Airedale Ultima Remote Air Cooled 75kW - 450kW - Manual (Page 32)

ULTIMA
™ REMOTE AIR COOLED
Chillers
32
Chillers
Technical Manual : Part No 6259485 V1.6.0_07_2014
Installation Data
ELECTRICAL
General 
As standard the equipment is designed for 400V, 3 phase, 3 wire 50Hz and a
separate permanent 230V, 1 phase, 50Hz supply, to all relevant IEE regulations,
British standards and IEC requirements.

A fused and isolated electrical supply of the appropriate phase, frequency and
voltage should be installed.

The control voltage to the interlocks is 24V. Always size the low voltage interlock
and protection cabling for a maximum voltage drop of 2V.
CAUTION Wires should be capable of carrying the maximum load current under non-fault
conditions at the stipulated voltage.

Avoid large voltage drops on cable runs, particularly low voltage wiring.
CAUTION A separately fused, locally isolated, permanent single phase and neutral supply
MUST BE FITTED for the compressor sump heater, evaporator trace heating and
control circuits, FAILURE to do so could INVALIDATE WARRANTY.
INTERCONNECTING WIRING
L1  
L2  
L3  
E  
Mains incoming supply 400V/3PH/50Hz
L4  
N1  
E  
Separate Permanent Supply 230V/1PH/50Hz
2   External Trace Heater Connections
N   240V/500W max.
502   (1) Evaporator Pump Interlock 24VAC
503  
504   (1) Evaporator Pump Water Flow Switch 24VAC
506  
502   Unit Remote On/Off 24VAC
505  
502   Setback Setpoint Temperature switch
507  
502   Remote Pump Interlock 24VAC
522  
573   Circuit 1 Volt Free Common Alarm
574   Volt Free Alarm N/O
575   Volt Free Alarm N/C
576   Circuit 2 Volt Free Common Alarm
577   Volt Free Alarm N/O
578   Volt Free Alarm N/C
RX- 
RX+  pLan Network Connections
URAC75 - URAC450
GND 
CAUTION (1) MUST be directly wired to the chiller to validate warranty.