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9.0 Commissioning the Boiler
26
9.1 Commissioning the Boiler
1. Reference should be made to BS 5449 Section 5
when commissioning the boiler.
2. Open the mains water supply to the boiler.
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. 31).
6. The system must be flushed in accordance with BS
7593 (see Section 6.2) and the flushing agent
manufacturers instructions.
7. Pressurise the system to 1.0 bar then close and
disconnect the filling loop.
8. Turn the gas supply on and purge according to in GB
BS 6891 and in IE I.S. 813 “Domestic Gas Installations”.
9. Test for gas soundness.
10. If at any time during commissioning it is required to
terminate a particular cycle, e.g. the pump overrun
period, turn the selector to the OFF position and then
back to either ( ) or ( ) (Fig. 33).
Automatic Air
Vent
Pressure Gauge
Screw
2
1
0
4
3
bar
Fig. 31
Selector Switch
Central Heating
Temperature Control
Hot Water
Temperature Control
Fig. 32
30
o
40
o
50
o
60
o
70
o
80
o
2
1
0
4
3
bar
Reset
OFF
ON
PREHEAT
Pump
Fig. 33
Power On
Neon