BOILER CONNECTIONS
CAUTION: ISOLATE TH E MAI NS GAS
SUPPLY BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
A
B
BOILER CONNECTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
21
IN
ST
AL
LA
TI
O
N
Handling
Hole
Do not lift by the
air gas manifold.
3
C
1
4
2
Stop in
locked
position
GAS AND WATER CONNECTIONS:
Remove template and secure the wall mounting
frame to the wall with the fixings supplied.
System pipes may be run vertically upwards
behind the boiler or below it. See Plumbing
Manifold Section on page 15.
A
- Flow (22mm),
B
- Return (22mm),
C
- Gas inlet (22mm)
1
. Fit sealing washers to service valves
before hanging boiler.
IMPORTANT:
Before hanging the boiler onto the wall
mounting frame ensure that the pressure relief
valve connection is in the DOWN position. This
is located on the right hand side of the wall
frame at the rear.
2
. Pull the extended tab/lever forward and
down until there is no further travel.
3
. Hang the boiler on to the wall mounting
frame by the two brackets positioned left
and right at the top rear of the appliance.
Do not lift the appliance by the air gas
manifold. There are two handling holes
incorporated into the inner casing left and
right in the lower section of the appliance.
IMPORTANT:
The pressure relief connector must be
repositioned after the boiler has been correctly
mounted to the wall mounting frame.
4
. Push the lever on the pressure relief
connector
UP
until the stop on the inside of
the handle is over the shoulder of the metal
bracket to secure in place.
2 & 4
22mm
22mm 22mm
IMPORTANT: IF FITTING OPTIONAL
INTEGRAL DIVERTER VALVE
Disregard this and the following page and
refer to the correct version for installing
t he int egral divert er valve in t he
ADDITIONAL INFORMATION section at the
back of this book.
A
B
