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INST
ALLA
TION
COMMISSIONING
7.6 Condensate pipe and traps
The full length of the condensate pipe
should be check for leaks.
Before running the boiler, ensure that the
built in condensate trap and any other trap
in the drain system is correctly filled with
water.
Fill the built in condensate trap
by removing the flue elbow and
pouring a cupful of water into
the flue outlet (Fig. 7.4).
Fig. 7.4
An alternative, to the removal of the flue el-
bow, pour the water through the flue sam-
pling point (Fig. 7.5).
Fig. 7.5
Sampling points
Flue exhaust
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 74.
• When the boiler is switched off (out of or-
der), check the supply pressure by using
the 31 point in Fig. 7.6 and compare the
value read with that reported on the Gas
supply pressure table in the "Technical
Data" section (pag. 26 Advance Plus 25C,
pag. 29 Advance Plus 30C and pag. 32
Advance Plus 35C).
• Close well the pressure point 31 in Fig.
7.6.
