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Bryant 764A - page 1
IMPORT ANT — READ BEFORE INST ALLING 1. Read and become familiar with these installation in- structions before installing this unit (Fig. 1). Retain these instructions for future maintenance and repair . 2. Be sure the installation conforms to all applicable local and national codes. W ear safety glasses and work gloves. Use quenching cloth for u ...
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Bryant 764A - page 2
UNIT 564A/764A ELECTRICAL CHARACTERISTICS UNIT WEIGHT CENTER OF GRA VITY mm [in.] Lb Kg X Y Z 024 208/230-1-60 222 101 355.6 [14.00] 508.0 [20.00] 241.3 [9.50] 030 208/230-1-60 236 107 355.6 [14.00] 508.0 [20.00] 241.3 [9.50] 036 208/230-1-60, 208/230-3-60 250 1 14 355.6 [14.00] 508.0 [20.00] 241.3 [9.50] LEGEND NEC — National Electrical Code REQ ...
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Bryant 764A - page 3
UNIT 564A/764A ELECTRICAL CHARACTERISTICS UNIT WEIGHT CENTER OF GRA VITY mm [in.] Lb Kg X Y Z 042 208/230-1-60, 208/230-3-60 297 135 355.6 [14.00] 508.0 [20.00] 304.8 [12.00] 048 208/230-1-60, 208/230-3-60 310 1 14 355.6 [14.00] 508.0 [20.00] 304.8 [12.00] LEGEND NEC — National Electrical Code REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL, mm [in. ...
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Bryant 764A - page 4
UNIT 564A/764A ELECTRICAL CHARACTERISTICS UNIT WEIGHT CENTER OF GRA VITY mm [in.] Lb Kg X Y Z 060 230-1-60, 208/230-3-60, 460-3-60 350 159 355.6 [14.00] 508.0 [20.00] 355.6 [14.00] LEGEND NEC — National Electrical Code REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL, mm [in.] T op of Unit .............................. 0 Duct Side of Unit .......... ...
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Bryant 764A - page 5
I. LOCA TE THE UNIT A. Clearance Provide suf f icient space for condenser airflow clearance, wir- ing, and servicing unit. See Fig. 2-4. Locate unit where supply- and return-air ducts can be conveniently brought out to unit duct connections. Unit may be placed with duct side as close to building as top removal, duct connections, and power connec- ...
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Bryant 764A - page 6
T able 1 — Physical Data UNIT 564A AND 764A 024 030 036 042 048 060 OPERA TING WEIGHT (lb) 222 236 250 297 310 350 COMPRESSOR TYPE Reciprocating REFRIGERANT R-22 Charge (lb) 2.8 3.9 4.7 4.4 6.1 7.5 REFRIGERANT METERING DEVICE Acutrol™ System CONDENSER COIL Copper T ubes, Aluminum Plate Fins Rows...Fins/in. 1...17 1...17 2...17 1...17 2...17 2.. ...
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Bryant 764A - page 7
Install Flanges for Ductwork Connections (564A/764A060 only) The size 060 units are shipped with flanges which must be field-installed on the unit. T o install unit flanges: 1. Five pieces of flange are shipped on the return air open- ing of the unit. Remove the flanges from the shipping position. See Fig. 9. Screws are field-supplied. 2. One ...
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Bryant 764A - page 8
C. Converting Horizontal Discharge Units to Downflow (V ertical) Discharge W ARNING: Before performing service or mainte- nance operations on system, turn of f main power to unit. T urn off accessory heater power switch if applicable. Elec- trical shock can cause personal injury . Units are dedicated side-supply products. Units are not con- vertib ...
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Bryant 764A - page 9
Route thermostat wires through grommet providing a drip loop at the panel. Connect low-voltage leads to the thermo- stat as shown in Fig. 16. The unit transformer supplies 24-v power for complete system including accessory electrical heater . T ransformer is factory wired for 230-v operation. If supply voltage is 208 v , rewire transformer primary ...
