Airedale OptiChill FreeCool 500kW - 1365kW - Manual (Page 30)

OPTICHILL Chillers
30
Chillers
Installation & Maintenance : 6564868 02/2013
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

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

Once the connecting pipework is complete the electrical supply can be connected by
routing the cable through the appropriate casing hole and connecting the cables,
refer to the Wiring Diagram supplied with each unit
The equipment contains live electrical and moving parts, ISOLATE prior to
maintenance or repair work.
The unit isolators DO NOT isolate the incoming mains supply, but isolate the
individual electrical panels. Isolate REMOTELY the mains incoming supply to the
BUSBAR chamber prior to maintenance or repair work.
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.
A fused and isolated electrical supply of the appropriate phase, frequency and
voltage should be installed.
Wires should be capable of carrying the maximum load current under non-fault
conditions at the stipulated voltage.
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.
To reduce down time, if possible support the above supply with a UPS.
Ensure correct phase rotation.
Refer also to Interlocks & Protection , on page 25.