Grant Products HPAW155 - Manual (Page 33)

Commissioning
29
11 Commissioning
11.1 Switching on First Time
When switching on for the first time
carry out the following procedures in
the order they appear.
1. Ensure the external mains power
isolation switch is set to the ‘OFF’
position.
2. Energise the heating system inside
the house.
3. Create a CH demand using the
timer/programmer.
4. Confirm the CH motorised valve
has opened. (You may need to
adjust the room thermostat to
achieve this).
5. At the heat pump control panel,
confirm there is no voltage present
between terminal 1 and 2 on the
S-Plan connections in the Heat
Pump control panel – check there is
continuity. If voltage is present
(230Vac), check the wiring as
shown on page 20 and correct as
necessary.
6. Remove CH demand.
7. Create a DHW demand (if
applicable) using the
timer/programmer.
8. Confirm the DHW motorised valve
has opened. (You may need to
adjust the cylinder thermostat to
achieve this).
9. At the heat pump control panel,
confirm there is no voltage present
between terminal 1 and 3 on the
S-Plan connections in the Heat
Pump control panel – check there is
continuity. If voltage is present
(230Vac), check the wiring as
shown on page 20 and correct as
necessary.
10. Create a CH and DHW demand
using the timer/programmer.
11. Confirm the CH and DHW
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. Set the ATC to automatic using the
‘M’ button, and the display will
show the return temperature.
15. Within 30 seconds, the circulating
pump will start.
16. Within 30 seconds the fan will start.
17. Within 60 seconds the compressor
will start.
18. 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.
19. When satisfied that all air has been
expelled, start this process again
from step 12.
20. Remove demand for CH and DHW.
21. Compressor and fan will stop.
22. Circulating pump will continue to
run for a period of time (default
setting in BTC.).
23. Set the ATC and BTC - details in
sections 11.2 and 11.3 respectively.
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.