Installation Manual
Wall Hung Boiler – Cod. 99817NA – July 2001
17
TECHNICAL DATA
DIFFERENTIAL AIR PRESSURE SWITCH FOR FAN CONTROL
To guarantee maximum safety in flue exhaust, a differential pressure
switch is installed on the Room Sealed Combustion Chamber Model (wall-
mounted, room-sealed boilers) and on forced draught boilers. This
pressure switch automatically controls perfect functioning of the fan and
the passage of both external air and exhaust flue pipes.
FLUE SAFETY THERMOSTAT
Natural draught boilers model Open Combusion hamber Model are
equipped with a device (see fig. 1) to control correct exhaust of
combustion gases. This device guarantees maximum safety of operation if
the flue should become partially or totally blocked, or if its section is not
suitable for exhaust of combustion gases.
N.B.
It is strictly forbidden to tamper with the device.
Before resetting the device, check the exhaust flue section and make sure
there are no blockages obstructing the correct escape of fumes.
RESETTING:
before resetting the thermostat, carry out the following operations:
#
turn off the main power supply switch;
#
turn the summer-winter selector switch to the
OFF
position, detach the
electrical connection (
1
) on the flue safety thermostat (see fig.1), press
the button (
2
) between the two electrical contacts and then attach the
electrical connection
1
again.;
#
turn the main power supply switch on again and set the summer/winter
selector switch to the position required.
DIVERTER VALVE VC 6012MG6000
The diverter valve is the device which controls the boiler switching from
central heating to d.h. water circuit and vice versa. The diverter valve is
fitted with a manual command lever
C
(see fig. 3) which, when set on the
top position, towards the valve head, allows the boiler operating on the
domestic hot water circuit while, when set on the low position, the boiler
operates on the central heating circuit.
When the
C
lever is set on the central position, it allows the actuator on
midway.
In this position,
to be used only in case of motor failure or damage
, both
central heating and domestic hot water ports are open and both domestic
hot water and central heating circuits are operating.
To restore the initial position, separate the actuator and the valve body
following instructions from no.1 to no.4 (see fig.2).
To separate the motor from the valve body proceed as follows (see fig.2):
1.
Press button
A
under the motor.
2.
Simultaneously keep the
A
button pressed and turn the actuator
counter-clockwise;
3.
Lift off the motor
4.
To disconnect the power supply cable press the
B
tap located on the pin
C
.
See fig.4 to perform the electrical wiring of the diverter valve to the main
printed circuit board.
Fig. 4
)
A
1
C
2
4
B
3
AB
A
B
D.H. WATER SETTING
CENTRAL HEATING SETTING
MANUAL SETTING
AB
A
B
C
CENTRAL HEATING SETTING
D.H. WATER SETTING
LIGHT-BLUE
3 6
5
2
1 4
Light-blue -
Common
Brown
- D.H. Water
Black
- Central Heating
M5 TERMINAL
BROWN
BLACK
RAMIRE P.C. BOARD
22
23
24
ELECTRICAL CONNECTION
2
1
Fig. 3
Fig. 2
Fig. 4
Fig. 1
FUMES SAFETY
THERMOSTAT 75°
WITH MANUAL RESET
