Worcester GREENSTAR 12i Instruction Manual page 65

Remove control retaining
screw
A
10
A C
22mm 22mm 15mm
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 12i/24i System
8 716 115 167b (03/2009)
A
C
D
D B
22mm
9
D
B
F
H
E
B
G
F
G
BOILER CONNECTIONS
CAUTION: ISOLATE TH E MAI NS GAS
SUPPLY BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY
PRECAUTIONS.
GAS AND WATER CONNECTIONS:
A - Flow (22mm),
B - CH return (22mm),
C - Gas inlet (22mm),
D - Cylinder return (15mm).
9. Lower the control panel into the service
position by removing the screw from the
retaining bracket.
10. Make connections to the heating system.
Connect the gas supply to the boiler gas
cock 22mm compression.
11. Connect the expansion vessel flexible
pipe to the hydraulic manifold situated left of
the pump. It is necessary to remove and
discard the plastic blanking plug (E) from
the pressure vessel connection at the
hydraulic manifold before securing the
expansion vessel flexible pipe (F) in place
with the wire retaining clip (G).
12. Connect the pressure relief drain pipe to
15mm compression joint (H) using the nut
and olive supplied in the hardware literature
pack.
NOW R ETU R N TO TH E MAIN
INSTRUCTIONS PAGE 25 (FLUE
INSTALLATION) TO CONTINUE
INSTALLATION.
11
BOILER CONNECTIONS
24