Technical information

5
3. HOW TO USE
P1
P
2
O
FF ON
1
2
3
4 1
2
3
4
00
RR
P
r
o
g
.
h
m
Day
2
5
26
27
2
9
3
1
28
30
33
32
Switching on
1. Check that the pressure in the heating system is
adequate, i.e. the pressure gauge
33 shows 1 bar
minimum and 1.5 bar maximum.
2. Check that the gas service tap
39 (Fig. 3.3) is opened
(
Figs. 3.1 and 3.2)
a
nd that the mains power is on,
t
he green indicator
2
9
w
ill light.
T
he boiler is now ready to use.
Note : If the boiler has been turned off for some time,
the presence of air in the gas pipe may result in a
lockout.
To obtain hot water only
-
Turn the selector switch
2
5
t
o the « » position, the
g
reen LED
2
9
w
ill light; the orange LED
3
0
w
ill light to
i
ndicate that the burner is alight.
- To adjust the temperature of the domestic hot water,
it is necessary to rotate the control knob
26 «»
clockwise to increase and anti-clockwise to decrease
the temperature until the desired temperature is
achieved.
NOTE
On initial start-up, if the boiler has been switched off
for any period of time or when the storage tank is
emptied of hot water, it will be necessary for the
storage tank to be heated before hot water can be
drawn. It will also be necessary for occasional re-
heating of the storage tank to maintain the
temperature set on the hot water control knob
26 (this
will happen automaticall as long as the boiler is
powered, operating normally and the selector switch
25 is set to one of the hot water positions or
).
To obtain central heating and domestic hot water
-
Turn the selector switch
25 to the « » position, the
green LED
29 will lightt; the orange LED 30 will light to
indicate that the burner is alight.
- Upon a demand for domestic hot water the operation of
the central heating will be interrupted until the hot water
tank has been reheated to the set temperature.
- The control knob
27 « » allows you to adjust the
water temperature in the central heating circuit
according to seasonal requirements.
- Turn the control knob
27:
- Clockwise in cold weather
- Anti-clockwise in mild weather (by turning the knob
fully anti-clockwise, the Central Heating will switch
off).
- The LEDs
28 will display the temperature of the
water in the central heating circuit.
- Furthermore, your home must be fitted with a room
thermostat, ensure it is set to the desired indoor
temperature.
- The orange LED
30 will light each time the burner
operates.
34
+
+
+
+
FIG. 3.1 FIG. 3.2
GAS COCK CLOSED
GAS COCK OPEN
FIG. 3.3
39