Wiring Diagrams. Figure Number 1

Transcription

1 09AW,AZ00-04 Remote Air-Cooled Condenser Wiring Diagrams AWH, AWL AWH, AWL AWH, AWL, AWV, AWW Unit AZH 006 AZL 006 AZH, AZL AZH, AZL, AZV, AZW DIAGRAM INDEX SCHEMATICS Voltage 60 Hz 08/30, 575 ( phase) 08/30, 460 (3 phase) 08/30, 575 ( phase) 08/30, 460 (3 phase) 08/30 ( phase) 08/30, 460, 575 (3 phase) 08/30, 575 ( phase) 08/30, 460 (3 phase) 08/30, 575 ( phase) 08/30, 460 (3 phase) 08/30, 575 ( phase) 08/30, 460 (3 phase) 08/30 ( phase) 08/30, 460, 575 (3 phase) Figure Number LEGEND Capacitor EQUIP Equipment FB Fused Block FC Fan Cycling Control FD Fused Disconnect GND Ground L Line M Fan Motor Contactor Fan Motor National Electrical Code PB Power Terminal Block Terminal Block TRAN Transformer Terminal Block Connection Unmarked Terminal Factory Wiring Field Wiring NOTES:. Wiring for field power supply must be rated at 60 C (40 F) minimum. Use copper or copper-clad aluminum conductors only.. Replacement of factory wires must be with 90 C (94 F) appliance wiring material or its equivalent. 3. Factory wiring is in accordance with. Field modifications or additions must be in compliance with all applicable codes. 4. Fan motors are inherently thermally protected. No overloads required. 5. Motor is located on header end of the unit. 6. Field control connections are made to terminal block. Contactor (when supplied) holding voltage is 4 volts. UNIT COMPONENT FIGURE NUMBER Head Pressure Control Wiring 3-6 Fan Cycling Head Pressure All Control Wiring 5 and 6 Head Pressure Control Operation 7 Winter Start 8 09AZ with 50BZ Winter Start, Evaporator Defrost Thermostat Liquid Line Solenoid Valve 9 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 4 PC Catalog No Printed in U.S.A. Form 09AW,AZ-W Pg -99 Replaces: New Tab 4a 4a

2 SAFETY CONSIDERATIONS Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). Only trained, qualified installers and service mechanics should install, start up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained service personnel. When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky equipment. ELECTRIC SHOCK HAZARD Open all remote disconnects before servicing this equipment. SEQUENCE OF OPERATION The 09AW,AZ condensing unit may be used with different types of compressor and evaporator combinations. The sequence of operation is dependent on the compressor and specific indoor unit. General Applications Whenever there is a call for cooling, the condenser fan starts with the compressor and runs as long as there is a call for cooling. On circuit units, both fans are activated on the call for first stage and run with the lead compressor. Application with 50BZ Units The following control sequence is for the 09AW and 09AZ when matched with the 50BZ unit. Cooling On a call for cooling, the thermostat closes and energizes terminals Y and T on the 50BZ unit low voltage terminal strip. The fan-motor contactor (M) is energized with 4 v through terminals T and C. The fan(s) will continue to run until the thermostat is satisfied. At that time, the thermostat will open T, and the fan will stop immediately. If the condenser-fan motor overheats due to motor overload or lack of cooling air, the internal fan protector will open the circuit internally in the motor, and the fan will stop. If a safety control in the 50BZ unit opens, the 09AW or 09AZ condenser fan will not be affected, and the fan will continue to run as long as the thermostat is closed. Factory-Installed Optional Controls FAN CYCLING HEAD PRESSURE CONTROL This option allows operations to 30 F (depending on load) by stopping the second condenser fan at outdoor temperatures below 60 F. It is recommended that the second fan on all condenser-fan units be equipped with this option to better match load to condenser capacity. See Fig. 5-7 for wiring. HEAD PRESSURE CONTROL This option contains a fan speed-control device activated by a pressure sensor. With the speed control, the condenser-fan motor speed is controlled in response to the saturated condensing pressure. This factory-installed option maintains the condensing temperature at 00 ± 0 F (38 ± 6 C) for outdoor temperatures down to 0 F ( 9 C). NOTE: Wind baffle may be required. See Installation Instructions. The head pressure control consists of a solid-state circuit on a printed circuit board, sensor, transformer, and single phase compatible condenser-fan motor. See Fig. 4-7 for wiring. NOTE: The fan cycling head pressure control will be installed on all condenser-fan units with head pressure control. Field-Installed Accessory Controls DEFROST THERMOSTAT (50BB ) The defrost thermostat is installed on the evaporator coil and is recommended for use with the winter start control. The thermostat will open the control switch if frost begins to form on the evaporator coil. The compressor will stop but the 09AW or 09AZ unit will continue to run. See Fig. 9 for wiring. SOLENOID VALVE A field-supplied solenoid valve (locate at indoor unit) wired in parallel with the compressor contactor coil will shut off the liquid line to prevent refrigerant migration back to the compressor during the off cycle. This valve is recommended for installations where piping length is over 75 ft. If liquid line solenoid valves are used (units over 7 tons), check available transformer voltampere capability. See Fig. 9 for wiring. WINTER START (38AE9000) When used in conjunction with the speed control option, the winter start control will bypass the low-pressure switch for 3 minutes on compressor start-up to allow system pressures to stabilize. NOTE: If units matched with 09AW or 09AZ condenser units are equipped with a 7 psig low-pressure switch (i.e., 50BZ), the 3-minute low-pressure switch bypass is recommended for operation below 50 F. See Fig. 8 and 9 for wiring.

