23
mA for G20 and 165 mA for LPG).
- carefully prise out the protection cap of the adjustment
screws, using a screwdriver
- with a 10mm spanner, use the adjustment nut of the maximum
output in order to obtain the value indicated in table
- disconnect the modulator electrical connection.
- wait until the pressure on the pressure gauge is stable at
minimum value
- paying attention not to press the internal shaft, with a Phillips
screwdriver turn the red adjustment screw to regulate the
domestic hot water minimum temperature and calibrate until
the pressure gauge reads the value indicated in table
- reconnect the modulator electrical connection.
- close the domestic hot water tap
- carefully refit the protection cap of the adjustment screws.
7.3.2 Minimum and maximum heating electric adjustment
The “electric adjustment” function is activated and deactivated
exclusively by the jumper (JP1).
The function can be enabled in the following way:
- by powering the card with the jumper JP1 inserted and the
mode selector in winter position, independently from the
possible presence of other operation request.
- by inserting the jumper JP1, with the mode selector in winter
position, without heat request in progress.
By activating the function the burner is ignited through
simulation of heat request in heating.
To perform calibration operations, proceed as follow:
- switch off the boiler
- remove the shell and access the card
- insert the jumper JP1 to enable the knobs placed on the
control panel to the minimum and maximum heating
adjustment functions.
- make sure that the mode selector is in winter position
- power the boiler
Electric card in voltage (230 Volt)
- turn the heating water temperature adjustment knob B until
it reaches the heating minimum value as indicated in the
multigas table
- insert the jumper JP2
- turn the domestic hot water temperature adjustment knob C
until it reaches the heating maximum value as indicated in
the multigas table
- remove the jumper JP2 to store the heating maximum value
-
remove the jumper JP1 to store the heating minimum
value and to get out the calibration procedure
- reconnect the compensation inlet to the air distribution box
Disconnect the pressure gauge and retighten the pressure
test point screw.
To finish the calibration function without storing the set values,
proceed as follows:
a) set the mode selector to position (OFF)
b) remove power supply voltage
The calibration function is automatically finished, without
storing minimum and maximum values, after 15 minutes of its
activation.
The function is automatically finished also in case of definitive
stop or lockout.
Also in this case, function conclusion DOES NOT provide
values storing.
Note
To calibrate only maximum heating, it is possible to remove
the jumper JP2 (to store the maximum) and then get out from
the function, without storing the minimum, setting the mode
selector to (OFF) or removing the voltage from the boiler.
After each intervention on the adjustment element of the gas
valve, seal it with sealing varnish.
When adjustment is complete:
- restore set temperature with the ambient thermostat to the
desired temperature
- set the heating water temperature selector to the desired
position
- close the instrument panel
- pull the shell back in place.
MULTIGAS TABLE
Methane gas
(G20)
Maximum pressure downstream CH valve
mbar
11.80
Maximum pressure downstream DHW valve
mbar
11.80
Minimum pressure downstream CH valve
mbar
1.50
Minimum pressure downstream DHW valve
mbar
1.50
DHW MINIMUM ADJUSTMENT
RED SCREW
GAS PRESSURE
CHECK
DOWNSTREAM
FROM THE GAS
VALVE
FASTON
CONNECTIONS
MAXIMUM POWER
ADJUSTMENT NUT
PROTECTION
COVER
COMPENSATION
PIPE
CONNECTION
JP1
Bridge to enable function calibration
JP2
Bridge to adjust maximum heating
JP3
Bridge to select MTN-LPG
Fig. 33
Fig. 34