COMMISSIONING
Greenstar FS CDi
ErP
6720818079 (2016/04)
24
Refer to manufacturers instructions when connecting external parts to
the wiring centre.
Worcester, Bosch Group cannot be held responsible for wiring errors.
Fig. 28 PCB connections
5
COMMISSIONING
5.1
Pre-commissioning checks
▶ Check that the service and water pipes are connected to the correct
valve on the manifold;
A - CH flow (28mm)
B - Gas inlet (22mm)
C - CH return (28mm)
▶ Check all system and boiler drain points [1] are closed.
▶ Check the gas type specified on the identification plate matches that
of the gas supply:
– Turn on the main gas supply and purge the gas supply [2] to the
boiler ensuring that the room is well ventilated.
– Test the gas supply for tightness as described in
BS 6891.
▶ Check the condensate pipe work [3] is correctly fitted and
connected.
▶ Check the flue [4] is correctly fitted and the connections are secure.
▶ Refit inner combustion cover [5] and secure with four screws [6].
Fig. 29 Pre-commissioning checks
5.2
Filling the system
▶ Open all the system and radiator valves.
▶ Turn on the water main stop cock.
Open vented system only
▶ Turn on the water to the system header tank and allow the system to
fill.
Sealed System
▶ Locate the pressure gauge externally on the system;
▶ Fill the system to 1 bar pressure via a WRAS approved filling link.
▶ Vent all radiators, retighten when completed.
▶ Check the system and rectify any leaks.
External diverter valve(s) and all other 230V parts are
not supplied with the boiler.
CAUTION:
ISOLATE THE MAINS SUPPLIES BEFORE
STARTING ANY WORK AND OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS.
E
EARTH =
LIVE =
NEUTRAL =
SWITCHED LIVE =
L
N
S
L
ST10
N
E
230V
N
S
N
L L
S
L
R
1.
6720648568-25.2W
o
ST10
ST6
ST8
ST25
ST19
ST25
CIRCULATING
PUMP
3.
L
Z
N
Z
L
N
E
High level
sensor
Condensate
pump
L
N
L
N
S
S
ST10
N
L
N
S
N
L L
S
L
R
E
E
Boiler demand
Wiring centre
10
20
25
30
15
M
M
EXTERNAL CONTROLS WIRING CENTRE
CONNECTION TO THE BOILER
2.
Do not
remove link
ST8
9 8
7
A
F
1
2
4
B
B
N
P
L
P
F
R
F
S
NOTICE:
If the boiler is not to be commissioned
immediately then:
after successfully completing all of the checks and any
rectification work, shut off the gas supply and
electrically isolate the boiler.
Complete the installation part of the Guarantee
Registration Card.
6720648568-26.1W
o
4
3
2
6
5
1
22mm
B
28mm
A
28mm
C
