SECTION 6 - COMMISSIONING INSTRUCTIONS
Before commissioning the boiler, the whole gas installation including
Purge air from the gas installation by the approved methods only.
WARNING. Whilst effecting the required gas soundness test
and purging air from the gas installation, open all windows
and doors, extinguish naked lights and DO NOT smoke.
blocked. Before commencing commissioning, ensure that the CH
CH system needs to be treated with water treatments that are
approved for use with aluminium alloy heat exchangers.
Please Note: The combustion for this appliance has been
checked, adjusted and preset at the factory for operation on
commissioning process, the combustion of this appliance must be
DO NOT adjust the air/gas ratio valve.
- That the boiler has been installed in accordance with these
described in the Flue Installation section.
Proceed to put the boiler into operation as follows:
CHECK THE OPERATIONAL (WORKING) GAS INLET
Set up the boiler to operate at maximum
rate by opening hot tap to maximum
With the boiler operating in the
maximum rate condition check that
the operational (working) gas pressure
at the inlet gas pressure test point
complies with the requirements - refer to
“Gas Supply” on page 13.
Ensure that this inlet pressure can be
obtained with all other gas appliances in
the property working at maximum.
6.1 DOMESTIC HOT WATER
Turn on the main cold water supply.
Fill and vent the installation by turning on and off the various hot
water taps in the installation.
Check hot water taps in the installation.
Check for and repair leaks as necessary.
A. Mode Control Knob
B. DHW/Preheat Control
C. CH Control
D. Boiler Status
E. Burner ‘on’ Indication
F. Pre Heat on/off Indication
B C D
6.2 CENTRAL HEATING CIRCUIT
Fill the siphon in the condense pipework prior to operating.
In order for the boiler to function correctly, the pressure in the
central heating circuit must be between 1 and 1.5 bar on the
Both the boiler and central heating installation must be purged of
any air. The boiler has an auto air vent integral to the pump which
must be loose prior to commissioning.
Fill the central heating circuit using one of the approved methods
to 1 bar.
Open radiator vent screws and turn off when water appears.
With the system hot, examine all water connections. The system
pressure should not exceed 2.5 bar.
Turn off gas, water and electricity when draining down.
required concentration and check for water leaks.
Check that the condensate operates and the pipework for any
6.3 INITIAL OPERATION
Ensure central heating circuit is full and vented, and pressure
gauge is reading 1.0 bar.
6.4 DOMESTIC HOT WATER MODE
Turn the “mode” control knob to tap/radiator icon . Ensure all
external controls are calling for heat. Set the integral timer to ON.
Display reads “C” then “C”
when burner is lit.
Ensure all radiators warm up evenly. The CH temperature can be
Check the DHW functions by turning on a hot water tap.
Close the DHW tap and set the integral timer and external
controls to off.
Display will read “0”.