3 CONTACTOR 4 VAC TRANSFORMER TRAN Fig. Field Wiring, Single Phase; 09AWH,AWL00-004, 08/30 and POWER SCHEMATIC AL FUSED CONTACTOR TRAN 4 VAC TRANSFORMER Fig. Field Wiring, Three Phase; 09AWH,AWL00-004, 08/30 and

4 CONTACTOR PB TRAN 4 VAC TRANSFORMER AL FAN CYCLING FC Fig. 3 Field Wiring, Single Phase; 09AWH,AWL006-0, 08/30 and POWER SCHEMATIC AL FUSED POWER TERMINAL BLOCK PB CONTACTOR 4 VAC TRAN TRANSFORMER AL FAN CYCLING FC Fig. 4 Field Wiring, Three Phase; 09AWH,AWL006-0, 08/30 and

5 PB CONTACTOR TRAN 4 VAC TRANSFORMER AL FAN CYCLING FC Fig. 5 Field Wiring, Single Phase; 09AWH,AWL,AWV,AWW04-00, 08/ POWER SCHEMATIC AL FUSED POWER TERMINAL BLOCK PB CONTACTOR 4 VAC TRAN TRANSFORMER AL FAN CYCLING FC Fig. 6 Field Wiring, Three Phase; 09AWH,AWL,AWV,AWW04-00, 08/30, 460, and

6 Fig. 7 Field Wiring, Single Phase; 09AZH006, 08/30 and POWER SCHEMATIC AL FUSED Fig. 8 Field Wiring, Three Phase; 09AZH006, 08/30 and

7 PB CONTACTOR FC Fig. 9 Field Wiring, Single Phase; 09AZH008 and 09AZL006,008, 08/30 and POWER SCHEMATIC AL FUSED POWER TERMINAL BLOCK PB FC Fig. 0 Field Wiring, Three Phase; 09AZH006 and 09AZL006,008, 08/30 and

8 PB AL FAN CYCLING FC Fig. Field Wiring, Single Phase; 09AZH,AZL,AZV,AZW0-06, 08/ POWER SCHEMATIC AL FUSED POWER TERMINAL BLOCK PB AL FAN CYCLING FC Fig. Field Wiring, Three Phase; 09AZH,AZL,AZV,AZW0-06, 08/30, 460, and

9 4 VAC * P66 PRESSURE CONTROL L PB MOTOR L L ACITOR R MAIN AUX. S C *Maximum available va is 40 and can be used to power contactor and indoor unit. Fig. 3 Head Pressure Control Wiring, Single Phase; 09AW and 09AZH006, 08/30 and

10 4 VAC * P66 SPEED CONTROL L PB MOTOR L L L3 ACITOR R MAIN AUX. S C *Maximum available va is 40 and can be used to power contactor and indoor unit. Fig. 4 Head Pressure Control Wiring, Three Phase; 09AW and 09AZH006, 08/30 and

