Airedale Ultima Compact Condensing Unit 30kW - 450kW - Manual (Page 34)

ULTIMA COMPACT Condensing Units
34
Condensers & Condensing Units
Technical Manual : Part No 904-047 V1.4.0_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.

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.
CAUTION A separately fused, locally isolated, permanent single phase and neutral supply
MUST BE FITTED for the compressor sump heater and control circuits, FAILURE to
do so could INVALIDATE WARRANTY.