ESP Varimax I ASHP, Installation And Operation Manual

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19 of 52
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PASRW040-D-BP

Check that all relevant lever valves are open.

Check the water loop and expansion tank to ensure that both
have adequate water in them to allow the system to operate
at 1 – 1.5 bar.

Ensure that all air has been purged from the system.

Ensure that pipes are well insulated using waterproof lagging,
with at least 30mm wall thickness.

Check the electrical wiring is correct in every respect. In
particular, make sure that the system is properly earthed.

Inspect the heat pump to ensure that all screws cover have
been replaced and secured properly.

Check that the fan rotates freely.

When you switch on the power to the unit at the rotary
isolation switch, check the controller on the unit casing to see
if there is an error code being displayed.
9.2
Switching on the Unit

Please familiarise yourself with the unit controller and the
instructions in section 10 so that you can check various
parameters as the unit starts.

Start the heat pump by pressing the " " key on the unit
controller (see section 10). This will start the water pump.
Check that the water pump is running - there should be a
reading of 0.2 MPa on the water pressure gauge.

When the water pump has been running for 1 minute, the