Table of Contents
Advertisement
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.
Meter
Natural Gas
< 2.5mbar
difference
19 - 23 mbar
Boiler inlet
1 mbar
drop
18 - 22 mbar
Fig. 49 Natural gas pressures
Regulator
L.P.G.
< 4.0mbar
difference
32 - 45 mbar
Boiler inlet
2.5 mbar
drop
29.5 - 42.5 mbar
Fig. 50 L.P.G. pressures
NOTICE:
Do not continue commissioning until the correct gas
pressure is achieved.
Greenstar Ri Compact
ErP
6720813282 (2015/07)
6.5.2
▶ The gas rate should be measured at the gas meter after 10 minutes
▶ Set the boiler to maximum output (refer to section 6.4.1)
▶ Where a gas meter is not available (e.g. L.P.G.) the CO/CO
6.5.3
▶ Isolate all other appliances.
Gas Control
▶ Set the boiler to maximum output (refer to section 6.4.1).
valve
▶ Ensure that there is no modulating of the fan/gas valve.
▶ Carry out Gas rating procedures as described in "Essential Gas
6.5.4
▶ Use an approved leak detector to check all connections for possible
16.5 - 20.5 mbar
▶ Do not allow the product to come into contact with electrical wiring.
1.5 mbar
drop
6720644744-44.2Wo
Gas Control
valve
28 - 41 mbar
1.5 mbar
drop
6720644744-45.2Wo
Checking the gas rate and pressure
operation at maximum output.
See Technical data section on page 9 of this manual.
checked to the units shown in the setting of the air/gas ratio.
Gas rating test
Safety" third edition on pages 169 to 176.
Checking for leaks during operation
leaks. The product must be certified as a gas leak testing agent.
COMMISSIONING
must be
2
33
Advertisement
Table of Contents
