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contents / other flue gas figures) and com-
plete the Certificate of Exemption section
of the Benchmark.
Important: after the checks all of the test
points must be sealed.
7.9
Lighting the boiler
Some products incorporate an anti cycling
time delay. It is normal when first switching
the boiler on for the boiler to operate on heat-
ing for a few seconds then switch off. After
3-4 minutes has elapsed the boiler will then
re ignite and operate perfectly normally. The
ignition delay cycle does not prevent normal
operation of the boiler to provide d.h.w.
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
Fig. 7.7
• Press the 14 key for 2 seconds until both
and
symbols appear on the dis-
play Fig. 7.8.
COMMISSIONING
symbol (Fig. 7.7).
11
12
13
14 15
Fig. 7.8
The LCD display displays the boiler tempera-
ture (primary circuit) and the
symbols Fig. 7.9.
Fig. 7.9
• Open the gas cock
• Make sure that the ambient thermostat is in
the "heat request" position".
• Check the correct functioning of the boiler
both in domestic hot water mode and in
heating mode.
• Check the gas pressures and flow rates as
shown in section "GAS CONVERSION" to
page 77 of this booklet.
• Check that the condensate produced dur-
ing functioning fills the pipe and is regularly
drained in the draining plant pipe.
• Switch off the boiler by pressing the 14 (Fig.
7.8) key for 2 seconds until the
symbol appears on the LCD display (Fig.
7.7).
The boiler will now go through an ignition se-
quence and the burner will light.
19
18
17
16
and
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