3 KW C – 460/60-3 00 – 05 – 06 – 09 – 10 – 15 – 18 – 20 – B No KW 5 KW 6KW 9 KW 10 KW 15 KW 18 KW 20 KW VENTILATION OPTI
FIGURE 1 UNIT DIMENSIONS Manual 2100-219 Page 3 MIS-411
TABLE 2 ELECTRICAL SPECIFICATIONS SINGLE CIRCUIT ! Rated Volts & P h ase Model N o. Field Minimum Pow er Circuit Ckts. Ampacity " DUAL CIRCUIT # # ! " # # 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 1/4 inch clearance to combustible materials for supply air duct is not maintained. See Figure 3.
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. This is required for the first 3 feet of ducting. • It is important to insure that the 1/4 inch minimum spacing is maintained at all points.
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 2100-219 Page 9
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS MIS-550 Manual 2100-219 Page 10
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 THERMOSTAT WIRING COMPRESSOR CUTOFF THERMOSTAT AND OUTDOOR THERMOSTATS Heat pump compressor operation at outdoor temperatures below 0° F are neither desirable nor advantageous in terms of efficiency.
TABLE 4 WALL THERMOSTAT AND SUBBASE COMBINATIONS T hermostat Subbase 8403-045 (T841A1761) --- Predominant Features 1 stg. cool; 2 stg. heat; Mercury bulb Manual changeover 8403-017 (T874R1129) 8404-009 2 stg. cool; 2 stg. heat; Mercury bulb (Q674L1181) Manual changeover 8403-018 (T874N1024) 8404-010 2 stg. cool; 2 stg. heat; Mercury bulb (Q674F1261) Auto or Manual changeover 8403-042 (T8511G1070) --- 1 stg. cool; 2 stg.
START UP IMPORTANT INSTALLER NOTE For improved start-up performance, wash the indoor coil with a dishwashing detergent. CRANKCASE HEATERS WA421 units are provided with compressor crankcase heat. WH602 and WH482 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.
FIGURE 10 DEFROST CONTROL BOARD Manual 2100-219 Page 16
TROUBLESHOOTING SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE 1. Turn on AC power supply to indoor and outdoor units. 2. Turn thermostat blower switch to fan "on" – the indoor blower should start. (If it doesn't, troubleshoot indoor unit and correct problem). 4. Set system to heat or cool. Adjust thermostat to call for heat or cool – the indoor blower, compressor, and outdoor fan should start.
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 11 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 WH482 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) Return Air Pressure Model Temperature 0 5 10 15 17 20 25 30 35 40 45 47 50 55 60 WH421 70 deg. Low Side High Side 21 25 27 29 30 32 35 39 43 48 53 55 58 64 71 141 147 152 158 160 163 169 174 180 190 201 206 214 229 246 WH482 70 deg. Low Side High Side 16 19 22 26 27 29 32 36 39 45 51 54 59 67 77 161 164 168 172 174 177 182 188 195 202 210 213 218 227 236 WH602 70 deg.
