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COMMISSIONING
5.3
Starting the appliance
NOTICE: Never run the appliance when the appliance/
system is empty or partially filled.
SWITCHING THE APPLIANCE ON/OFF:
1. Turn on mains power supply.
▶ Turn on any external controls.
▶ Set the thermostatic radiator controls to maximum temperature.
▶ Set the clock/programmer to continuously ON and the room
thermostat to maximum temperature.
A
On/off button
B
Cover or position for optional plug-in control
C
Display
D
System pressure gauge
E
Reset button
F
ECO button (only with optional diverter valve)
G
Holiday button (only in conjunction with optional diverter valve)
H
DHW temperature control (only with optional diverter valve)
I
Central heating temperature control
J
Performance test button
K
Service button
L
Burner indicator (GREEN)
M
On/off and fault indicator (BLUE)
N
Auto Air Vent
Table 28
B
A
L
K
3
4
2
5
J
1
6
max
I
Fig. 48 Control panel
▶ Press button (A) and the power on indicator (M) illuminates BLUE.
After a few seconds the display will show the flow temperature.
2. Turn the CH temperature control (I) to maximum. The burner on
indicator (L) illuminates GREEN when the burner has lit.
▶ The first time the appliance is switched on, a once-
only venting function is activated. The heating pump
then switches on and off at intervals. This sequence
lasts about 8 minutes. The display shows
alternation with the CH flow temperature. The
automatic air vent (N) must be open, please verify.
▶ The boiler runs for 15 minutes at minimum heating
output to fill the condensate trap, the display (C)
alternates between "-II-" and the central heating flow
temperature. This occurs every time the mains
supply has been interrupted.
32
C
2
1
1
3
0
4
bar
D
reset
eco
E
F
3
4
2
e
G
1
6
min
max
H
M
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3. If the boiler fails to light the BLUE power indicator (M) and reset
button (E) will flash alternately.
To reset press and hold the reset button (E) for 2 seconds. The boiler
will be reset.
CAUTION: DO NOT PRESS POWER INDICATOR (B) TO
RESET BOILER.
N
Fig. 49 Auto Air Vent
5.4
Water treatment
NOTICE: Debris from the system can damage the boiler
and reduce efficiency. Failure to comply with the
guidelines for the use of water treatment with the
appliance will invalidate the appliance warranty.
Ensure that the system has been cleaned as on page 10.
FLUSHING (Central Heating):
1. Switch off the boiler.
▶ Open all drain cocks and drain the system while the appliance is hot.
2. Close drain cocks and add a suitable flushing agent at the correct
strength for the system condition in accordance with the
manufacturer's instructions.
3. Run the boiler/system at normal operating temperature for the time
stated by the manufacturer of the flushing agent.
4. Drain and thoroughly flush the system to remove the flushing agent
and debris.
INHIBITOR (Central Heating):
5. Check drain cocks are closed and all radiator valves are open before
1)
adding a suitable
inhibitor (or combined inhibitor/anti-freeze if the
system is exposed to freezing conditions) to the heating system
water in accordance with the manufacturers instructions.
6. Fill via a WRAS approved filling loop to between 1 and 2 bar.
7. Vent all radiators; retighten vents when complete.
8. Re-pressurise if necessary to 1bar.
▶ Set all controls to maximum.
▶ Record the date when the inhibitor was added to the system on the
guarantee card.
1) Compatible with aluminium. The pH value of the system water must be less
than 8 or the appliance guarantee will be invalidated.
6 720 812 175-13.1O
6 720 815 724 (2015/11)
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