Dimplex LA 12 MI, Installation & Technical Manual

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Page 26
Connection of the power supply to the Heat pump
LA 6 and 9 MI LA 12 and 16 MI
Figure 21: Connection of the power supply cable
Main power supply cable
The power connection of the heat pump is made via a
standard 3-core cable. The cable has to be supplied by
the installer and the wire cross-section is to be
selected according to the power consumption of the
heat pump as shown in Table 14. Similarly, the main
circuit breaker (MCB) at the distribution board should
be correctly rated as shown in Table 2.
For maintenance purposes the power supply of the
heat pump must be equipped with an isolating device
in the vicinity of the heat pump. The isolating device
must have a contact gap of at least 3mm. In addition to
the maintenance isolator an automatic 2-pole
automatic circuit breaker should be installed.
The maximum current carried in the supply cable must
be calculated using Table 2 depending upon the how
the heat pump is configured. For example, it is not
always necessary to connect the inline flow boiler. In
other installations where there is no DHW cylinder is
not necessary to connection the DHW immersion.
Every installation will require power to RCCD 1
(compressor and control circuits).
Once the maximum supply current is known the
installer must then supply a suitably rated cable
depending upon the run length and the type of
environment where it will pass.
The heat pump should only be
connected to a permanent mains supply.