36
CAUTION: For safety reasons, if the heat pump pressure exceeds 38 bar/temperature exceeds 60°C,
the commissioning will be aborted. Under these conditions, measures should be taken to allow the
temperature to drop below 60°C, i.e. a zone should be opened.
4.4.7 DHW set-up
Before commissioning the DHW, a number of checks must be carried out, as
shown in gure 24. When you have ticked each box to conrm each DHW
check, Next will bring you back to the installer menu, where you can now select
Electrical Connections (DHW).
Figure 24: DHW set-up
NOTE: It is possible to use space heating without completing the DHW setup. This can be done by
selecting ‘N’ on the DHW setup screen where it asks if the cylinder is connected (see gure 24).
This may be necessary where the DHW is not yet connected or where the cylinder has not yet been lled.
When the cylinder is ready, it will be necessary to return to this step of the commissioning and select ‘Y’
instead for “Cylinder Connected?” to set up domestic hot water.
4.4.8 Electrical connections (DHW)
This menu provides a list of electrical connections that should be made prior to
commissioning the domestic hot water cylinder. You must check and conrm all
connections in order to make the DHW Test available in the installer menu.
The numbers listed on the LHS of the screen refer to the connections which are
labelled in the wiring diagrams included in this manual.
Figure 25: DHW electrical
connections
4.4.9 DHW Test
Before you run the DHW test, which consists of heating up the cylinder to maximum temperature from
the heat pump, you will be asked to check that the valve (gure 27) is in the DHW position (A position), as
shown on the screen in gure 26. Check that the red actuator marker changes to the correct position (the
default position is B).
NOTE: If the 3-port valve head is removed and the valve moved by hand, the valve must be power
cycled (switched off and on again) in order to ensure normal operation.
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