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7.7
Checking the inlet pressure
• Remove the boiler front panel, see sec-
tion "Dismantling the external panels" on
page 68.
• With the boiler switched on at full rate
(maximum output power), check the sup-
ply pressure by using the 25 point in Fig.
7.8 and compare the value with that re-
ported on the Gas supply pressure table
(minimum inlet pressure) in the "Technical
Data" section (page 24 ADVANCE 25S
and page 27 ADVANCE 30S).
• Ensure the test nipple 25 in Fig. 7.8 is
firmly closed.
A
B
25
Fig. 7.8
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
(The limits for the boiler is
2
given in "Technical Data" section (page
24 ADVANCE 25S and page 27 AD-
- 54 -
COMMISSIONING
VANCE 30S: CO
gas figures) and complete the Certificate
of Exemption section of the Benchmark.
Important: after the checks all of the test
points must be sealed and tested for
tightness.
7.8
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 then re ignite and operate perfectly nor-
mally.
If external controls are fitted (e.g. Timeclock,
room thermostat) ensure they "call for heat".
• Electrically power the boiler by switching
on the double pole isolation switch. The
LCD will display, the
7.9).
Fig. 7.9
• Press the 12 key for 2 seconds until
symbol appear on the display Fig. 7.10.
Fig. 7.10
contents / other flue
2
Lighting the boiler
15
12
symbol (Fig.
14
13
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