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COMMISSIONING - Page 20
Open Vented Systems
Remove the pump and flush out the system thoroughly with
cold water. Refit the pump, fill and vent the system and
examine for leaks.
Sealed Systems
The system can be filled using a sealed system filler pump
with a break tank or by any other method approved by the
local Water Authority. Refer to FIG 7 and BS6798 1987.
Remove pump and flush out the system thoroughly with
cold water. Re-fit the pump. Fill and vent the system until
the pressure gauge registers 1 .5 bar (22.Slbf/in
2
), examine
for leaks. Raise the pressure until the safety valve lifts. This
should occur within
+
0.3 bar of the pre-set lift pressure of 3
bar. Release water to attain the correct cold fill pressure.
All Systems
The whole of the gas installation including the meter should
be inspected and tested for soundness and purged in
accordance with the recommendations of BS6891.
Fit the case door into position by lifting it onto the top hinge
brackets and secure it with the lower two fixi’ng screws.
First Lighting
WARNING:
Before lighting the boiler, ensure that the
CASE DOOR HAS BEEN CORRECTLY FITTED and that
the sealing strip fitted to the case door is forming a tight
seal with the main boiler casing.
A.
Ensure that the pump and radiator isolating valves are
open.
B.
Turn the boiler thermostat to the ‘O’ position.
C. Turn on the main gas supply and the gas service cock
on boiler.
D. Ensure that the time control, if fitted is in an ‘ON’
condition, and that the room and/or cylinder
thermostats, where fitted are set to high temperatures.
E.
Switch on the external electricity supply to the boiler. In
the event of an electrical fault after installation of the
appliance, preliminary electrical system checks must
be carried out as described in the BG multimeter
instruction book. The checks to be carried out are:
A
-
Earth Continuity, B
-
Short Circuit, C
-
Polarity, D
-
Resistance to Earth.
F.
Partly depress and turn the gas control knob clockwise
ensuring the symbol
lines up with the datum mark
on the gas valve body. See Fig 25. This ensures that
the valve is in the ‘OFF’ condition.
G. Partly depress and turn the control knob anti-clockwise
until the symbol
*
lines up with the datum mark on the
gas valve body. Press and hold in the control knob and
press the spark generator button until a click is heard.
Release the spark generator button and repeat
operation until the pilot ignites. See Figs 2 & 25.
Hold in the control knob for a further 15 seconds. On
release the pilot should remain alight.
Partly depress and turn the control knob anti-clockwise
until the symbol lines up with the datum mark on the
gas valve body.
NOTE:
On first lighting, establishment of the pilot flame may be
slightly delayed due to the presence of air in the pipework.
If the pilot fails to light or goes out at any time, immediately
turn the control knob clockwise as far as possible, then
release it and wait three minutes before repeating the
lighting procedure. The control knob should not be touched
during this period.
H. Turn the boiler thermostat on and to a high setting and
the main burner will light.
I.
Set the boiler thermostat and the room and/or cylinder
thermostat(s) and time control, where fitted, to their
required operating conditions.
J.
Check soundness of all appliance gas carrying
components and joints using leak detection fluid and a
mirror where necessary.
K.
Switch off the boiler, using the thermostat knob.
FINAL ADJUSTMENT
A.
Remove the screw from the burner pressure
test nipple on the gas control valve and fit a
pressure gauge to the test nipple.
See Fig 25.
B.
Turn on the boiler thermostat, then check that the
pressure is in accordance with the values stated under
TECHNICAL DATA. The burner pressure is factory set
to the maximum stated.
C. If burner pressure adjustment is necessary, remove
the screwed cap from the gas control valve, see Fig 25
, and turn the screw beneath clockwise to increase
pressure and anti-clockwise to reduce pressure.
D. With the burner set to its correct pressure, the firing
rate given in TECHNICAL DATA should also be
obtained and this should be checked by meter reading
10 minutes after the main burner has been lit.
E.
Shut down the boiler, remove the pressure
