CONVERSION
KITS
LPG CONVERSION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 25Si/30Si
8 716 115 165a (06/2008)
1.1 1.2
A
2.1
THE AIR / GAS RATIO MUST BE
RESET AFTER CONVERSION. THE
PROCEDURE CAN BE FOUND IN
SETTING THE AIR/GAS RATIO
SECTION OF THIS MANUAL.
3.1 3.2
D
E
A
L. P. G. CONVERSION
Important: The appliance shall not be installed
into a room or internal space below ground
level when it is intended for use with LPG
(propane - G31). This does not preclude the
installation into a room or space which is a
basement on one side of the building but open
to ground on the opposite side.
Installation Regulations
In addition to those specified in the main
booklet the following standard applies when
converting to an LPG appliance: BS 5842
Domestic Propane Gas Burning
Installations.
All conversions will require the air gas ratio to
be set correctly for the gas used. The
procedure for setting the air gas ratio is at
the rear of these instructions.
1. Moving boiler control to service
position
Remove boiler case, as described on page 36.
1.1 Remove screw (A) from retaining bracket.
1.2 Lower control panel into service position.
2. Gas valve
Isolate gas supply at boiler gas cock.
2.1 Remove wire clip from gas valve outlet then
pull valve outlet elbow free from gas valve.
2.2 Undo bottom gas connection to gas valve.
2.3 Undo two securing screws (B) on the
underside of casing.
Pull valve up and forward out of boiler.
Disconnect electrical connections.
Fit plastic retaining nut to the outlet of the
gas valve from the kit and hand tighten.
Replace valve with new seals.
Check for gas soundness.
3. Code plug
3.1 Remove 3 screws (D) retaining plastic
cover at rear of control box and remove.
3.2 Replace code plug (E) with new one
supplied with conversion kit.
Replace plastic cover.
Place control in normal position and secure
with screw.
ISOLATE MAINS ELECTRICAL
SUPPLY AND REMOVE OUTER CASE
AS SHOWN IN THE INSTALLATION,
COMMISSIONING & SERVICING
INSTRUCTIONS
2.2
2.3
B
Code plugs
25kW NG - 104
25kW LPG - 105
30kW NG - 106
30kW LPG - 107
57
THE SETTING OF THE GAS RATIO MUST BE
CARRIED OUT BY A COMPETENT PERSON.
SETTING OF THE GAS RATIO MUST NOT BE
ATTEMPTED UNLESS THE PERSON
CARRYING OUT THE CONVERSION IS
EQUIPPED WITH A COMBUSTION ANALYSER
CONFORMING TO BS 7927 AND IS
COMPETENT IN ITS USE.
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