INSTALLATION INSTRUCTIONS WALL MOUNTED PACKAGE AIR CONDITIONERS Model: W12A2-A W12A1-K Bard Manufacturing Company, Inc. Bryan, Ohio 43506 Since 1914....Moving ahead just as planned.
CONTENTS Getting Other Informations and Publications 3 Wall Mount General Information Air Conditioner Wall Mount Model Nomenclature.......4 Shipping Damage.......................................................6 General.......................................................................6 Duct Work...................................................................7 Filters..........................................................................7 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.
WALL MOUNT GENERAL INFORMATION AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE W 12 MODEL NUMBER A 2 – A 00 X X X REVISIONS VOLTS & PHASE A - 230/208/60/1 K - 115/60/1 KW 00 - No KW 02 - 2.2 KW 03 - 3.6 KW 05 - 5.
FIGURE 1 UNIT DIMENSIONS 32.00 30.13 17.00 Supply Air Opening Return Air Opening 17.00 2.25 Supply Air Opening 5.00 2.00* 5.00 5.00* 10.00 Return Air Opening 10.00 Top Rain Flashing Shipping Location 20.25 2.50 Optional Electrical Entrance 26.75 23.75 Side Wall Mounting Flanges (Built In) Back View Back View Return air opening is in upper field convertible position Return air opening is in lower factory standard position Built-in Rain Hood 4° Pitch 31.06 14.
TABLE 2 ELECTRICAL HEAT SPECIFICATIONS SINGLE CIRCUIT Rated Volts and Phase No. Field Power Circuits l Minimum Circuit Ampacity j Maximum External Fuse or Circuit Breaker k Field Power Wire Size k Ground Wire Size W12A2-A00 A03 A05 230/208-1 1 1 1 9 20 28 15 20 30 14 12 10 14 12 10 W12A1-K00 K02 115-1 1 1 20 29 30 30 10 10 10 10 Models Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. Based on 75°C copper wire.
DUCT WORK FRESH AIR INTAKE 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. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage. All units are built with fresh air inlet slots punched in the service panel.
INSTALLATION INSTRUCTIONS WALL MOUNTING INFORMATION 1. These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides. 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 Page 2100-509E 9 of 17 FIGURE 3 MOUNTING INSTRUCTIONS
FIGURE 4 WALL MOUNTING INSTRUCTIONS SEE FIGURE 3 - MOUNTING INSTRUCTIONS FIGURE 5 WALL MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS Manual 2100-509E Page 10 of 17
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS Manual Page 2100-509E 11 of 17
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.
START UP THESE UNITS REQUIRE R-410A REFRIGERANT AND POLYOL ESTER OIL. GENERAL: 1. Use separate service equipment to avoid cross contamination of oil and refrigerants. 2. Use recovery equipment rated for R-410A refrigerant. 3. Use manifold gauges rated for R-410A (800 psi/250 psi low). REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance.
START UP IMPORTANT INSTALLER NOTE For improved start up performance, wash the indoor coil with a dishwasher detergent. SERVICE HINTS 1. Caution owner to maintain clean air filters at all times. Also not to needlessly close off supply and return air registers. This reduces airflow through the system which shortens equipment service life as well as increasing operation costs. 2. The unit is equipped with a high pressure cut out switch. 3.
ADJUSTMENTS PRESSURE SERVICE PORTS Adjustable Delay on Make and Delay on Break Timer High and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure chart can be found later in the manual covering all models. It is imperative to match the correct pressure chart to the unit by model number. The potentiometer is used to select Delay on Break time from 30 seconds to 5 minutes.
TROUBLESHOOTING FAN BLADE SETTING DIMENSIONS TABLE 4 INDOOR BLOWER PERFORMANCE CFM @ 230V / 115V Shown in Figure 7 is the correct fan blade setting dimension for proper air delivery across the outdoor coil. Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimension below be checked and blade adjusted in or out on the motor shaft accordingly. FIGURE 7 FAN BLADE SETTING DIMENSION W12Aà E.S.P. in H 2O 230V / 115V .0 .1 .2 .3 .
TABLE 7 PRESSURE TABLE COOLING Model W12Aà Air Temperature Entering Outdoor Coil °F Return Air Temperature Pressure 75° 80° 85° 90° 95° 100° 105° 100° 115° 75 deg. DB 62 deg. WB Low Side High Side 120 291 124 310 129 332 133 355 136 379 138 405 141 432 142 460 143 490 80 deg. DB 67 deg. WB Low Side High Side 128 298 133 318 138 340 142 364 143 387 148 415 151 443 152 472 153 503 85 deg. DB 72 deg.
