Checking The Gas Supply Pressure; Checking The Inlet Pressure; Lighting The Boiler - Biasi Advance Plus 25C ERP User Manual And Installation Instructions

7.7 Checking the gas supply
pressure
This boiler has been factory tested to
the highest quality control standards
and set for the minimum and maximum
gas working pressures, connected to a
1 m flue and a gas supply pressure of
20 mbar.
Any variation in gas supply pressure or
flue length may result in the customer
experiencing a harmonic noise from the
boiler. In these circumstances, it may be
necessary to reset the burner gas pres-
sures in accordance with section 11 Gas
Valve of the Service Manual.
It should be noted that a Flue Gas Ana-
lyser is required for this procedure.
7.8

Checking the inlet pressure

• Remove the boiler body's front panel, see
section "Dismantling the external panels"
to page 76.
• When the boiler is switched off (out of or-
der), check the supply pressure by using
the 30 point in Fig. 7.9 and compare the
value read with that reported on the Gas
supply pressure table in the "Technical
Data" section (pag. 26 Advance Plus 25C
ERP, pag. 30 Advance Plus 30C ERP and
pag. 34 Advance Plus 35C ERP).
• Close well the pressure point 30 in Fig.
7.9.
COMMISSIONING
A
B
30
Fig. 7.9
If it does not comply with the required pres-
sure check the gas supply line and governor
for faults and/or correct adjustment.
Where the boiler is connected to a gas
supply which has a zero set governor
then it is necessary under the Gas Safe
(Installation and Use) Regulations 26.9.
to perform a combustion analysis test
for CO/CO
given in "Technical Data" section pag. 26
Advance Plus 25C ERP, pag. 30 Advance
Plus 30C ERP and pag. 34 Advance Plus
35C ERP: CO
figures) and complete the Certificate of
Exemption section of the Benchmark.
Important: after the checks all of the test
points must be sealed.
7.9
Some products incorporate an anti cycling
time delay. It is normal when first switch-
ing the boiler on for the boiler to operate on
heating for a few seconds then switch off.
After 3-4 minutes has elapsed the boiler will
(The limits for the boiler is
2
contents / other flue gas
2

Lighting the boiler

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