26
2000225065A
Diagram 11.3
9531
BYPASS VALVE
ADJUSTMENT
SCREW
11 Commissioning
11.1 Filling Domestic Water Circuit
Fully open any valves in the domestic water supply to the boiler.
Open the domestic water isolation valve, slot in line with the
length of the valve, see diagram 8.1.
Open all hot water taps in turn and close them when water flows.
Check for water soundness of the complete domestic water
system.
The water flow rate is restricted to a maximum 10 l/min (24cxi)
12 l/min (30cxi) and15.5 l/min (38cxi) by a restrictor fitted during
boiler installation, see diagram 8.2.
11.2 Filling the Heating Circuit
Open the two central heating isolating valves and domestic cold
water inlet valve, slots in line with the length of the valve, see
diagram 8.1
To enable the system pressure to be viewed, turn the Central
heating temperature knob and hot water temperature knob to
the off position.
Turn the mains electricity supply on to the appliance and ensure
that the mains switch on the appliance fascia is set to the on
position.
The system pressure should be viewed on the digital display on
the front of the appliance, see diagram 1.
Pressurise the system by opening the tap of the inbuilt filling
loop, see diagram 4.2. Fill the system until the pressure on the
display reads at least 1.0bar. Note that on filling the system a
small amount of water may be discharged from the reduced
pressure zone valve, see diagram 4.2.
Make sure that the automatic air vent works correctly and that
the black cap is loosely fitted to allow air to escape, see diagram
11.1.
Check the heating system and boiler connections for water
soundness.
11.3 Preparation for Lighting
Isolate the boiler from the mains electrical supply.
Test for gas soundness and purge air from the gas supply. Turn
on the gas service cock, see diagram 8.1.
11.4 Initial Lighting
The lighting procedure of the boiler is fully automated.
Check that all external controls are calling for heat. If an integral
clock/timer is fitted check that it is correctly programmed and if
necessary overridden to provide heat.
Ensure that both the central heating and the domestic hot water
control knobs are turned OFF.
Turn on the mains electrical supply and the mains reset knob to
(I) on the controls fascia.
Turn the central heating hot water knob to (I) MINIMUM.
The digital display will show water temperature in central
heating demand.
The fan should start and after a few seconds the ignition will
commence
If the burner fails to light the fan will stop. Initially this may be due
to air in the gas supply line. The boiler will automatically have
three attempts at ignition.
If necessary turn the reset switch to the off position (O), then
back to the on position (I) and the boiler will restart.
After the boiler has lit, allow to warm at minimum temperature
setting to purge any air from the system.
Once the system has been purged of air turn the Domestic hot
water control knob to the desired position and open a hot water
tap. The three way valve will move to hot water supply and the
display will read system pressure. Check that hot water is
available and then close the hot water tap.
Turn the central heating knob to the desired temperature.
The appliance will then continue to fire in central heating until
the user controls are satisfied or there is another demand made
for hot water.
Diagram 11.2
Diagram 11.1
CAP
AUTOMATIC
AIR VENT
PUMP
ELECTRICAL
PLUG
GAS CONTROL
VALVE
PRESSURE TEST
POINT
11481
11483
