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11 Commissioning
11.1 Switching on First Time
IMPORTANT
BEFORE switching on power
supply to the heat pump and the
heating control system for the
first time the following
procedures MUST be carried out
in the order they appear, to
prevent damaging the internal
heat pump controller.
1. Ensure the external mains power
isolation switch is set to the 'OFF'
position.
2. Ensure the power supply to the
heating control system is isolated at
the fused isolator.
3. Disconnect the three control wires
(from terminals 1, 2 and 3 in the
heat pump) at terminals 8, 9 and 10
in the wiring centre – refer to either
Figure 8-12 or 8-13 as appropriate.
4. Switch on the power supply to the
heating control system at the fused
isolator.
5. Create a CH demand and HW
demand (if applicable) using the
timer/programmer.
6. Confirm the CH and HW motorised
valves have opened. You may need
to adjust the room thermostat
and/or cylinder thermostat to
achieve this.
IMPORTANT
When putting the heat pump into use for the first time, watch the refrigerant
pressure gauge on the side of the heat pump. The needle will rise over time when
the temperature of the refrigerant increases. However, if this happens very quickly
(e.g. rises into the yellow or red zone within 1 minute) then an air lock is present.
Switch off power to the heat pump immediately, and purge any remaining air from
the system.
IMPORTANT
Grant Aerona heat pumps should be stored and
transported in an upright position. If not, the heat
pump MUST be positioned in an upright position for
at least 4 hours before being operated.
7. At the wiring centre terminals,
confirm that:
•
there is NO voltage present at
terminals 8, 9 or 10 (refer to Figure
8-12 or 8-13 as appropriate)
•
there IS continuity between
terminals 8 & 9 for CH and also 8 &
10 for HW
IMPORTANT
If voltage (230Vac) is present at
terminals 8, 9 or 10, check the
wiring as shown in Figure 8-12
or 8-13 and correct as
necessary. These terminals
MUST be 'voltage free' or the
heat pump internal controller
will be damaged.
6.
Remove CH and HW demands.
7. Isolate the power supply to the
heating control system at the fused
isolator.
8. Re- connect the three control wires
(from terminals 1, 2 and 3 in the
heat pump) to terminals 8, 9 and 10
in the wiring centre – refer to either
Figure 8-12 or 8-13 as appropriate.
9. Switch on the power supply to the
heating control system at the fused
isolator.
10. Create a CH and HW demand
using the timer/programmer.
11. Confirm the CH and HW motorised
valves have opened.
12. Switch the external isolator to 'ON'.
13. Check power is established – the
ATC and BTC should now show
display default settings.
14. Using the ATC, set the heat pump
to 'Automatic'
and switch it
ON. Refer to Section 11.2 for
details.
15. Within 30 seconds, the circulating
pump and fan will start.
16. Within 60 seconds the compressor
will start.
17. Once the compressor has started,
pay attention to the pressure gauge
on the side of the heat pump. If the
pointer starts to rise quickly, (enters
the yellow or red zone within 30
seconds) switch off at the external
isolator and remove all air from the
system.
18. If the heat pump fails to start refer
to Section 13.1.
19. When satisfied that all air has been
expelled, start this process again
from step 12.
20. Remove demand for CH and HW.
21. Compressor and fan will stop.
22. Circulating pump will continue to
run for a period of time (as set on
the BTC.).
23. Set the ATC and BTC controls.
Refer to Sections 11.2 and 11.4
respectively.
29
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