Commissioning; Checking The Gas Inlet Pressure - Worcester Greenstar CDi Compact Installation, Commissioning And Servicing Instructions

▶ As soon as an adjustment is made, the screen will light up and the
relevant information will be displayed.
SCREEN DISPLAY
All possible screen symbols
°C
°F
Alpha/Numerical display
Text display
Hot water
Central Heating
Chimney sweep mode
Alert
Service mode
Burner on
Centigrade
°C
Confirmation
Table 14 Symbol description
STATUS CODES
Refer to section 7.5 for Status codes and Service menus.
These are not faults, but provide information concerning the current
status of the boiler.
During normal boiler operation various Status codes can be displayed by
pressing the button.
The first screen of the Information menu displays the current Status
code, this will change as the boiler runs through the various modes and
sequences.
6 720 803 800 (2012/11)
DESCRIPTION
This screen is displayed briefly
during boiler start up and shows
all the symbols that could be
displayed.
Displays a temperature or
boiler status code.
Displays PreHeat or Eco, or
diagnostic code
Displays this symbol during a
DHW demand.
Displays this symbol during a
CH demand.
Displays during service when
the boiler is set to maximum or
minimum output.
Displays with the boiler status
code and diagnostic code
during a fault condition.
Displays when a qualified
service engineer is in the
service menus.
The boiler is in operation and
the flame is alight.
Displays next to the
temperature reading.
This symbol confirms a manual
change.
5.5

COMMISSIONING

NOTICE: The combustion settings on this gas-fired
boiler have been checked, adjusted and preset at the
factory for operation on the gas type defined on the data
plate.
No measurement of the combustion values is necessary
provided there is a meter installed allowing the gas rate
to be checked.
DO NOT ADJUST THE AIR/GAS RATIO VALVE.
When running in the service 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 to run
water through the domestic hot water circuit to ensure
that the boiler will not cycle on low heating demands.
Having checked:
▶ That the boiler has been installed in accordance with the installation
instructions.
▶ The integrity of the flue system and flue seals.

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
1
Fig. 62 Inlet pressure test point
▶ Close gas isolation valve.
▶ At the inlet test point (1), slacken the screw for a maximum of half a
turn and connect a manometer.
It is important to use a screwdriver of the correct size, too small a
blade will damage the screw.
▶ Open the gas isolation valve.
▶ Measure the pressure with the boiler running at maximum.
– Press the and button for at least five seconds and the
eco
boiler will ramp up to maximum output in approximately 30 to 35
seconds.
– The display will show the chimney sweep symbol and the word MAX
will flash.
COMMISSIONING
33