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Bryant 764A - page 10
T able 2 — Electrical Data UNIT 564A/764A NOMINAL VOL T AGE (V -Ph-Hz) VOL T AGE RANGE COMPRESSOR OFM IFM ELECTRIC HEA T POWER SUPPL Y DISCONNECT SIZE Min Max RLA LRA FLA FLA Nominal kW* FLA MCA MOCP FLA LRA 024 208/230-1-60 187 254 10.9 61.0 0.9 2.4 —/— —/— 16.9/ 16.9 20/ 20 16/ 16 68 3.8/ 5.0 18.1/20.8 25.6/ 29.0 30/ 30 24/ 27 7.5/10.0 ...
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Bryant 764A - page 11
Special Procedures for 208-V Operation W ARNING: Make sure that the power supply to the unit is switched OFF before making any wiring changes. Electrical shock can cause personal injury or death. 1. Disconnect the orange transformer-primary lead from the contactor . See unit wiring label. 2. Remove the wirenut from the terminal on the end of the re ...
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Bryant 764A - page 12
Proceed as follows to inspect and prepare the unit for initial start-up: 1. Remove all access panels. 2. Read and follow instructions on all W ARNING, CAU- TION, and INFORMA TION labels attached to, or shipped with, unit. 3. Make the following inspections: a. Inspect for shipping and handling damages such as broken lines, loose parts, disconnected ...
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Bryant 764A - page 13
C. Unit Controls Compressor High-Pressure Relief V alve — V alve is located in compressor . Relief valve opens at a pressure dif ferential of approximately 450 psi between suction (low side) and discharge (high side) to allow pressure equalization. Internal Current and T emperature Sensing Overload — Device resets automatically when internal co ...
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Bryant 764A - page 14
CARE AND MAINTENANCE NOTE: The following steps should be performed by a quali- fied service person. W ARNING: Before installing or servicing unit, turn of f main power to system to avoid shock hazard or in- jury from rotating parts. There may be more than one disconnect switch. T urn of f accessory heater power if ap- plicable. Electrical shock ca ...
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Bryant 764A - page 15
SERVICE NOTE: The following steps should be performed by a quali- fied service person. W ARNING: Before installing or servicing unit, turn of f main power to system to avoid shock hazard or in- jury from rotating parts. There may be more than one disconnect switch. T urn of f accessory heater power if applicable. Electrical shock can cause persona ...
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Bryant 764A - page 16
IV . ELECTRICAL CONTROLS AND WIRING Inspect and check the electrical controls and wiring an- nually . Be sure to turn of f all electrical power to the unit. Remove the control, evaporator fan, and compressor compart- ment access panels to locate all the electrical controls and wiring. Check all electrical connections for tightness. Tighten all scre ...
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Bryant 764A - page 17
Fig. 19 — Cooling Charging Chart — 564A/764A024 Fig. 20 — Cooling Charging Chart 564A/764A030 Fig. 21 — Cooling Charging Chart — 564A/764A036 Fig. 22 — Cooling Charging Chart — 564A/764A042 —17— ...
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Bryant 764A - page 18
Fig. 23 — Cooling Charging Chart — 564A/764A048 Fig. 24 — Cooling Charging Chart — 564A/764A060 —18— ...
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Bryant 764A - page 19
COOLING TROUBLESHOOTING CHART SYMPTOM CAUSE REMEDY Compressor and con- denser fan will not start. Power failure Call power company . Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker . Defective thermostat, contactor , transformer, or control relay Replace component. Insuff icient line voltage Determine cause and correct. ...
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Bryant 764A - page 20
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Bryant 764A - page 21
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Bryant 764A - page 22
P ACKAGED SERVICE TRAINING Our packaged service training programs provide an excellent way to increase your knowledge of the equipment discussed in this manual. Product programs cover: • Unit Familiarization • Installation Overview • Maintenance • Operating Sequence A large selection of product, theory , and skills programs is available. Al ...
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Bryant 764A - page 23
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Bryant 764A - page 24
ST ART -UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMA TION MODEL NO.: DA TE: SERIAL NO.: TECHNICIAN: II. PRE-ST ART -UP (insert checkmark in box as each item is completed) M VERIFY THA T ALL P ACKING MA TERIALS HA VE BEEN REMOVED FROM UNIT M VERIFY THA T CONDENSA TE CONNECTION IS INST ALLED PER INST ALLA TION INSTRUCTIONS M CHE ...
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