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221138C
1 1 C o m m i s s i o n i n g
11.6 Domestic Water Flow Rate
Adjust the water throttle to obtain a flow rate of:
75e: 9.0 L/min (2.0 gall/min), equivalent to
6.7 seconds to fill a 1 litre container, or
3.8 seconds to fill a 1 pint container.
80e:9.6 L/min (2.1 gall/min),equivalent to
6.3 seconds to fill a 1 litre container, or
3.6 seconds to fill a 1 pint container.
Close the tap when adjustment is satisfactory.
The minimum water flow rate is 3.6Litre/min
(0.8gall/min) equivalent to 16.5 seconds to fill a 1Litre
container (9.5 seconds to fill a 1pint container). If this
flow rate cannot be achieved, check that there is no
partial blockage and that the supply is of adequate size.
Put right as necessary.
Close the hot water draw off tap.
11.7 Burner Pressure - Heating
The burner pressure is factory preset and no adjustment
should be required.
Check that all remote heating system controls, room
thermostats, integral clock and the like are switched on/
programmed and calling for heat.
Set switch “C” to “On” as shown in diagram 11.1.
The pump will circulate water through the boiler and the
main burner will light.
Check that the burner pressure, with the heating system
cold to prevent any modulation of the gas pressure, is
/-0.2mbar (+/-0.08in wg) of
75e: 8.0mbar (3.4in wg), the central heating
pressure.
80e:
8.5mbar (3.6in wg), the central heating
pressure.
If the burner pressure is incorrect, it may be adjusted to
the correct setting by turning the central heating gas
pressure adjuster (potentiometer), using an insulated
screwdriver, see diagram 11.4. Turn the adjuster slowly,
always making adjustment by reducing below the
required pressure then increasing up to the required
setting, (turn clockwise to increase).
Isolate the boiler from the electrical supply.
Remove the pressure gauge and tighten the test
point screw.
Fit the cover and secure the control housing with the
screws previously removed.
Test for gas soundness around the burner pressure test
point with the main burner alight, using leak detection
fluid. Take care not to splash any of
electrical components.