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
Domest ic Propane Gas Burning
Installations.
All conversions will require the air gas ratio to
be set correct ly for t he 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. Gas valve
Isolate gas supply at boiler gas cock.
2.1
Remove wire clip from gas valve outlet then
pull gas adjustment assembly free from
plastic connector and pull forward clear of
case.
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. Gas adjuster
Twist retaining clip (C) to release then
remove clip and tube.
Refit new adjuster and secure with clip.
Coloured red for LPG or black for NG.
4. Code plug
4.1
Remove 3 screws (D) retaining plastic
cover at rear of control box and remove.
4.2
Replace code plug (E) with new one
supplied with conversion kit.
Replace plastic cover.
Place control in normal position and secure
with screw.
1.1
1.2
A
2.2
2.3
2.1
3
C
B
TH E GAS / AI R R ATI O M U ST B E
R ESET AFTE R CONVE R SION. TH E
P R O C E D U R E C AN B E F O U N D I N
THE REPLACEMENT PARTS SECTION
OF THIS MANUAL.
4.1
4.2
D
E
D
GAS CONVERSION. 24kW ONLY
THE CONVERSION MUST BE CARRIED OUT
BY A COM PETE NT PE R SON. IT M UST
NOT
B E AT T E M P T E D U N L E S S T H E P E R S O N
C A R R Y I N G O U T T H E C O N V E R S I O N I S
EQUIPPED WITH A COMBUSTION ANALYSER
C O N F O R M I N G TO B S 79 2 7 A N D I S
COMPETENT IN ITS USE.
L.P.G CONVERSION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
54
C
O
NVE
R
S
IO
N
K
ITS
Code plugs
With internal diverter valve:
24kW NG
-
114
24kW LPG
-
115
With external diverter valve:
24kW NG
-
110
24kW LPG
-
111
I S O LATE MAI N S E LE CTR I C AL
SUPPLY AND REMOVE OUTER CASE
AS SHOWN ON PAGE 41.
