13507
11 Commissioning - Nat. Gas (G20) to LPG (G31) Conversion
11.10 LPG CONVERSION - all models
NOTE: Steps 11.1 and 11.3 will need to be completed before
the appliance can be converted.
This conversion should only be carried out by a competent
person.
During the conversion to Propane use of a suitable flue gas
analyser is necessary.
As an option a chargeable boiler only commissioning service
can be provided by Glow-worm Service by calling telephone
No. 01773 828100.
Tools required to make the conversion are a 2mm Allen key
and an electricians screwdriver.
Ensure that the appliance supply pressure = 37mbar.
(1) Access the gas valve.
(2) Refer to diagram 11.5 and turn the gas valve throttle
fully clockwise.
(3) Turn the throttle anti-clockwise by the number of
turns shown in the table.
(4) Ensure that the gas analyser is set to the correct fuel
setting - Propane.
(5) Attach combustion analyser to the combustion test
point, refer diagram 12.10.
IMPORTANT:
Remember to replace the cap on
completion of the test.
(6) Turn on the mains electrical supply and turn on the gas
service isolation valve. Switch the boiler on.
(7) Ensure external controls are calling for heat (i.e,
generate a hot water demand by fully opening a hot
water tap. The boiler should fire automatically.
NOTE: If the appliance does not light & goes to lockout
(F1) turn the throttle anti-clockwise a further turn and
press the reset button. The appliance will (after
a short delay) again attempt to fire. Repeat this
procedure (up to a total of 2 extra turns on the throttle
screw) until the appliance lights. PLEASE NOTE several
ignition attempts may be needed, to purge gas through
the appliance, before a successful ignition is achieved.
(8) Check and adjust the burner %CO
2
at maximum rate.
Press the “reset” button on the controls fascia, release
and immediately press and hold in the “+” button.
After approximately 5 seconds “Hi” will be
displayed. Pressing the mode button when “Hi” is
selected will force the boiler to maximum rate,
the display will flash between “Hi” and the
“default display” this will indicate the boiler has been
forced to maximum.
(9) Adjust, if necessary, the burner % CO
2
to the value
shown in the “SETTING” column of the table, with the
throttle screw, see diagram 12.5(rotate anti-clockwise to
increase).
(10) To exit the check sequences press the “mode” and “+”
buttons simultaneously, this will reset the boiler to the
default display.
(11) Check the burner % CO
2
, at minimum rate, to the value
shown in the “SETTING” column of the table.
(12) If adjustment is required, press the “reset” button on
the controls fascia, release and immediately press and
hold in the “+” button. After approximately 5 seconds
“Hi” will be displayed. Pressing the “+” or “-” buttons
will cycle between “Hi” and “Lo”. Pressing the mode
button when “Lo” is selected will force the boiler to
minimum rate, the display will flash between “Lo” and
the “default display” this willindicate the boiler has been
forced to minimum.
Diagram 11.5
(13) Adjustment of the %CO
2
is very coarse so carefully
adjust the %CO
2
to the value shown in the “SETTING”
column of the table with the offset adjustment, see
diagram 12.5 and %CO
2
Table (Rotate clockwise to
increase).
(14) To exit the function press the “mode” and “+” buttons
simultaneously, this will reset the boiler to the default
display.
(15) Repeat (8) and check CO
2
at maximum rate - adjust if
necessary.
Please remember after finishing this procedure to turn
off the hot water tap.
(16) Remove analyser probe from the test point and replace
the cap. Refit the control panel.
(17) IMPORTANT: Fit the LPG conversion label supplied
in the documentation pack to the inner front panel
alongside the data label. Refit the inner door and
outer door.
(18) Continue commissioning from 11.6.
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