TAURA D MCA
22
EN
cod. 3541A212 - 04/2012 (Rev. 00)
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for
these devices from their breaking contacts Their power supply must be by
means of direct connection from the mains or with batteries, depending on the
kind of device.
Accessing the electrical terminal block
Follow the instructions given in fig. 8 to access the electrical connections terminal block.
The layout of the terminals for the various connections is given in the wiring diagram in
fig. 21.
fig. 8 - Accessing the terminal block
3.6 Air/fume ducts
The diameter of the flue connection pipe must not be less than that of the connection on
the anti-backflow device. Starting from the anti-backflow device it must have a vertical
section at least 50 cm long. Current standards must be complied with regarding sizing
and installation of the flues and connection pipe.
B
The boiler is also equipped with a safety device (fume thermostat) that stops
operation of unit in case of inadequate draught of obstruction of the flue. This
device must never be tampered with or deactivated.
4. SERVICE AND MAINTENANCE
4.1 Adjustments
Gas conversion
The unit can operate on natural gas or LPG and is factory-set for use with one of these
two gases, as clearly shown on the packing and on the dataplate. Whenever a gas dif-
ferent from that for which the unit is arranged has to be used, the special conversion kit
will be required, proceeding as follows:
1.
Replace the nozzles at the main burner, fitting the nozzles specified in the technical
data table in cap. 5, according to the type of gas used
2.
Modify the parameter for the type of gas:
•
put the boiler in standby mode
•
press the DHW buttons details (1 and 2 - fig. 1) for 10 seconds: the display
shows “
b01
“ blinking.
•
Press the DHW buttons (details 1 and 2 - fig. 1
) to set parameter 00
(for nat-
ural gas operation) or
01
(for LPG operation).
•
press the DHW buttons details (1 and 2 - fig. 1) for 10 seconds.
•
the boiler will return to standby mode
3.
Adjust the minimum and maximum pressures at the burner (ref. relevant para-
graph), setting the values given in the technical data table for the type of gas used
4.
Apply the sticker contained in the conversion kit, near the dataplate as proof of the
conversion.
TEST mode activation
Press the heating buttons (details 3 and 4 - fig. 1) together for 5 seconds to activate the
TEST
mode. The boiler lights at the maximum heating power set as described in the fol-
lowing section.
The heating and DHW symbols (fig. 9) flash on the display; the heating power will be dis-
played alongside.
fig. 9 - TEST mode (heating power = 100%)
Press the heating buttons (details 3 and 4 - fig. 1) to increase or decrease the power
(min.=0%, max.=100%).
Press the DHW button
"-"
(detail 1 - fig. 1) and the boiler power is immediately adjusted
to min. (0%). Press the DHW button
"+"
(detail 2 - fig. 1) and the boiler power is imme-
diately adjusted to max. (100%).
To deactivate the TEST mode, press the heating buttons (details 3 and 4 - fig. 1) together
for 5 seconds.
The TEST mode is automatically disabled in any case after 15 minutes.
Pressure adjustment at the burner
Since this unit has flame modulation, there are two fixed pressure settings: minimum and
maximum, which must be those given in the technical data table according to the type of
gas.
•
Connect a suitable pressure gauge to the pressure point
"B"
downstream of the
gas valve.
•
Activate the TEST mode (see cap. 4.1).
•
Press the Eco/Comfort button for 2 seconds to access the gas valve Calibration
mode.
•
The card goes to the setting “q02”; displaying the actually saved value, by pressing
the DHW buttons .
•
If the pressure gauge reading is different from the nominal maximum pressure, pro-
ceed by increases/decreases of 1 or 2 units of parameter “q02” by pressing the
DHW buttons : the value is stored after each modification; wait 10 seconds for the
pressure to stabilise.
•
Press the heating button “-” (ref. 3 - fig. 1).
•
The card goes to the setting “q01”; displaying the actually saved value, by pressing
the DHW buttons .
•
If the pressure gauge reading is different from the nominal minimum pressure, pro-
ceed by increases/decreases of 1 or 2 units of parameter “q01” by pressing the
DHW buttons : the value is stored after each modification; wait 10 seconds for the
pressure to stabilise.
•
Recheck both adjustments by pressing the heating buttons and adjust them if nec-
essary by repeating the above procedure.
•
Press the Eco/Comfort button for 2 seconds to return to the TEST mode.
•
Deactivate the TEST mode (see cap. 4.1).
•
Disconnect the pressure gauge.
72
139
138
bar
Содержание TAURA D 24 MCA
Страница 67: ......
