- 56 -
INST
ALLA
TION
COMMISSIONING
Fig. 7.3
An alternative, to avoid the removal of the
fl ue elbow, pour the water through the fl ue
sampling point ( Fig. 7.4 )
Fig. 7.4
Sampling points
Flue exhaust
Lighting the boiler
7.7
Some products incorporate an anti cycling
time delay. It is normal when fi rst 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 fi tted (e.g. Time-
clock, room thermostat) ensure they ”call
for heat”.
Electrically power the boiler by acting on
•
the bipolar switch envisioned during instal-
lation The LCD display displays the
symbol ( Fig. 7.5 ).
Fig. 7.5
Press the
• 15
key for 2 seconds until both
and
symbols appear on the
display Fig. 7.6 .
Fig. 7.6
13
14
15
16
17
18
The LCD display displays the boiler tem-
perature (primary circuit) and the
and
; symbols; the
symbol slowly
fl ashes Fig. 7.7 .
Fig. 7.7
°C
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 fl ow rates as
•
shown in section "GAS CONVERSION" to
