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Precautions
This guide should be read and utilised in conjunction with the official published regulations and
codes of practice, be they local, national or international.
Each air conditioning system will have its own discrete power supply, with overload current
protection.
Install a multi-pole isolation switch (with 3mm separation) in the power supply circuit.
The current protective device will prevent and protect the supply cable against overcurrent.
The circuit protection must be selected having due regard to the compressor starting current, such
that the supply cables when sized correctly, are also protected.
The cable should be selected to match the nominal load of the system, in addition to the losses
associated with corrections for length, temperature, impedance, etc. In accordance with local
codes of practice.
Earth both the indoor and the outdoor units by attaching an Earth wire. Ensure this is carried out
according to National Wiring Regulations.
After having made the connection to the terminal board, secure the cables with a cable clamp.
Wiring for the power supply must be performed by a qualified electrical engineer or technician
only.
Do not allow the cables (used for the power supply and for wiring between the units) to come into
contact with valves or pipes not covered with insulators. Secure these cables to the parts of the
pipes with heat insulation fitted.
Use the Ø20mm knockouts provided on the units (except KH/KHR/K), to fit cable glands to hold
the cables securely at the point where they enter the electrical box or unit.
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Power Supply Specifications
Power Supply Wiring
For a 3-phase model (4 wires), connect the power wiring to the L
1
, L
2
, L
3
and N terminals on the
power supply terminal block of the outdoor unit. For a single phase model, connect the power
wiring to the L and N terminals (
see drawing below):
380/415V 50Hz
3 phase 4 wires
220/240V 50Hz
Single phase
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Models RAV-264AH8/A8, RAV-364AH8/A8, RAV-464AH8/A8 are equipped with a reverse phase
protector. If the compressor does not start, interchange phase L
2
with phase L
3
of the power supply.
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E
LECTRICAL
W
IRING
Main Circuit
Model (RAV–)
134AH/A
164AH/A
264AH/A
264AH8/A8 364AH8/A8 464AH8/A8
Power Supply
220/240V – 1PH – 50Hz
380/415V – 3PH – 50Hz
Starting current (A)
60
60
80
25
42
50
Running current (A)
10.7
11.1
14.8
4.7
6.8
8.5
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www.heronhill.co.uk
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