Commissioning; Checking The Gas Inlet Pressure - Worcester GREENSTAR 35 CDi Installation, Commissioning And Servicing Instructions

COMMISSIONING

▶ The concentration level of inhibitor in the system
should be checked every 12 months or sooner if
system content is lost.
▶ The addition of sealing agents to the system water is
not recommended as this can cause problems with
deposits left in the heat exchanger.
WATER TREATMENT PRODUCTS
Suitable water treatment products can be obtained from the following
manufacturers:
FERNOX 0870 601 5000
www.fernox.com
SENTINEL 0800 389 4670
www.sentinel-solutions.net
Table 28
5.5 COMMISSIONING
When fitted with the optional diverter valve (not
supplied) and running in performance test mode, the
boiler will only operate the central heating circuits.
If fitted to an S or Y plan system, the system must only be
run in central heating mode.
This is to allow sufficient time for this part of the
commissioning procedure.
B
A
L
K
4
3
5
2
J
1 6
max
I
Fig. 48 Control panel
A On/off button
B Cover or position for optional plug-in control
C Display
D System pressure gauge
E Reset button
F ECO button (only with optional diverter valve)
G Holiday button (only with optional diverter valve)
H DHW temperature control (only with optional diverter valve)
I Central heating temperature control
J Performance test button
K Service button
L Burner indicator (GREEN)
M On/off and fault indicator (BLUE)
N Auto Air Vent
Table 29
32
C
2
1 1 3
0 4
bar
D
reset
eco
E
F
4
3
e
2
G
1 6
min max
H
M
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NOTICE: THE COMBUSTION FOR THE APPLIANCE IS
FACTORY SET.
NO ADJUSTMENT IS REQUIRED IF THE GAS INLET
PRESSURE IS CORRECT.

5.5.1 CHECKING THE GAS INLET PRESSURE

The inlet pressure to the appliance must be checked using the following
procedure:
MEASURING THE INLET PRESSURE
Inlet pressure
test point
Fig. 49 Inlet pressure test point
▶ Close gas isolation valve.
▶ Slacken the screw in the inlet pressure test point and connect a
manometer.
▶ Open gas isolation valve.
▶ Measure the pressure with the boiler running at maximum.
– Press Performance test button (J) for more than ten seconds and
set Central Heating temperature to maximum.
– The Performance test button (J) will illuminate continually and the
display (C) will alternate between
temperature.
▶ Check the gas supply working pressure at the gas valve conforms to
values shown in Fig. 50 or Fig. 51 .
Ensure inlet pressure is satisfactory with all other gas
appliances working.
NOTICE: Do not continue commissioning until the
correct gas inlet pressure is achieved.
▶ If the gas pressure is satisfactory, press the Performance test button
(J) again and the boiler will return to normal operation.
If left in Performance test mode, the control will return to normal
operation after 15 minutes.
▶ Close the gas isolation valve and remove the manometer.
▶ Re-seal the screw in the gas inlet pressure test point.
▶ Open the gas isolation valve and check for gas tightness.
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and the central heating flow
6 720 812 175 (2014/07)