Airedale LogiCool FreeCool 40kW - Manual (Page 37)

Chillers LOGICOOL
™
Chillers
37
Technical Manual : 6521355 V1.8.0 07/2014
Installation Data
ELECTRICAL
CAUTION ALL work MUST be carried out by technically trained competent personnel.
The equipment contains live electrical and moving parts, ISOLATE prior to
maintenance or repair work.
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
CAUTION 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 (if fitted), evaporator trace heating
and control circuits, FAILURE to do so could INVALIDATE WARRANTY.
Interlocks & Protection Always electrically interlock the operation of the chiller with the pump controls for
safety reasons.
CAUTION Do not rely solely on the BMS to protect the chiller against low flow conditions.
If a pump package is not selected as part of the unit, an evaporator pump interlock
MUST be directly wired to the chiller, to
Interconnecting Wiring diagram. Failure to comply will invalidate the chiller
warranty.