Glow-worm Swift flow 80 Instructions For Use Installation And Servicing page 26

11.4 Initial Lighting of Pilot - SIT
Identify the boiler controls, see diagram 11.1.
Check that the boiler is isolated from the electrical supply at the
external isolator.
Turn gas control knob "D" to
depress. Press and release piezo button "E" until the pilot
burner lights, at this stage air may be present in the gas
components, so the operation may need repeating. When the
pilot flame has lit and is stable, keep knob "D" fully depressed
for about 15 seconds and then release. The pilot burner should
stay alight.
If the pilot flame goes out now or at any time, a safety device
prevents immediate relighting.
attempting to relight.
If the pilot goes out on releasing knob "D" repeat the lighting
instructions but now keep knob "D" depressed for a little longer
after the pilot has lit.
If the pilot burner will not stay alight, refer to "Thermocouple and
Overheat Cutoff" in Fault Finding section of the Servicing
Instructions.
The pilot flame size is factory preset and should envelop the
thermocouple to about the size given in diagram 11.4. If the
flame size is incorrect, refer to "Pilot Burner" in Servicing
Instructions.
Check for soundness of the pilot supply using a suitable leak
detection fluid.
Test the operation of the flame supervision system by turning
knob "D" clockwise to "O" position to make sure that it shuts
down within 60 seconds, indicated by a click from the valve.
Fit the cover of the inner case, making sure that it is fitted and
seals correctly, using the four screws previously removed, see
diagram 6.2.
Make sure that all hot water draw off taps are closed then set
switch "C" to "Off" as shown in diagram 11.1.
With the boiler isolated from the electrical supply the pilot flame
may go out. If this should happen, wait 4 minutes then relight
the pilot burner following the above lighting instructions but with
the electrical supply connected.
12 to 14mm
SPARK GAP 3 TO 4 mm
11.5 Burner Pressure - Hot Water - Honeywell
The burner pressure is factory preset and no adjustment should
be required.
Connect the electrical supply; the pump and fan will operate for
about 30 seconds, then the fan will reduce speed and the pump
stop.
Relight the pilot burner.
Fully open the largest hot water draw off tap whereby the main
burner will light, the flames gradually increasing to the maximum.
221469B
11 Commissioning
pilot/ignition position and
Wait four minutes be fore
12 to 14mm
Diagram 11.4
Check the soundness of the boiler gas joints, with the main
burner on, using a leak detection fluid. Take care not to splash
any of the electrical components.
Fully open the hot water throttle, (clockwise), see diagram 11.5.
Check that the water flow rate is not less than 11Litre/min.
(2.4gall/min) to prevent any modulation of the gas pressure.
This is equivalent to 5.5 seconds to fill a 1Litre container (3.1
seconds for 1pint).
To achieve this flow rate a water pressure of at least 0.8bar is
required during commissioning, although subsequently the
appliance will work at a minimum pressure of 0.5bar.
This flow rate should prevent any modulation of the gas pressure.
Check the burner pressure is within +/-0.35mbar (+/-0.14in wg).
of 15.8mbar (6.3in wg), the hot water burner pressure. If this is
incorrect, the burner pressure may be adjusted to the correct
setting by turning the hot water gas pressure adjuster
(potentiometer), using an insulated screwdriver, see diagram
11.6. Gain access to the adjusters on the control board by
removing the control housing cover, see diagram 10.1. Turn the
adjuster slowly, always making adjustment by reducing below
the required pressure then increasing up to the required setting,
(turn clockwise to increase).
Close the hot water draw off.
If the maximum pressure cannot be obtained, check that the gas
supply of adequate size, refer to Section 1.7.
11.5 Burner Pressure - Hot Water - SIT
The burner pressure is factory preset and no adjustment should
be required.
Connect the electrical supply.
Relight the pilot.
Turn gas control knob "D" to '
Fully open the largest hot water draw off tap whereby the main
burner will light, the flames gradually increasing to the maximum.
Check the soundness of the boiler gas joints, with the burner lit,
using a suitable leak detection fluid. Take care not to splash any
of the electrical components.
Fully open the hot water throttle, (clockwise), see diagram 11.5.
Check that the water flow rate is not less than 11Litre/min
(2.4gall/min) to prevent any modulation of the gas pressure.
This is equivalent to 5.5 seconds to fill a 1Litre container (3.1
seconds for 1pint).
To achieve this flow rate a water pressure of at least 0.8bar is
required during commissioning, although subsequently the
appliance will work at a minimum pressure of 0.5bar.
This flow rate should prevent any modulation of the gas pressure.
Check that the burner pressure is 16.3mbar +/- 0.35mbar (6.5in
wg +/- 0.14wg) If this is incorrect, the burner pressure may be
adjusted by turning the larger brass adjusting nut of the modulator,
anti-clockwise to decrease, after removing the cap, see diagram
11.2.
Fine adjustment may be achieved by turning the hot water gas
pressure adjuster (potentiometer), using an insulated
screwdriver, see diagram 11.5. Gain access to the adjusters on
the control board by removing the control housing, see diagram
10.1.
Turn the adjuster slowly, always making adjustments by reducing
below the required pressure then increasing up to the required
setting, turn clockwise to increase.
Close the hot water draw off.
If the maximum pressure cannot be obtained, check that the gas
supply is of adequate size, refer to Section 1.8.
26
', main burner position.