Chillers
LOGICOOL™
Chillers
35
Technical Manual : 6521355 V1.14.0 11/2016
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.
INTERCONNECTING WIRING
LCC20 - LCC40
L1
Mains incoming supply 400V/3PH/50Hz
(N2 only required with Power Meter Option)
L2
L3
N2
E
L4
Separate Permanent Supply 230V/1PH/50Hz
N1
E
2
External Trace Heating Connections
N
240V/500W max
502
Unit Remote On/Off
505
502
(1) (2) Evaporator Remote Pump Interlock 24VAC
Or
Evaporator Pump Water Flow Switch
506
573
Non-Critical
Alarm
Volt Free Common Alarm
574
Volt Free Alarm N/O
575
Volt Free Alarm N/C
576
Critical
Alarm
Volt Free Common Alarm
577
Volt Free Alarm N/O
578
Volt Free Alarm N/C
RX-/Tx-
RX+/Tx+
Network Connections
GND
CAUTION
(1) MUST be directly wired to the chiller to validate warranty.
(2) Not required with integral pump package fitted.
