Commissioning - Worcester Greenstar 12i System Instruction Manual

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WHEN RUNNING IN SERVICE MODE
NOTE: When fitted with the optional
dlverter valve (not supplied) and
running In service mode, the boiler
will operate both central heating and
hot wat er circuits.
If fitted to an S or Y plan system, the
syst em must only be run in central
heating mode.
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COMMISSIONING
THE COM BUSTION FOR THE APPLIANCE
IS FACTORY SET.
NO ADJUSTMENT IS REQUIRED IF THE
GAS INLET PRESSURE I S CORRECT.
CHECKING GAS INLET PRESSURE:
The inlet pressure to
the
applianoe must be
checked u&ir\g the following procedure:
SETTING THE BOILER TO MAXIMUM:
1 Press servioe button (F) for 10 seconds and
set temperature to maximum.
The service button will illuminate continually
ond
the
blue
power
indicator
will flash quickly.
MEASURING THE INLET PRESSURE:
2 Slacken the screw in the inlet pressure test
point and connect a manometer.
• Measure the pressure with the boiler
running at maximum.
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Check
the gas
supply working pressure at
th&
gas va.!Ye inlet point:
N.G. 18.6 mbar {minimum)
L.P.G. 37
mbar (minimum}
• Th& gas rate s hould be measured at the
gas meter
alter
10
minutes opellltion at
maximum. See technical data section at the
front o f this manual.
• Ensure inlet pressure is satisfactory with all
other gas appliances worf<ing.
• Replace controls cover.
NOTE:
This boiler is
d esigned with a differential o f 2CfC across
the heating system.
I MPO RTANT: Do not continue
commissioning until the correct
gas pressure is achieved.
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pressure is satisfactory
press
the
service button (F) again and the boiler
will
return to normal operation.
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PRETTL VALVE
Inlet Test Nipple
S IT VALVE
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COMMISSIONING
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A · On/off button
B · On/off and laull indicator (BLUE)
C • Central heating temperature control
0 ·Butner indicat01 (GREEN)
E · Reset button
F •
Servioe
button
G
· Not used
H • System pressure gauge
I · Cover or optional programmer
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DUNGS VALVE
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Inlet T est Nipple
H left
in the
service
mode the
control will
retwn to normal operation after 15 minutes.
• Re-seat the screw
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t he gas inlet pressure
test point.
IN5W..LN10N & SERVICING INSTRUCflc:NS FORWORCEStat GReENST AA 121 S;~~~ Spk<l'l
8 71 6
112~l)W"OO)
r woRCESTER