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10.0 COMMISSIONING
Publication No. 5106451
10.1
Commissioning the Boiler
1. Reference should be made to BS 5449 Section 5
when commissioning the boiler.
2. Flush the whole system using a suitable flushing
agent (see Section 6.2) and vent the radiators.
Check for water leaks.
3. Refill the system with inhibitor following the
inhibitor manufacturer’s instructions and BS 7593
Code of Practice for Treatment of Water in Domestic
Hot Water Central Heating Systems (see Section
6.2).
4. Turn the gas supply on and purge according to in
GB BS 6891 and in IE I.S. 813 “Domestic Gas
Installations”.
5. Turn the gas service cock anticlockwise to the ON
position and check for gas soundness up to the gas
valve (Fig. 34).
6. Switch on the on/off switch (Fig. 35) and run the
system and check the boiler for correct operation.
NOTE:
The boiler is self-regulating dependent
upon the system load. The 15 HE will modulate
between inputs of 16.88kW and 10.2kW. The 24
HE will modulate between inputs of 24.5kW and
10.2kW.
No adjustment of the gas valve is
permissible.
7. With the system cold and all controls calling for
heat check the gas pressure at the inlet tapping of
the gas valve (Fig. 36). The pressure must be greater
than 14 mbar.
IN
OUT
Gas Service
Cock
Fig. 34
Fig. 36
Open
Inlet Gas Pressure Test Point
DO NOT
check gas pressure here
Fig. 35
On/Off
Switch
