INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE AIR CONDITIONERS MODELS WL423 WL484 WL602 Bard Manufacturing Company Bryan, Ohio 43506 Since 1914...Moving ahead just as planned.
CONTENTS Start Up Important Installer Note ......................................... High Pressure Switch ............................................ Three Phase Scroll Compressor Start Up ............. Phase Monitor ....................................................... Condenser Fan Operation ..................................... Service Hints ......................................................... Sequence of Operation .......................................... Compressor Control Module ............
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 MODEL NUMBER CAPACITY 42 - 3 1/2 Ton 48 - 4 Ton 60 - 5 Ton WL 42 3 – A 10 X N X X REVISIONS COLOR OPTIONS X - Beige (Standard) 1 - White 2 - Mesa Tan 4 - Buckeye Gray 5 - Desert Brown 6 - Dark Bronze KW VOLTS & PHASE A - 230/208/60/1 B - 230/208/60/3 C - 460/60/3 CONTROL MODULES (See Chart Below) X A VENTILATION OPTIONS X - Barometric Fresh Air Damper (Standard) B - Blank-off Plate M - Motorized Fresh Air Damper V - Comm
FIGURE 1 UNIT DIMENSIONS Width Model (W) Depth (D) Height (H) Supply A B Return C B E F G I J K L M N O P Q R S T WL42 WL48 42.075 22.432 84.875 9.88 29.88 15.88 29.88 43.88 19.10 31.66 30.00 32.68 26.94 34.69 32.43 3.37 42.88 23.88 10.00 1.44 16.00 1.
TABLE 2 ELECTRICAL SPECIFICATIONS SINGLE CIRCUIT 3 Rated Volts & P h ase Model N o. Field Minimum P o w er Circuit Circuits Ampacity 1 DUAL CIRCUIT 2 2 3 1 2 2 Maximum External F u se or Ckt.
SHIPPING DAMAGE DUCT WORK 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. All duct work, supply and return, must be properly sized for the design air flow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing.
FILTERS A one inch throwaway filter is supplied with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the service door. A one inch washable filter and two inch pleated filter are also available as optional accessories.
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. 3. Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit. MOUNTING THE UNIT 1.
Manual 2100-400 Page 8 FIGURE 3 MOUNTING INSTRUCTIONS MIS-947
FIGURE 4 ELECTRIC HEAT CLEARANCE SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR WALL MOUNTED UNIT SHOWING 1/4 INCH CLEARANCE TO COMBUSTIBLE SURFACES. MIS-277 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 5 WALL MOUNTING INSTRUCTIONS WALL STRUCTURE SEE FIGURE 3 – MOUNTING INSTRUCTIONS FACTORY SUPPLIED RAIN FLASHING. MOUNT ON UNIT BEFORE INSTALLATION SUPPLY AIR DUCT SUPPLY AIR OPENING RETURN AIR OPENING SUPPLY AIR OPENING RETURN AIR OPENING RETURN AIR OPENING BOTTOM MOUNTING BRACKET. MOUNT ON WALL BEFORE INSTALLING UNIT. MIS-948 FIGURE 6 WALL MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS ATTACH TO TOP PLATE OF WALL 1.
FIGURE 7 COMMON WALL MOUNTING INSTALLATIONS FREE AIR FLOW NO DUCT FALSE WALL INSTALLATION DUCTED SUPPLY RETURN AT UNIT CLOSET INSTALLATION MIS-1050 Manual 2100-400 Page 11
WIRING – MAIN POWER WIRING – LOW VOLTAGE WIRING 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.
FIGURE 8 UNIT 24V TERMINAL BOARD MIS-1373A Manual 2100-400 Page 13
START UP IMPORTANT INSTALLER NOTE PHASE MONITOR For improved start up performance wash the indoor coil with a dish washing detergent. All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal. HIGH PRESSURE SWITCH 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.
COMPRESSOR CONTROL MODULE The compressor control module is standard on the WL484 and WL602 models covered by this manual and is optional on the WL423 model. The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm relay output. NOTE: Both high and low pressure switch controls are inherently automatic reset devices.
TROUBLESHOOTING 3. Remove screws holding fan shroud to condenser and bottom. Nine (9) screws. FAN BLADE SETTING DIMENSIONS Shown in Figure 10 is the correct fan blade setting dimension for proper air delivery across the outdoor coil. 4. Unwire condenser fan motor. 5. Slide complete motor, fan blade, and shroud assembly out the left side of the unit.
TABLE 9 MAXIMUM ESP OF OPERATION ELECTRIC HEAT ONLY TABLE 8 RECOMMENDED AIRFLOW Model Rated C FM * Rated ESP * Recommended Airflow Range WL423 1400 .30 1600 - 1150 WL484 1550 .20 1750 - 1285 WL602 1700 .30 1950 - 1375 Model WL423 WL602 High Low High Low High Low S p eed S p eed S p eed S p eed S p eed S p eed KW * Rated CFM and ESP on high speed tap. WL484 -A05 -A10 -A15 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 .50 -B00 -B09 -B15 .50 .50 .50 .50 .
Part Number Description WL423-A WL423-B WL423-C WL484-A WL484-B WL484-C WL602-A WL602-B WL602-C TABLE 11 OPTIONAL ACCESSORIES BOP-5 BFAD-5 MFAD-5 Blank Off Plate Barometric Fresh Air Damper Motorized Fresh Air Damper X X X X X X X X X X X X X X X X X X X X X X X X X X X CRV-5 EIFM-5 Commercial Ventilator with Exhaust Economizer with Exhaust X X X X X X X X X X X X X X X X X X CMA-6 CMA-10A Low Ambient Control (LAC) LPC + HPC + TDR X X X X X X X X X CMA-13A CMC-15 C
