(1*/,6+
15
5$1*(5$7('
This boiler can be adapted to the heating requirements of the
system, in fact it is possible to set the maximum delivery for heating
operation of the boiler itself:
- Disconnect the power supply to the boiler
- Turn the heating water temperature selector to its maximum
- Remove the housing and turn the instrument panel (refer to
previous chapters for the detail of the figures)
- Unscrew the fixing screws of the hatch on the terminal board
cover
- Insert the jumper JP1
- Power up the boiler.
The display shows "ADJ" for about 4 sec.: it is then possible to
change the maximum heating value by means of the heating water
temperature selector and the CO button in order to set and confirm
the desired value.
The icon will appear on the display
.
Finish the procedure by removing the jumper JP1 to store the set
values.
Once the required output has been set (maximum heating), indicate
the value on the self-adhesive label supplied. For subsequent
controls and adjustments, refer to the set value.
9
The calibration does not entail the ignition of the boiler.
By rotating the heating setpoint selector knob, the value
expressed in hundreds (e.g. 25 = 2.500 rpm) is automatically
displayed.
The boiler is supplied with the adjustments shown in the table.
Depending on plant engineering requirements or regional flue
gas emission limits it is, however, possible to modify this value,
referring to the graphs below.
Fan rotations (r
.p.m.)
7+(50$/287387&859(122))$1527$7,216
071
Heat output (kW)
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
4
6
8
10
12
14
16
18
20
22
24
26
CALDAIA Heva Plus 25 BS
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The boiler is designed to operate with methane gas (G20) according
to the rating plate.
It may however be converted from one type of gas to another by
using the special kits supplied on demand.
- Methane conversion kit
- LPG conversion kit
9
The conversion must be carried out solely by the Technical
Assistance Centre or by rpersonnel authorised by even when
the boiler is already installed.
9
Refer to the instructions supplied with the kit for assembly.
9
After conversion, adjust the boiler again following the indica-
tions in the speci
¿
c section and apply the new identi
¿
cation
label contained in the kit.
Conversion from a family gas to other family gas can be performed
easily also when the boiler is installed.
This operation must be carried out by professionally qualified
personnel.
For disassembly, refer to the instructions provided below:
- Disconnect the power supply to the boiler and close the gas tap
- Remove in the following order: air distribution box cover and
casing
- Remove the gas train (
$
)
- Remove the nozzle (
%
) contained within the gas train and replace
it with the one contained in the kit
- Reassemble the gas train
- Reassemble the air distribution box cover
- Power-up the boiler and open the gas tap.
%
$
Adjust the boiler as described in chapter "Settings" referring to the
data concerning the LPG.
9
Conversion must be carried out by quali
¿
ed personnel.
9
After the transformation, apply the new rating plate included
in the kit.
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Before any cleaning operation, switch off the electrical supply by
turning the system's main switch to "Off".
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Clean the housing, the control panel, the painted parts and the
plastic parts with a cloths dipped in soap and water.
In the case of stubborn stains dampen the cloth with a mixture of
50% water and methylated spirit or with specific products.
0
Do not use fuels and/or sponges soaked in abrasive solutions
or powder detergents.
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Before starting internal cleaning operations:
- close the gas shut-off valve
- close the system taps.
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After removing the flange it will be possible to inspect and clean
inside the water tank and check the condition of the magnesium
anode.
- Turn off the hot water system stopcock and empty the water tank
through the drainage device (fig. 22)
- Loosen the nut and extract the anode (
)
- Remove the nuts (
) blocking the external flange (
) and extract it
- Clean the inside surfaces and remove all the debris through the
opening
- Check the wear conditions of the magnesium anode (
), replace
if necessary
- Check that the gasket (
) is in good condition after extracting it
from the inside flange (
), replace if necessary.
Complete the work of cleaning, re-mount the components working
the other way round to above description.
