30
EN
DIVACONDENS F24/F28
cod. 3541G920 - Rev. 00 - 08/2015
4. SERVICE AND MAINTENANCE
4.1 Adjustments
Gas conversion
The unit can work on natural gas or LPG and is factory-set for use with one of these two
gases, as clearly shown on the packing and data plate. Whenever a different gas to that
for which the unit is arranged has to be used, the special conversion kit will be required,
proceeding as follows:
1.
Disconnect the power supply ahead of the boiler and close the gas cock;
2.
Replace the nozzles at the main burner and pilot burner, fitting the nozzles indicated
in the technical data table in cap. 5, depending on the type of gas used
3.
Connect the power supply ahead of the boiler and open the gas cock;
4.
Modify the parameter for the type of gas:
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5.
Adjust the minimum and maximum pressures at the burner (ref. relevant para-
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6.
Apply the sticker, contained in the conversion kit, near the data plate as proof of the
conversion.
TEST mode activation
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TEST
mode
. The boiler lights at the maximum heating power set as described in the following
section.
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pear alongside.
fig. 14 - TEST mode (heating power = 100%)
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for 5 seconds.
The TEST mode is automatically deactivated in any case after 15 minutes or on stopping
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Adjustment of pressure at the burner
Since this unit has flame modulation, there are two fixed pressure values: the minimum
and maximum, which must be those given in the technical data table according to the
type of gas.
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“B”
located downstream of the
gas valve
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undoing screw
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.
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TEST mode
.
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, clockwise to increase the pressure and
anticlockwise to decrease it
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on the gas
valve.
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, clockwise to decrease the pressure and
anticlockwise to increase it.
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.
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TEST mode
repeat the activation sequence or wait 15 minutes.
A
After checking or adjusting the pressure, make sure to seal the adjust-
ment screw with paint or a specific seal.
fig. 15 - Gas valve
A
- Protection cap screw
B
- Pressure point downstream
C
- Modureg cable
D
- Protection cap
E
- Min. pressure adjustment
G
- Max. pressure adjustment
Heating power adjustment
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reset
button within 5 seconds and the max. power will remain that just
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Lighting power adjustment
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Press the
reset button
within 5 seconds and the lighting power will remain that just set.
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4.2 Startup
Before lighting the boiler
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has been vented.
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er.
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tem.
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the boiler
Checks during operation
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production stages.
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the room thermostat or remote control.
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technical data table in cap. 5.
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hot water tap. Check that in heating mode, on opening a hot water tap, the heating
circulating pump stops and there is regular production of hot water.
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