Glow-worm Swift flow 100 Installation Instructions Manual page 23

11.5 Burner Pressure - Hot Water - SIT
The burner pressure is factory preset and no adjustment
should be required.
Switch on 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.
Turn gas control knob "D" to
Fully open the largest hot water draw off tap and the
main burner will light, the flames gradually increasing to
maximum.
Check the soundness of the gas joints, with the main
burner on, using a suitable leak detection fluid.
Adjust the water throttle to obtain a flow rate of 12Litre/
min, clockwise to increase, see diagram 11.4.
This is equal to 5.0 seconds to fill a 1Litre container.
To achieve this flow rate a water pressure of at least
0.08MPa is required during commissioning, although
subsequently the appliance will work at a minimum
pressure of 0.05MPa.
This flow rate should prevent any modulation of the gas
pressure.
Check that the burner pressure is 0.82kPa +/- 0.02kPa.
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 cover, 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.
DOMESTIC
HOT WATER
THROTTLE
1 1 C o m m i s s i o n i n g
, main burner position.
Diagram 11.4
23
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 maximum.
Check the soundness of the boiler gas joints, with the
main burner on, using 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 to prevent any modulation of the gas
pressure. This is equivalent to 5.5 seconds to fill a
1Litre container.
To achieve this flow rate a water pressure of at least
0.08MPa is required during commissioning, although
subsequently the appliance will work at a minimum
pressure of 0.05MPa.
This flow rate should prevent any modulation of the gas
pressure.
Check the burner pressure is within +/-0.02kPa of
0.82kPa, 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 is of adequate size, refer to Section 1.8.
221017B