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5.2 Heat pump operation
Prior to use: -
i.
Turn off the power supply at the local isolator
ii.
Remove the door by turning the lock with a screwdriver, opening and lifting off.
iii.
Check that the ground pressure gauge reads at least 1.8 bar. If the pressure is lower than this,
increase the pressure until the gauge reads at least 1.8 bar, at which point a "click" will be heard.
iv.
Check that the heating distribution system pressure gauge reads at least 1.8bar. If the pressure is
lower than this, find the mains cold water supply valve and pressurize the system until the gauge
reads at least 1.8 bar, at which point a "click" will be heard. Close the mains cold water supply valve
fully.
v.
Turn on the power supply at the local isolator and program the external BMS/timeclock / thermo-
stat.
5.3 Turning the heat pump on for the first time.
1.
The commissioning of the heat pump should be carried out by a Kensa commissioning engineer and
a heat pump commissioning certificate and report issued on completion. Please contact Kensa
Heat Pumps to book a commissioning visit.
2.
Turn the power on to the heat pump.
3.
Turn the 6 Amp MCB on to enable the controls to operate. The external water pumps should be con-
trolled via the ground pump relay within the heat pump or BMS system, however it is important that
an interlock is wired into the system to avoid the compressor running when the water pumps are
not operational. Shortly after operating this MCB, the compressor contactor should engage. DO
NOT operate the compressor MCB until Kensa Heat Pumps has been contacted and flow has been
confirmed around the system. Failure to do this may cause the unit to freeze and will invalidate
the warranty.
4.
The controller display will read the temperature of the water returning from the heating system. If
the error Tp is displayed, then the heat pump will not run until both heating distribution and ground
circuits are above 1.8 bar pressure.
Plant Room Heat Pump Manual Version 11.1
Page 24 of 34
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