Commissioning The Boiler - Potterton Promax 15 HE Installation And Servicing Instructions

On/Off
Switch
Fig. 35
DO NOT check gas pressure here
Inlet Gas Pressure Test Point
Supplied By www.heating spares.co Tel. 0161 620 6677
Gas Service
Fig. 34
Open
Fig. 36

10.0 Commissioning the Boiler

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 the system
according to BS 6891.
5. Turn the gas service cock anticlockwise to the
ON position and check for gas soundness up to
the gas valve (Fig. 34).
Cock
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 a minimum of 18.1 mbar.
25