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Fig. 41
Working Gas Pressures
If the pressure drops are
greater than shown a problem
with the pipework or
connections is indicated.
Permissible pressure drop
across this system ≤ 1 mbar.
Changing the Gas Type
1. It may be necessary to adjust the boiler gas type if the supply is changed, for example
when Natural Gas is provided to a rural area previously reliant on Propane. In these
instances a replacement Gas Type Label may be required, which is available on request
as a spare part.
2. Press
&
and hold for at least 6 seconds.
alternating with
.
3. Press
to select the next parameter
4. Press
or
to select the value that corresponds with the required
gas type. For Natural Gas:-
For Propane:-
5. Press
to save the change, then
30
© Baxi Heating UK Ltd 2017
DO NOT check
gas pressure here
Inlet Gas Pressure
Test Point
Gas Valve
Gas Cock
19-23 mbar
Gas Meter
will be displayed,
. Press
.
to return to the normal display.
R
10.0 Commissioning
10.3
Check the Operational (Working) Gas Inlet
Pressure & Gas Rate
Note: The system MUST be cold to ensure the boiler is
operating under full demand. To obtain an accurate
measurement on smaller capacity systems it may be
necessary to open one or more hot taps in order to
maintain the boiler at full rate
1. Press
&
'On'
seconds.
will be displayed briefly, followed by
'100'
then
when the boiler is lit, indicating the CH output is
at MAXIMUM ('Chimney Sweep Function').
2. With the boiler operating in the maximum rate condition
check that the operational (working) gas pressure at the inlet
gas pressure test point on the gas cock or valve is in
accordance with B.S. 6798 & B.S. 6891. This must be AT
LEAST 17mb ! (LPG - 37mb)
Fig. 40
3. Ensure that this inlet pressure can be obtained with all other
gas appliances in the property working.
Measure the Gas Rate
4. With any other appliances & pilot lights turned OFF the gas
rate can be measured. It should be:-
Natural Gas
17-21 mbar
Propane
5. Press
&
18-22 mbar
seconds to exit the function.
6. Carefully read and complete all sections of the Benchmark
Commissioning Checklist at the rear of this publication that are
relevant to the boiler and installation. These details will be
required in the event of any warranty work. The publication
must be handed to the user for safe keeping and each
subsequent regular service visit recorded.
7. For IE, it is necessary to complete a "Declaration of
Conformity" to indicate compliance with I.S. 813. An example
of this is given in I.S. 813 "Domestic Gas Installations". This is in
addition to the Benchmark Commissioning Checklist.
Gas Type Label
N.G. Factory
Set
When reset for L.P.G.
together and hold for at least 6
24 model 2.61
m
/h
3
m
/h
28 model 3.05
3
24 model 1.94 kg/h
28 model 2.29 kg/h
together and hold for at least 6
'304'
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