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Bryant 663C - page 1
NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property dam ...
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Bryant 663C - page 2
II. INSTALL ON A SOLID, LEVEL MOUNTING PAD If conditions or local codes require the unit be attached to pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 3 to determine base pan size and knockout hole location. On rooftop applications, mount on level platform or frame ...
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Bryant 663C - page 3
VII. CHECK OUTDOOR CHECK-FLO-RATER® PISTON Check outdoor unit piston. Remove retainer on liquid service valve and check piston size with matching number listed on outdoor unit rating plate. VIII. CHECK DEFROST THERMOSTAT Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distribut ...
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Bryant 663C - page 4
IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight. X. MAKE ELECTRICAL CONNECTIONS WARNING: To avoid personal injury or death, ...
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Bryant 663C - page 5
WARNING: The unit cabinet must have an uninter- rupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Failure to follow this warning can result in an electric shock, fire, or death. B. Connect ...
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Bryant 663C - page 6
Fig. 9—Typical 24-v Circuit Connections using Bryant Model HP Thermostat with Fan Coils and No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats A97400 24 VAC HOT R G W/W1 Y/Y2 O/W2 R W3 W2 RVS COOLING C B S1 S2 W2 BRYANT PROGRAMMABLE THERMOSTAT MODEL HP TWO? ...
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Bryant 663C - page 7
Fig. 10—Typical 24-v Circuit Connections using Other HP Thermostats with Fan Coils and No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats A97404 24 VAC HOT R C W2 Y G R W3 W2 G RVS COOLING E W2 OTHER HP THERMOSTAT TWO OUTDOOR THERMOSTATS FA, FB ...
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Bryant 663C - page 8
Fig. 12—Typical 24-v Circuit Connections using Bryant Model 2S Thermostat with FK4C Fan Coil and Smart Staging A97405 24 VAC HOT R G W/W1 Y/Y2 Y/Y2 Y1/W2 R DH RVS COOLING C B L S1 S2 Y W2 BRYANT PROGRAMMABLE THERMOSTAT MODEL 2S FK4C FAN COIL HEAT PUMP G O O/W ...
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Bryant 663C - page 9
Fig. 13—Typical 24-v Circuit Connections using Bryant Model HP Thermostat with Smart Heat and No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats A97409 24 VAC HOT R G W/W1 Y/Y2 O/W2 RVS COOLING C B S1 S2 SUPPLEMENTAL HEATING RELAY BRYANT PROGRAMMABLE THER ...
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Bryant 663C - page 10
Fig. 14—Typical 24-v Circuit Connections using Other HP Thermostats with Smart Heat and No Outdoor Thermostat, 1 Outdoor Thermostat, or 2 Outdoor Thermostats A97412 24 VAC HOT R C Y G O RVS COOLING W2 OTHER HP THERMOSTAT HEAT PUMP E R C Y G O W2T W3 W2D Y 0 R C ...
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Bryant 663C - page 11
providing electrical potential to second heater sequencer (if used). If outdoor temperature falls below setting of outdoor thermostat (field-installed option), contacts close to complete circuit and bring on second bank of supplemental electric heat. When thermostat is satisfied, its contacts open, de-energizing contactor and sequencer. All heaters ...
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Bryant 663C - page 12
XIV. CHECK CHARGE Factory charge is shown on unit rating plate. To check charge in cooling mode, refer to Cooling Only Procedure. To check charge in heating mode, refer to Heating Check Chart Procedure. A. Cooling Only Procedure NOTE: If subcooling charging conditions are not favorable, charge must be weighed in accordance with unit rating plate ± ...
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