Glow-worm Ultracom sxi - Manual (Page 40)

40
12.9 LPG CONVERSION - all models
As an option, a chargeable boiler only commissioning service
can be provided by Glow-worm Service by calling telephone
No. 01773 828100.
NOTE: Steps 12.1 and 12.3 will need to be completed before
the appliance can be converted.
This conversion should only be carried out by a
competent
person approved at the time by the Health and Safety
Executive.
During the conversion to Propane use of a suitable flue gas
analyser is necessary.
● The person carrying out a combustion measurement should
have been assessed as competent in the use of a flue gas
analyser and the interpretation of the results.
● The flue gas analyser used should be one meeting the
requirements of BS7927 or BS-EN50379-3 and be calibrated
in accordance with the analyser manufacturers’ requirements.
● Competence can be demonstrated by satisfactory
completion of the CPA1 ACS assessment, which covers
the use of electronic portable combustion gas analysers in
accordance with BS 7967, parts 1 to 4.
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 12.5 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 13.1.
IMPORTANT: Remember to replace the cap on
completion of the test.
(6) Make sure that the external controls are calling for heat,
then turn the mains electrical supply and gas service
isolation valve on.
(7) Switch the boiler on. The boiler should fire automatically.
NOTE: If the appliance does not light and 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. Several ignition attempts may be
needed, to purge gas through the appliance, before a
successful ignition is achieved.
(8) Check and adjust the burner %CO2 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.
12 Commissioning - Nat. Gas (G20) to LPG (G31) Conversion
OFFSET
ADJUSTMENT
THROTTLE
ELECTRICAL
PLUG
GAS PIPE
RETAINING
CLIP
SEALING
GROMMET
13553
Diagram 12.5
13870
(9) If necessary, adjust the burner % CO2 to the value shown
in the “SETTING” column of the table, by turning the
throttle screw (anti- clockwise to increase), see diagram
12.5 no more than 1/8 of a turn, waiting a minute to allow
for the appliance to stabilise before checking or making
further adjustments.
(10) Exit the check sequences press the “mode” and “+”
buttons simultaneously, this will reset the boiler to the
default display.
(11) Check the burner % CO2 , 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 will indicate the boiler has been forced to minimum.
(13) Adjustment of the %CO2 is very coarse so carefully adjust
the %CO2 to the value shown in the “SETTING” column
of the table with the offset adjustment, see diagram 12.5
and %CO2 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 CO2 at maximum rate - adjust if
necessary. Check that the CO/CO2 ratio is less than the
value in the table below.
(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 12.4.