Section 4 - Installation
INSTALLATION
37
Installation and Maintenance
4.1.9 Electrical Installation
ᘐ WARNING: The product contains the hydrocarbon
refrigerant R290 which is very ammable. The refrigerant
may mix with air to form a ammable atmosphere
increasing the risk of re and/or explosion. Work that
requires the removal of the exterior casing of the Heat
Pump must only be carried out by competent persons
who are familiar with the risks of R290 refrigerant. Work
done on the heat pump should be done in accordance
with industry standard safety procedures and practices
for working with hydrocarbons.
ᘐ WARNING: All electrical work is to be undertaken
by a competent electrician. The electrical supply is to be
switched o with appropriate safety measures in place to
prevent accidental activation. The electrical installation
must be done on the Heat Pump rst and connection to
the supply must be the last connection made to reduce
risk of electric shock.
The electrical installation is only to be undertaken once all
other installation operations prior to this section have been
completed.
Electrical installations must comply with the requirements and
guidance of the IET Wiring Regulations BS 7671, and these
guidelines are to be used to determine the cross-sectional
area of the electrical cable.
The electrical installation must be installed in accordance with
ᘐ CAUTION: Incorrect installation of the electrical
supply can lead to the destruction of the electrical
components in the heat pump and any other unit that it is
connected to.
The heat pump is to be supplied directly from the consumer
unit using protected cable via a dedicated rotary isolator.
The heat pump supply line must not contain a plug-type
connection.
The electrical supply for the outdoor unit is to be taken from a
type B or F RCD (residual current device) protected circuit and
must have a Type-C bipolar cut-out device (circuit-breaker,
fuse) compliant with the local installations rules in force
There is to be an isolation switch, that when operated will
ᘐ WARNING: This product must be earthed, and
it must not be possible to disconnect the protective
conductor through any isolator switches.
The system requires dedicated 230 Vac power supplies for
above.
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