User`s guide

Page 26
Section 8: Setting the system to work
After completing the heating system and electrical
connections the following procedure should be followed
to set the system to work.
Hydraulic circuit
1. After flushing and filling the heating circuit check the
air bleed points to release any air. Top up system if
pressure drops below 0.8 bar.
Once the heat pump starts to operate more air may
be pushed around the circuit so this process will
need to be repeated.
Heat pump
1. Check the operation of pressure relief valve by
using the lever as shown in Figure 11 ensuring that
it re-seats after operation.
2. Check the circulation pump is on speed 3.
3. Ensure that the override levers on the 2 x two port
valves are in the Auto position and the insert guide
is removed.
4. Ensure all of the necessary RCCD‟s are in the ON
position with the red indicator showing and then turn
on the power supply to the heat pump at the
distribution board.
5. Check the operation of the RCCD by using the test
button and return them to the ON position.
6. Set up the controller as described in section 10
using the suggested settings shown in Table 3.
7. Check the controller is not in “Quiet” mode as this
will reduce the heat pumps kW output and increase
heat up times.
8. Place the controller in TANK mode.
9. Activate the heat pump by pressing the OFF / ON
button on the controller.
10. Check the 2 port valve is directing the heating water
into the top of the cylinder coil.
11. Check the water flow rate on the Taconova unit is
within the correct limits. Adjust the circulation pump
if necessary.
12. Check that the heat pump is able to achieve the
correct temperature in the DHW cylinder by reading
the sensor using the heat pump controller.
13. When the DHW demand is fulfilled check the 2 port
valve switches across to heating when de-
energised.
14. Switch the controller on to HEAT mode. If the
outdoor temperature is higher than the HEAT OFF
temperature (default 18C) the heat pump will not go
into heating mode. Raise the HEAT OFF
temperature if necessary.
15. Turn the Horstmann wall thermostat into standby
mode. Check that the green light is on the heat
pump controller and verify that the heat pump does
not start.
16. Turn on the Horstmann room thermostat to create a
heating demand.
17. Allow the system to come up to temperature and
check all the plumbing joints for leaks.
18. Verify the flow rate using the Taconova flow setter
and increase the pump speed upwards if necessary.
Do not decrease the flow rate because this would
decrease the flow rate during DHW production.
19. Set up the Horstmann PRT1 room thermostat for
the correct user profile as stated in the installation
instructions.
20. Check the strainer filter for any debris and clean as
required.
21. If an extended warranty is required contact the
Dimplex after sales department for the correct form.
22. Explain the system to the occupants and leave this
manual and the User guide with them.
The system should be inspected for the
extended warranty two weeks after the
system has been set to work.
Do not run the heat pump without the top
cover fixed in place because is a vital part
for structural rigidity.