CAUTION: ISOLATE THE MAINS
SUPPLIES BEFORE STARTING ANY
WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS
1 Check that the service and water pipes are
connected to the correct position on the
manifold.
A - Flow (22mm)
B - CH Return (22mm)
C - Gas inlet (22mm)
D - Cylinder Return (15mm)
2 Check the gas type specified on the
identification plate (F) matches that of the
gas supply. Turn on the main gas supply,
check the gas pipework, connections and
rectify any leaks.
3 Check that the condensate pipe has been
connected to the syphon.
4 Check pressure relief drain pipe (H) is
correctly fitted and securely tightened.
IMPORTANT: If the boiler is not to be
commissioned immediately then:
after sucessfully completing all of the
checks and any rectification work,
close the gas and water valves, shut off
the gas supply, electrically isolate the
boiler and label appropriately.
C
2
3
F
H
PRE-COMMISSIONING
CHECKS
A
B
1
22mm 22mm 15mm 22mm
1
A C D B
PRE- COMMISSIONING CHECKS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
29
C
O
MMI
S
S
IO
N
IN
G
NOW R ETU R N TO TH E MAIN
I N STR UC TION S PAG E 30
( F I LLI NG TH E SYSTE M ) TO
CONTINUE INSTALLATION.
D
A
B
D
