COMMISSIONING
CDi Compact
ErP
- 6 720 813 276 (2015/07) 37
6.5 Commissioning
Having checked:
▶ That the boiler has been installed in accordance with the installation
instructions.
▶ The integrity of the flue system and flue seals.
6.5.1 Checking the gas inlet pressure
The inlet pressure to the appliance must be checked using the following
procedure:
MEASURING THE INLET PRESSURE
Fig. 56 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 5 seconds and the boiler
will ramp up to maximum output in approx. 30 to 35 seconds.
– The display will show the chimney sweep symbol and the word
MAX will flash.
Fig. 57 Setting boiler to maximum
▶ Check the gas supply working pressure at the gas valve conforms to
values shown in Fig. 58 or Fig. 59 .
▶ Press the button to return to normal operation.
▶ The boiler will run for 15 minutes in service mode and return to
normal if no other inputs are made.
After the tests are completed:
▶ Disconnect the manometer.
▶ Retighten, but do not overtighten the inlet pressure test point screw.
GAS PRESSURE WITHIN THE SYSTEM
Refer to the figures below for natural gas or L.P.G gas pressures.
The working pressure at the boiler must not be less than the working
pressure read at the meter minus 1mbar for natural gas or minus
2.5mbar for L.P.G.
The pressure drop from the meter to the gas valve must not be more than
2.5mbar for natural gas or 4mbar for L.P.G.
If the pressure drop is greater than shown below, then this would
indicate a problem with the supply pipe work which must be rectified.
Fig. 58 Natural gas pressures
Fig. 59 L.P.G. pressures
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.
6720646608-41.1Wo
1
ok
eco
reset
e
max
min
°C
°F
Max
6720646608-45.1Wo
°C
°F
Max
1.
1
≈≈
5 s5 s
NOTICE: Gas pressure
Do not continue commissioning until the correct gas
pressure is achieved.
Meter
Boiler inlet
Gas Control
valve
19 - 23 mbar
18 - 22 mbar
16.5 - 20.5 mbar
1 mbar
drop
1.5 mbar
drop
Natural Gas
< 2.5mbar
difference
6720644744-44.2Wo
Gas Control
valve
L.P.G.
< 4.0mbar
difference
Regulator
Boiler inlet
32 - 45 mbar
29.5 - 42.5 mbar
28 - 41 mbar
2.5 mbar
drop
1.5 mbar
drop
6720644744-45.2Wo
To Next Page
Loading...