11 4 VAC * P66 PRESSURE CONTROL L PB MOTOR L L R MAIN C ACITOR AUX. S MOTOR R MAIN C ACITOR AUX. S FC *Maximum available va is 40 and can be used to power contactor and indoor unit. Fig. 5 Head Pressure Control and Fan Cycling Head Pressure Control Wiring for Two-Fan Units, Single Phase; 09AW and 09AZL006-06, 08/30 and

12 4 VAC * P66 PRESSURE CONTROL L PB MOTOR L L L3 ACITOR R MAIN AUX. S C MOTOR FC *Maximum available va is 40 and can be used to power contactor and indoor unit. Fig. 6 Head Pressure Control and Fan Cycling Head Pressure Control Wiring for Two-Fan Units, Three Phase; 09AW and 09AZL006-06, 08/30, 460, and

13 JOHNSON CONTROLS P66 PERFORMANCE CURVE 97% MOTOR VOLTAGE 90% 0% TO 40% OF LINE (AS SPECIFIED) NO FAN OPERATION IN THIS PRESSURE RANGE ETR 30 TO 60 PSIG 0 PSIG OPERATING OPERATING 350 PSIG RANGE RANGE PLUS (90/50 PSIG) 0 OR 30 PSI* PRESSURE INPUT OPERATIONAL SEQUENCE Pressure Input Motor Voltage (VAC, True RMS) Pressure Input is Between 0 PSIG and the Low End 0 to 5 Volts of the Operation Range. Pressure is at the Low End of the Operation Range. Start Voltage 0% to 40% of Line Pressure is in the Motor Voltage Varies Directly with Operation Range. System Pressure from Start Voltage to 90% of Line Voltage. Pressure is at the High End Output Voltage is 90% of of the Operation Range. Line Voltage. Pressure is Above the Operation Range. A Further Pressure Increase of 0 to 30 PSI Will Increase Motor Voltage to 97% of the Applied Voltage. LEGEND ETR Effective Throttling Range *0 PSI for 30 PSI ETR, 30 PSI for 60 PSI ETR. NOTES:. When using this control on a 3-phase system, the 4-v control circuit and the line voltage must be on the same phase.. The P66 is a single-phase control that can only be used with singlephase motors. Fig. 7 Head Pressure Control Operation; P66 Performance Curve, Operational Sequence T TDR C LPS LEGEND C Contactor Coil LPS Low-Pressure Switch T Time Delay Relay Coil TDR Time Delay Relay (38AE9000) Factory Wiring Field Wiring Fig. 8 Wiring for Winter Start Control (Indoor Unit Wiring Modification) 3

14 FIELD THERMOSTAT CLASS II CONT COOL OFF AUTO TC TB R G T Y X C ORN LOGIC 3 TDR ORN BRN RED X BRN R LOGIC BRN CLO 3 LPS HPS BLU BLU BLU C C C BLU C CR C WIRING IN 09AZ CONTROL BOX FC DT T TDR WINTER START LLS* C Compressor Contactor (in 50BZ) CLO Cycle-LOC Control (in 50BZ) CONT Continuous Fan CR Control Relay (in 50BZ) DT Defrost Thermostat (Accessory) FC Fan Cycling Control / Motor Contactor (in 09AZ) HPS High-Pressure Switch (in 50BZ) LLS Liquid Line Solenoid (Accessory) LEGEND LPS Low-Pressure Switch (in 50BZ) National Electrical Code R Resistor T Timer TB Low-Voltage Terminal Block (in 50BZ) TC Thermostat Cooling TDR Winter Start Control (38AE9000) TDR Time Guard Time Delay (in 50BZ) *Solenoid valve is field-supplied. Resistor may be internal to CLO on some models. Fig. 9 Wiring for 09AZ Unit with 50BZ Using Winter Start, Evaporator Defrost Thermostat, and Liquid Line Solenoid Valve 4

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16 Copyright 999 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 4 PC Catalog No Printed in U.S.A. Form 09AW,AZ-W Pg 6-99 Replaces: New Tab 4a 4a