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9.0
Commissioning the Boiler
Screw
9.1
Commissioning the Boiler
1. Reference should be made to BS 5449 when
commissioning the boiler.
Automatic
2. Open the mains water supply to the boiler.
Air Vent
3. Open all hot water taps to purge the DHW
system.
4. Ensure that the filling loop is connected and
open, then open the heating flow and return
valves on the boiler.
5. Open the screw on the automatic air vent
(Fig. 32).
Pump
Fig. 32
6. The system must be flushed in accordance
with BS 7593 (see Section 6.2) and the flushing
agent manufacturers instructions.
2
7. Pressurise the system to approximately 0.5 bar
(Fig. 33). Close and disconnect the filling loop.
bar
8. Turn the gas supply on and purge the system
Selector Switch
according to BS 6891.
Pressure
Fig. 33
Gauge
9. Test for gas soundness.
10. If at any time during commissioning it is
30° 40° 50° 60° 70° 80°
required to terminate a particular cycle, e.g. the
2
pump overrun period, turn the selector to the OFF
bar
position and then back to either (
) or (
)
(Fig. 34).
Power On
Neon
Central Heating
Hot Water
Temperature Control
Temperature Control
Fig. 34
23
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