C
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MMI
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NIN
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INSTALLATION & SERVICING INSTRUCTIONS
29
STARTING THE APPLIANCE
6-720-611-730b (12.05)
STARTING THE APPLIANCE
IMPORTANT: Never run the appliance when
the appliance/system is unpressurised or
empty.
Switching the appliance on/off:
1 Check that switch (A) is in the '
0
' off position.
Turn on mains power supply.
Turn switch (A) from
0
(off ) to
I
(on position).
The power on indicator (B) illuminates green
and the burner on indicator (D) illuminates red.
Note: the boiler runs for 15 minutes at minimum
heating output to fill the condensate trap, the
display (C) alternates between '
-ll-
' and the
central heating flow temperature or '
t'
& '
-ll-
' if
heating the internal DHW tank. This occurs if
the mains supply has been interrupted.
To switch off the appliance, turn switch (A) anti-
clockwise to the
0
position.
The power on indicator (B) extinguishes.
Checking gas inlet pressure:
2 Connect a pressure gauge to the gas valve
inlet test point (F).
Press button (E) until illuminated.
The gas inlet pressure (with all gas appliances
working) must not be less than:
N.G. 18.5 mbar.
L.P.G. 37 mbar.
IMPORTANT: Do not continue
commissioning until the correct gas pressure
is achieved.
Measure the gas rate at the gas meter after
10 minutes operation at maximum;
see 'Technical
Data' in the Appliance Information section.
Switching on the central heating:
3 Turn the CH flow temperature control (G)
clockwise.
Display (C) shows the CH flow temperature:
Control No.
CH flow temperature
1
approx. 35°C
2
approx. 43°C
3
approx. 51°C
4
approx. 59°C
5
approx. 67°C
E
approx. 75°C
max
approx. 88°C
NOTE: the boiler is designed with a differential
of 20°C across the heating system.
To obtain the 'max' setting, the limit stop at the
E
setting has to be repositioned as follows:
Remove cap (H) using a flat bladed screwdriver
and refit with the raised point facing the centre
of the switch, as shown.
Turn control to max.
System controls:
4 Set the thermostatic radiator controls to
required temperature.
Set the clock/programmer to continuously ON
and room thermostat to maximum temperature.
Setting DHW & Tank water temperature:
5 Turn the DHW control (J) to select a hot water
temperature between 45° and 65°C.
( '
t
' displays when heating the internal DHW
tank).
'ECO' :
The ECO indicator (K) illuminates when
there is no DHW demand from the programmer.
12
6
3
9
E
A
B
C
D
C
G
J
K
C
F
1
3
4
5
2
H
H