Service And Maintenance - Ferroli DIVACONDENS F28 D Instrucciones De Uso, Instalación Y Mantenimiento

DIVACONDENS F D

4. SERVICE AND MAINTENANCE

Important
B
All adjustment, conversion, commissioning and maintenance operations
described below must only be carried out by Qualified Personnel (meet-
ing the professional technical requirements of current regulations) such
as the personnel of the Local After-Sales Technical Service.
FERROLI declines any liability for damage and/or injury caused by un-
qualified and unauthorized persons tampering with the unit.
4.1 Adjustments
Gas conversion
B
ALL COMPONENTS DAMAGED DURING CONVERSION OPERATIONS
MUST BE REPLACED.
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 data plate. 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. Disconnect the boiler power supply and close the gas cock.
2. 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
3. Switch the boiler power on and open the gas cock.
4. 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" flashing.
• press the DHW buttons (details 1 and 2 - fig. 1) to set the 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
5. 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
6. Apply the sticker contained in the conversion kit, near the data plate 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. 17) flash on the display; the heating power will be
displayed alongside.
fig. 17 - 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 boiler power is immediately adjusted to
min. (0%). Press the DHW button "+" (detail 2 - fig. 1) and boiler power is immediately
adjusted to max. (100%).
If the TEST mode is activated and enough hot water is drawn to activate the DHW mode,
the boiler remains in TEST mode but the 3-way valve goes to DHW.
To deactivate the TEST mode, press the heating buttons (details 3 and 4 - fig. 1) for 5
seconds.
The TEST mode is automatically disabled in any case after 15 minutes or on stopping of
hot water drawing (if enough hot water is drawn to activate the DHW mode).
eco
2
comfort
1 3
0 4
reset
cod. 3541N242 - Rev. 00 - 01/2018
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.
A - Upstream pressure point
B - Downstream pressure point
R
I - Gas valve electrical connection
R - Gas outlet
S - Gas inlet
B
I
A TYPE SGV100
Pi max 65 mbar
24 Vdc - class B+A
S
fig. 18 - Gas valve
Heating power adjustment
To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the
heating buttons detail 3 - fig. 1 to increase or decrease the power (min. = 00 - max. =
100). Press the reset button within 5 seconds and the max. power will remain that just
set. Exit TEST mode (see sec. 4.1).
1 2 3 4
~ 24W
fig. 19 - Gas valve connection
EN
~ 65W
57