WALL MOUNTED PACKAGED INSTALLATION AIR CONDITIONER INSTRUCTIONS Model: WA253 MIS-383 Bard Manufacturing Company Bryan, Ohio 43506 Since 1914...Moving ahead just as planned. Manual No.
CONTENTS Getting Other Information ................................... 1 Start Up .............................................................. 11 Model Nomenclature .............................................. 2 Shipping Damage ................................................... 4 General ................................................................... 4 Duct Work ............................................................... 4 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.
WALL MOUNT GENERAL INFORMATION AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE MODEL NUMBER WA 25 3 — A 10 X X X CAPACITY 25 - 2 Ton w/scroll compressor REVISIONS X VENTILATION OPTIONS X - Barometric Fresh Air Damper B - Blank-off Plate M - Motorized Fresh Air Damper V - Commercial Ventilator Motorized with Exhaust E - Economizer (Internal) - Fully Modulating with Exhaust CONTROL MODULES J - Standard on All Models J COLOR OPTIONS X - Beige (Standard) 1 - White 2 - Mesa Tan 4 - Buckeye Gray 5 - Des
FIGURE 1 UNIT DIMENSIONS (in inches) Model Width (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 WA252 33.300 17.125 70.563 7.88 19.88 11.88 19.88 35.00 18.50 25.75 20.56 26.75 28.06 29.25 27.00 2.63 34.13 22.06 10.55 4.19 12.00 5.00 Manual 2100-406 Page 3 FRONT VIEW SIDE VIEW BACK VIEW * Optional top outlet (factory installed only) for WA30 and WA36 models only.
TABLE 2 ELECTRIC HEAT TABLE Models WA253-A 240-1 WA253-B 208-1 208-3 KW A B TU A B TU A B TU A B TU 4 16.7 13,650 14.4 10,240 --- --- --- --- 5 20.8 17,065 18.1 12,800 --- --- --- --- 8 33.3 27,300 28.8 20,475 --- --- --- --- 10 41.6 34,130 36.2 25,600 --- --- --- --- 6 --- --- --- --- 14.4 20,500 12.5 15,360 SHIPPING DAMAGE Upon receipt of equipment, the carton should be checked for external signs of shipping damage.
Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering the wall cavity. CAUTION Some installations may not require any return air duct. A metallic return air grille is required with installations not requiring a return air duct. The spacing between louvers on the grille shall not be larger than 5/8 inches. Any grille that meets the 5/8 inch louver criteria may be used.
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. A bottom mounting bracket is provided for ease of installation, but is not required. 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.
FIGURE 4 WALL-MOUNTING INSTRUCTIONS SEE FIGURE 3 – MOUNTING INSTRUCTIONS FOR OPENING SIZES MIS-548 FIGURE 5 WALL-MOUNTING INSTRUCTIONS SEE UNIT DIMENSIONS FIGURE 1 FOR ACTUAL DIMENSIONS MIS-549 Manual 2100-406 Page 7
FIGURE 6 COMMON WALL-MOUNTING INSTALLATIONS MIS-550 Manual 2100-406 Page 8
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 7 LOW VOLTAGE WIRING DIAGRAM MIS-1373C Manual 2100-406 Page 10
START-UP IMPORTANT INSTALLER NOTE For improved start-up performance, wash the indoor coil with a dishwater detergent. The direction of rotation of the compressor may be changed by reversing any two line connections to the unit. PHASE MONITOR HIGH PRESSURE SWITCH The WA253 models are supplied with a remote reset high pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.
COMPRESSOR CONTROL MODULE Alarm Relay Output The compressor control module is optional on the models covered by this manual. The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm relay output. Alarm terminal is output connection for applications where alarm relay is employed. This terminal is powered whenever compressor is locked out due to HPC or LPC sequences as described.
TROUBLESHOOTING FAN BLADE SETTING DIMENSIONS TABLE 6 SUCTION LINE TEMPERATURES Shown in the drawing below are the correct fan blade setting dimensions 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 dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.
TABLE 9 COOLING PRESSURE – OUTDOOR TEMPERATURE °F Model WA253 Return Air Temperature Pressure 75 D B 62 WB Low S i de High Side 72 212 73 224 75 239 76 254 78 269 79 287 79 305 81 324 82 344 80 D B 67 WB Low S i de High Side 77 217 78 230 80 245 81 260 83 276 84 294 85 313 87 332 88 353 85 D B 72 WB Low S i de High Side 80 225 81 238 83 254 84 269 86 286 87 304 88 324 90 344 91 365 75 80 85 90 95 100 105 110 Low side pressure ± 2 PSIG High side pressure ± 5 PSIG
