Airedale Condensing Units (CU) 3kW - 80kW - Manual (Page 16)

CUS 15 - 60 / HCU 20 – 30D
Condensing Units
Chiller & Condensing Units
Installation & Maintenance:Part No: 6259592 IM 07\14
16
Electrical Information
CONTROL PANEL
Standard Wiring
Diagram The condensing units are designed to operate in conjunction with other Airedale units,
and are also suitable for matching to other air handling units. A wiring diagram is
supplied with each unit and should be referred to when carrying out the installation.
Components CUS 15 - 30D AND HCU 20 - 30D
The following MCB’s are fitted as standard:
1 Single phase control circuit breakers (mains and control voltage).
2 Three phase compressor circuit breakers.
The following contactors/overloads are fitted:
1 CP1 and CP2 - Main compressor contactors.
2 Compressor thermal overload (CU 30D only).
3 CD1 - Condenser Fan Contactor.
The following relays are fitted, some are option dependent:
1 R1 - Delay Start Relay - Circuit No 1.
2 R2 - Delay Start Relay - Circuit No 2.
3 R3 - HP/LP Trip Relay - Circuit No 2
4 R4 - Relay - Circuit No 1.
5 R5 - Relay - Circuit No 2.
6 R6 - HP/LP Trip Relay - Circuit No 1
Other components are as follows, some are option dependent:
1 Compressor Sequence Switch
2 T1 - Delay Start Timer - Circuit No 1
3 T2 - Delay Start Timer - Circuit No 2
4 In-line pressure switches (HP 2 off, LP 2 off).
5 Electronic pressure operated condenser fan speed controller (One Off)
CUS 40 - 60D
The following MCB’s are fitted as standard:-
1 Single phase control circuit breakers (mains and control voltage)
2 Three phase compressor circuit breakers
The following contactors/overloads are fitted:-
1 CP1 to CP4 - Main compressor contactors
2 Compressor thermal overloads
3 CD1 and CD2 - Condenser Fan Contactors
The following relays are fitted, some are option dependent:
1 R1 and R3 - Delay Start Relay - Dual Compressor - Circuit No 1
2 R4 and R6 - Delay Start Relay - Dual Compressor - Circuit No 2
3 R2 and R5 - HP/LP Trip Relays
Other components are as follows, some are option dependent:
1 Compressor Sequence Switch
2 T1 and T2 - Delay Start Timer - Dual Compressor - Circuit No 1
3 T4 and T5 - Delay Start Timer - Dual Compressor - Circuit No 2
4 In-line pressure switches (HP 2 off, LP 2 off).
5 Electronic pressure operated condenser fan speed controller (Two Off)