Commissioning - Worcester GREENSTAR 25CDi GC Instruction Manual

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NOTE: When running in the central
heating boost mode, the boiler will
operate both the central heating and
the domestic hot water circuits. This
is to allow sufficient time for this part
of the commissioning procedure. It
will be necessary
through the domestic hot water cir ­
cuit to ensure that the boiler will not
cycle on low heating demands.
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to run water
COMMISSIONING
THE COMBUSTION FOR THE APPLIANCE
IS FACTORY SET.
NO ADJUSTMENT IS REQUIRED IF THE
GAS INLET PRESSURE IS CORRECT.
CHECKING GAS INLET PRESSURE:
The inlet pressure to the appliance must be
checked using the following procedure:
SETIING THE BOILER TO MAXIMUM:
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Press central heating boost button (L) for
ten seconds and set Central Heating tem ­
perature to ma)(imum.
• The central heating boost button will illumi­
nate continually.
MEASURING THE INLET PRESSURE:
2 ~ Slacken the screw in the inlet pressure
test point and connect a manometer.
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Measure the pressure with the boiler
running at maximum.
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Check the gas supply working pressure at
the gas valve inlet point:
N.G. minimum 18 mbar
L.P.G. 37 mbar
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The gas rate should be measured at the
gas meter after 10 minutes operation at
maximum. See technical data section at the
front of this manual.
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Ensure inlet pressure is satisfactory with
all other gas appliances working.
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Replace controls cover. NOTE: This boiler
is designed with a differential of 20"C
across the heating system.
I MPORTANT: Do not continue
commissioning until the correct
gas inlet pressure is achieved.
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If pressure is satisfactory press the central
heating boost button (L) again and the boil ­
er will return to normal operation.
• If left in the central heating boost mode the
control will return to normal operation after
15 minutes.
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Re-seal the screw in the gas inlet pressure
test point.
DOMESTIC HOT WATER:
Controlling the hot water temperature
• The hot water temperature can be set to
between approximately 40·C and 60·C
using the temperature control (G).
DOMESTIC HOT WATER PRE-HEAT:
Pre-heat reduces the time taken to produce hot
water at the tap and is controlled by the ECO
button (H).
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Press the ECO button to select either:
When the ECO button is not illuminated the
boiler will be in pre-heat mode (which will
reduce the time taken to produce hot water at
the tap).
OR
When the ECO button is illuminated the boiler
will be in Economy mode with pre-heat no
longer active.
A - On/off button
B - On/off and fault indicator (BLUE)
C - Central heating temperature control
D - Burner indicator (GREEN)
E • Reset button
F - Service button
G - DHW temperature control
H - ECO button
I - System pressure gauge
J . Cover or optional programmer with
intelligent functionality
K - Display
L - Central heating boost button
M - Holiday button
INSTALLATION
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SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
GREEN""'''~
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~ORCESTER
COMMISSIONING
6720 613 700a (2006111)
SOlIdI Group