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7 to the position shown in Fig. 7.4.
The appliance operation light 9 will flash
every 4 seconds.
9
Fig. 7.4
If during the ignition attempt period the boiler
fails to light, the full sequence control p.c.b.
will go to lockout and the lock-out signal lamp
5 will appear.
To reset the boiler press and release the boiler
reset button 6.
7.5
Condensate pipe and traps
The full length of the condensate pipe should
be check for leaks.
The boiler has a built-in condensate trap pro-
vided with a ball valve that prevents the es-
cape of combustion products when the trap is
empty.
It is however recommended that any other
trap in the drain system is correctly filled
with water before to run the boiler.
Fill the built in condensate trap by
removing the flue elbow and pour-
ing a cupful of water into the flue
outlet (Fig. 7.5).
- 44 -
COMMISSIONING
7
Fig. 7.5
An alternative, to avoid the removal of the flue
elbow, pour the water through the flue sam-
pling point (Fig. 7.6)
Fig. 7.6
7.6
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".
• Turn on the electricity supply to the boiler,
switching on the fused spur isolation switch.
The appliance operation light 9 will flash
Sampling points
Flue exhaust
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