Filling & Starting The Appliance; Running The Circulation Pumps - Potterton iHE 100 Installation & Servicing Instructions Manual

3.0 COMMISSIONING GENERAL
After installation of the pipework and fi ttings, open
the main water supply valve, fl ush the system and
fi ll the heater. The appliance can be commissioned
utilising the heating system or using the built-in hot
water store.
3.1 FILLING THE SYSTEM WITH
WATER
The heat engines and Low Loss Header (LLH) must
be completely full of water and without air. Failure
to remove air from the heat exchangers can lead to
permanent damage and failure of the appliance:
1. Connect a water supply to the fi ll point of the
appliance and fi ll with water. Do not exceed
3 bar as this will open the automatic pressure
relief valve.
2. Open the vents at the top of the main LLH and
smaller fl ow manifold. Close vents when all the
air has been expelled.
3. Starting from heat engine 1 (PCB1) and work-
ing downwards, run the fl ow pump (QX2) for
each heat engine. (See sections below - R
THE CIRCULATION PUMPS
sound of air has ceased and the pump is running
quietly.
4. When all heat engines pumps (QX2) have been
run to expel air, open the vent at the top of the
main LLH manifold only. Close vent when all the
air has been expelled.
5. Run the Primary pump (QX3) for the plate heat
exchanger, to remove all trapped air. (See sec-
tion below regarding running the appliance
pumps)
6. Reopen the LLH and Flow manifold vents to
remove remaining air.
7. Recommended fi ll pressures: Min 0.5mbar, Max
2.5mbar.
8. Check for leaks
F
ILLING THE TANK WITH WATER
1. Check that the tank drain connection is fi tted
and closed.
2. If the appliance is connected to a hot water
recirculation system, open the isolation valve
immediately before the connection point to the
tank.
3. Turn on the entire hot water draw off taps.
4. Turn on the cold water supply and fi ll the heater.
5. Close each hot water draw off tap when water is
discharged.
6. Run the Secondary pump (QX1) for the plate
heat exchanger, to remove all trapped air. (See
section below regarding running the appliance
pumps.
7. After initial fi lling, open each hot water draw
off tap in succession and check that all the air is
vented from the system.
8. Check for leaks.
iHE
UNNING
). Stop pump only when all
S
TARTING THE APPLIANCE
Turn on the switched spur supplying electricity to
the appliance.
Turn on the appliance. A green light within the
switch should illuminate to indicate that power
is now available to the appliance and the display
should then proceed with system start up checks.
When the appliance has fi nished these checks, it
should be displaying the default screen "Cascade
fl ow temperature". If this is not the case, press the
escape key until this message is displayed.
3.2 RUNNING THE CIRCULATION
PUMPS
( )
MANUAL METHOD
Each of the appliance pumps can be run without
a heating or hot water demand by performing the
following actions from the default screen:
1. Press "OK" button
2. Hold the Info button for more than 3 seconds
3. Select "commissioning" using scroll wheel,
press "OK"
4. Select "input/output test" using scroll wheel,
Press "OK"
5. Screen should be displaying "Relay test" and
"line 7700", Press "OK" and "no test" should
now be fl ashing.
6. Using the scroll wheel select the following:-
• QX1 – To run the two secondary pumps on
the tank side.
• QX2 – To run heat engine 1 fl ow pump
only (see point 9. for running QX2 on heat
engines 2 or 3).
• QX3 – To run the primary pump on the
LLH side
7. To stop the test function press "OK" until the
current test fl ashes, using the scroll wheel se-
lect "no test" and press "OK". (if the display has
returned to the default screen follows steps 1 –
6 before selecting "no test" and pressing "OK")
8. Press "Esc" twice to return to default screen
9. If you have purchased the special commis-
sioning tool (P/N 5141599) from Baxi, please
ignore steps 12 & 13.
10. In order to run QX2 on heat engines 2 or 3 it is
necessary to carry out the following:
11. Switch off the appliance.
12. Remove the two screws securing the metal
cover over the electronic control boards. Re-
move covering plate by lifting it upwards and
away.
13. Remove the ribbon cable connectors from each
of the AGU2.5 modules (fi g 5.1) and fi nally
unplug the end of the ribbon on PCB1 connec-
tion X50 (fi g 5.2)
29 GB/IE