Manual

16
221691B
PILOT FLAME DIMENSION
Diagram 7.2
PLINTH / DOOR FITTING
Diagram 7.3
7 Commissioning
FLAME
DIMENSION
SPARK GAP
DIMENSION
0937
Pilot shield
omitted
for clarity
13 (
1
/
2
in.)
APPROX.
3-4mm.
(
1
/
8
in.)
PILOT
BURNER
ASSEMBLY
VIEWING
WINDOW
0887
STUD
UPPER
HOOK
LOWER
HOOK
VIEW 1
VIEW 2
VIEW 1
VIEW 2
PLINTH
FRONT
DOOR
FASCIA
Check the operation of the flame failure device as follows: with
the main burner alight, turn gas control knob “A” fully anti-
clockwise to its stop
, the main and pilot burners will go out.
Relighting the boiler will not now be possible as a safety device
has been activated. After 60 seconds the flame failure device
should have closed, indicated by a click from the gas valve. Do
not attempt to relight until 3 minutes have elapsed.
Remove the pressure gauge and refit test nipple screw “G”.
Turn thermostat “B” to “O” then relight the pilot burner as the
relevant part of this Section.
Check that the boiler thermostat and all automatic controls are
working correctly.
Do not attempt to adjust the thermostat calibration screw.
Relight the main burner and check for gas soundness with a
suitable leak detection fluid.
7.2 Commissioning the System
Allow the system to heat up and set the pump adjuster to a
design position which gives a temperature difference of 11
o
C
(20
o
F) across the boiler.
There should be no undue noise in the system and no pumping
over of water or entry air at the open vent.
Allow the system to reach maximum temperature and examine
for water soundness. The boiler should then be turned off and
the system drained as rapidly as possible to complete the
flushing process.
The system should then be filled again, vented and examined
for water soundness.
7.3 Completion
Instruct and demonstrate the efficient and safe operation of the
boiler and system.
Hand the Instructions for Use to the user for their retention,
making sure that they are understood.
Advise the user that to ensure continued efficient and safe
operation of the boiler it is recommended that it is checked and
serviced at regular intervals. The frequency of servicing will
depend upon the particular installation and usage, but in
general once a year should be enough.
It is the law that any servicing must be carried out by a
competent person.
Draw attention, if applicable, to the current issue of the Gas
Safety (Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any property
containing a gas appliance.
Reminder - Leave these instructions and the “Benchmark”
logbook with the user.
Fit the plinth front by locating the sides over the boiler plinth then
lowering to engage the upper and lower hooks, see diagram
7.3.
Fit the door by locating the hooked runner at the bottom into the
slots in side casings and push on to the studs on the side
casings, see diagram 7.3.