Glow-worm Ultimate 100FF - Manual (Page 22)

22 221966B
8.4 Testing - Electrical
Turn the control thermostat knob fully clockwise to the maximum
setting, which is about 82
o C (180 o F), neon 2 will light.
The lighting sequence is automatic as follows:
The fan operates
The Spark ignition operates
The pilot solenoid opens
The pilot burner lights
The ignition spark stops
The main solenoid opens
and after a short period of time the main burner will light, look
through viewing window, see diagram 8.2.
The main burner will stay alight until switched off, either by the
control thermostat or a remote system control.
To make sure that the flame supervision device is working
correctly the following should be done:
Very cold weather may delay the operating sequence.
1. With the main burner alight, turn the gas service cock “Off”,
see diagram 8.1.
After a short period the main burner and pilot will go out.
2. The correct working of the flame supervision device is shown
by neon 4 going out within 10 seconds and the ignition starting
up.
Neons 1, 2, and 3 should stay alight.
3. If the above does not happen, refer to fault finding Section
11.1.
4. To carry on turn the gas service cock “On”, see diagram 8.1.
When the boiler switches “Off”, both the pilot and the main
burner go out. The automatic lighting sequence will work again
when heat is required.
8.5 Testing - Gas
With the boiler on proceed as follows:
The whole of the gas installation, including the meter, should be
inspected, tested for soundness and purged in accordance with
the current issue of BS6891 and in IE the current edition of I.S.
813 "Domestic Gas Installations".
Check the main burner gas pressure at least 10 minutes after
the boiler has lit, refer to Data Label.
If necessary adjust the gas pressure to obtain the required
setting turning the screw clockwise, to decrease pressure, see
diagram 8.4.
Should any doubt exist about the gas rate, check it using the gas
meter test dial and stop watch, at least 10 minutes after the
burner has lit, making sure that all other gas burning appliances
and pilot lights are off.
Turn the control thermostat knob fully anticlockwise to “O”.
Remove the pressure gauge from the test point and refit screw,
making sure a gas tight seal is made.
When the control thermostat is turned to “Off” position, by hand,
wait at least 30 seconds before turning “On” again.
There may be an initial smell given off from the boiler, this is
quite normal and will disappear after a short period of time.
Refit the electrical controls box, see diagram 7.1.
NOTE: The neon indicators on the printed circuit board are an
aid to fault finding, for details refer to Section 11. Diagram 8.3
10 to 20mm FLAME LENGTH
NOTE:
PILOT SHIELD
REMOVED FOR
CLARITY
ULTIMATE 120FF
SPARK GAP
2.5 to 4mm
NOTE:
PILOT SHIELD
REMOVED FOR
CLARITY
SPARK GAP
2.5 to 4mm
ULTIMATE 100FF
4293(2)
4139
4293(1)
10 to 20mm FLAME LENGTH
4146
Neon 4 will light
}
}
Neon 3 will light
8 Commissioning