ULTIMA FREECOOL
Chillers
Chillers
18
Installation & Maintenance Manual : 903-125 IM E 05/04/A
Installation Data
ELECTRICAL DATA
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.
•
Ensure correct phase rotation.
CAUTION
•
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.
•
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.
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.
CAUTION
The Emergency Stop MUST NOT be used to stop the chiller other than in the event
of an emergency.
Interlocks & Protection
Always electrically interlock the operation of the chiller with the pump controls for safety
reasons.
Failure to do this will invalidate the chiller warranty.
Do not rely solely on the BMS to protect the chiller against low flow conditions.
CAUTION
An evaporator pump interlock MUST be directly wired to the chiller, refer to
diagram.
