Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 117)

Chillers OptiChill Freecool
Chillers
117
Technical Manual : 7197700 v1.2.0 02_2013
Installation Data
General 
As standard the equipment is designed for 400V, 3 phase, 3 wire 50Hz direct to
busbar and a separate permanent 230V, 1 phase, 50Hz supply, to all relevant IEE
regulations, British standards and IEC requirements

The control voltage to the interlocks is 24V, always size the low voltage interlock and
protection cabling for a maximum voltage drop of 2V

Avoid large voltage drops on cable runs, particularly low voltage wiring
The equipment contains live electrical and moving parts, ISOLATE prior to
maintenance or repair work.
A fused and isolated electrical supply of the appropriate phase, frequency and
voltage should be installed.
The unit isolators DO NOT isolate the incoming mains supply through busbars, but
isolate the individual electrical panels. Isolate REMOTELY the mains incoming
supply to the BUSBAR chamber prior to maintenance or repair work.
A separately fused, locally isolated, permanent single phase and neutral supply
MUST BE FITTED for the compressor oil heater, evaporator trace heating and
control circuits, FAILURE to do so will INVALIDATE WARRANTY.
CAUTION ALL work MUST be carried out by technically trained competent personnel.
The Emergency Stop MUST NOT be used to stop the chiller other than in the event
of an emergency.
Wires should be capable of carrying the maximum load current under non-fault
conditions at the stipulated voltage.
To reduce down time, if possible support the above supply with a UPS.
Ensure correct phase rotation.