BOILER CONNECTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
22
IN
ST
AL
LA
TI
O
N
BOILER CONNECTIONS
CAUTION: ISOLATE TH E MAI NS GAS
SUPPLY BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
A
B
C
22mm 22mm 22mm
5
D
F
GAS AND WATER CONNECTIONS:
A
- Flow (22mm),
B
- Return (22mm),
C
- Gas inlet (22mm).
5
. Lower the control panel into the service
position by removing the screw (D) from the
retaining bracket.
6
. Make connections to the heating system.
Connect the gas supply to the boiler gas
cock 22mm compression.
7
. Connect the expansion vessel flexible
pipe to the hydraulic manifold situated left of
the pump. It is necessary to remove and
discard the grey plastic blanking plug (E)
from the connection at the hydraulic
manifold before securing the expansion
vessel flexible pipe (F) in place with the wire
retaining clip (G).
8
. Connect the pressure relief drain pipe to
15mm compression joint (H) using the nut
and olive supplied in the hardware literature
pack.
6
7
F
A C
B
E
G
G
F
H
A
B
