Publication No. 5105703
21
Commissioning
Important
When checking for gas soundness open
all windows and doors in the room.
Extinguish all naked lights, cigarettes, pipes, etc.
Important
The commissioning and boiler adjustment must
only be carried out by a suitably qualified
personnel. Potterton offer this service on a
chargeable basis.
3. Commissioning
Open Vented Systems
Remove the pump and flush out the system thoroughly
with cold water. Refit the pump. Fill and vent the system.
Examine for leaks.
Sealed Systems
Note: The system can be filled using a sealed system
filler pump with a break tank or by any other method
approved by the Local Water Authority. Refer to ‘The
System’, Section 1.9, Page 9 in these instructions, also
BS6798: 1987.
Remove pump and flush out the system thoroughly with
cold water. Refit the pump. Fill and vent the system until
the pressure gauge registers 1.5 bar (21.5 Ib/in²).
Examine for leaks.
IMPORTANT: The pressure relief valve is factory tested
and does not need testing during the commissioning of
the boiler. It must not be used to reduce system
pressure as it may cause debris in the system to foul the
valve.
All Systems
Refit the fan assembly and reconnect the fan supply
leads, (polarity of the fan leads is not important).
The whole of the gas installation including the meter
should be inspected and tested for soundness and
purged in accordance with the recommendations of
BS6891.
Test pilot unions for gas soundness as follows: Turn
boiler thermostat to the ‘0’ position.
Unplug the gas control valve supply lead from the
control box and plug it into the test socket adjacent to
the boiler thermostat knob, see Fig. 24.
Turn on gas at the gas service cock.
Ensure that the time control if fitted is in an ON
condition, and that the room and/or cylinder thermostats
where fitted are set to high temperatures.
Switch on the external electricity supply to the boiler.
Gas will flow to the pilot only. It will not be ignited as the
ignition system is de-energised.
Using a leak detection fluid, check pilot unions for gas
soundness.
Turn off the external electricity supply and gas service
cock.
Remove gas control valve plug from the test socket and
refit the plug into the socket on the left hand side of the
control box see Fig. 24.
Refit the combustion chamber front panel.
Fit the case door into position by lifting it onto the top
hinge brackets and secure it with the lower two fixing
screws. ENSURE THAT A GOOD SEAL IS OBTAINED
Remove the temporary label from the front of the casing,
having checked compliance with the information it
contains.
First Lighting
Warning: Before lighting the boiler, ensure that the
CASE DOOR HAS BEEN CORRECTLY FITTED and
that the sealing strip fitted to the case door is forming a
tight seal with the main boiler casing. Before proceeding
to light the boiler, check that the external electricity
supply to the boiler is switched off and that the boiler
thermostat is in the ‘0’ position.
Turn on the gas service cock, ensure that the pump and
radiator isolating valves are open, ensure that the time
control, if fitted is in an on condition, and that the room
and/or cylinder thermostats, where fitted are set to high
temperatures.
Switch on the external electricity supply to the boiler.
In the event of an electrical fault after installation of the
appliance, preliminary electrical system checks must
be carried out i.e.:-
A. Earth Continuity
B. Short Circuit
C. Polarity
D. Resistance to Earth
