COMMISSIONING
Greenstar Ri Compact 6 720 646 610 (2013/12)
30
5.5
COMMISSIONING
Check the following points, and then continue with the commissioning:
▶ That the boiler has been installed in accordance with the installation
instructions.
▶ The integrity of the flue system and flue seals.
▶ The integrity of the boiler combustion circuit and relevant 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
Fig. 55 Inlet pressure test point
▶ Close gas isolation valve.
▶ Slacken the screw in the inlet pressure test point (1) and connect a
manometer.
▶ Open gas isolation valve.
▶ Measure the pressure with the boiler running at maximum, refer to
section 5.4.1.
▶ Check the gas supply working pressure at the gas valve conforms to
values shown in Fig. 56 or Fig. 57 .
GAS PRESSURE WITHIN THE SYSTEM
Refer to the figures below for natural gas or L.P.G gas pressures.
The pressure at the boiler must not be less than the pressure read at the
meter less 1 mbar for natural gas and less 2.5mbar for L.P.G.
The pressure drop from the meter to the gas valve must not be more than
2.5 mbar for natural gas or more than 4 mbar for L.P.G.
If the pressure drops are greater than shown below, then this would
indicate a problem with the pipe work or connections within the system.
Fig. 56 Natural gas pressures
Fig. 57 L.P.G. pressures
5.5.2
CHECKING THE GAS RATE AND PRESSURE
▶ The gas rate should be measured at the gas meter after 10 minutes
operation at maximum output.
See Technical data section on page 8 of this manual.
▶ Set the boiler to maximum output (refer to section 5.4.1)
▶ Where a gas meter is not available (e.g. L.P.G.) the CO/CO
2
must be
checked to the units shown in the setting of the air/gas ratio.
5.5.3
GAS RATING TEST
▶ Isolate all other appliances.
▶ Set the boiler to maximum output (refer to section 5.4.1).
▶ Ensure that there is no modulating of the fan/gas valve.
▶ Carry out Gas rating procedures as described in “Essential Gas
Safety” third edition on pages 169 to 176.
5.5.4
CHECKING FOR LEAKS DURING OPERATION
▶ Use an approved leak detector to check all connections for possible
leaks. The product must be certified as a gas leak testing agent.
▶ Do not allow the product to come into contact with electrical wiring.
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.
NOTICE:
Inlet gas pressure
▶ Ensure that the inlet pressure is satisfactory with all
other gas appliances working.
6720646608-41.1W
o
1
NOTICE:
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
