User manual

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.
See index.
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. Code plug
Code plugs
With internal diverter valve:
12kW NG - 112
12kW LPG - 113
With external diverter valve:
12kW NG - 108
12kW LPG - 109
2.1 Remove 3 screws (B) retaining plastic
cover at rear of control box and remove.
2.2 Replace code plug (C) with new one
supplied with conversion kit.
 Replace plastic cover.
 Place control in normal position and secure
with screw.
1.1
1.2
A
ISOLATE MAINS ELECTRICAL
SUPPLY AND REMOVE OUTER CASE
AS SHOWN ON PAGE 41.
THE GAS / AIR RATIO MUST BE
RESET AFTER CONVERSION. THE
PROCEDURE CAN BE FOUND IN
THE REPLACEMENT PARTS SECTION
OF THIS MANUAL.
2.1 2.2
B
C
B
GAS CONVERSION. 12kW ONLY
THE CONVERSION MUST BE CARRIED OUT
BY A COMPETENT PERSON. IT 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.
L.P.G CONVERSION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i System/24i System
8 716 107 375b (11/05)
53
CONVERSION
KITS