83
IT
ES
PT
GB
RUS
4.1 ADJUSTMENT OF
D.H.W. FLOW RATE
To adjust the hot water flow rate, use the
flow-rate regulator on the pressure switch
valve (5 fig. 5).
Remember that the flow rates and corre-
sponding temperatures of use of hot water,
given in section 1.3, have been obtained by
positioning the selector of the circulation
pump on the maximum value.
Should there be any reduction in the D.H.W.
flow rate, the filter installed on the inlet to
the pressure switch valve (3 fig. 5) will need
cleaning.
To access the filter, you must first
turn off the cold domestic water tap assem-
bled on the template.
4.3 GAS VALVE
The boiler, is equipped standard with the
HONEYWELL VK 4115V gas valve (fig. 20).
4.4 ADJUSTMENT OF HEAT
OUTPUT FOR HEATING
To adjust boiler heat output for heating pur-
poses, i.e., modifying the setting made at the
factory which is approximately 17 kW, use a
screwdriver to adjust the heating heat out-
put trimmer (6 fig. 17). To increase working
pressure, turn the trimmer clockwise; to
reduce pressure, turn the trimmer coun-
terclockwise. Output can be verified for both
methane and propane gas boilers by
checking the Hertz or air pressure mbar
value in Table 5 (fig. 21).
4 USE AND MAINTENANCE
KEY
1 VENT fixture
2 EV1-EV2 coils
3 Upstream pressure fixture
4 Downstream pressure fixture
5 OFF-SET
Tester points on “HS” terminals
for fan Hz readings.
Fig. 21
Hertz Air pressure Heat output “30 BF”
mbar (80/60°C) kW (50/30°C) kW
70 1,24 10,2 11,3
90 2,05 14,6 16,1
110 3,06 16,6 18,2
130 3,71 20,5 22,5
150 4,94 24,5 26,7
185 7,52 29,4 32,1
TABLE 5
Hertz Air pressure Heat output “25 BF”
mbar (80/60°C) kW (50/30°C) kW
70 1,34 8,4 9,3
90 2,32 10,7 11,7
110 3,56 14,6 16,0
130 5,06 16,5 18,0
150 7,66 20,4 22,2
185 9,41 24,2 26,4
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