87
IT
ENG
ES
The table below gives the values to set
when the supply gas is changed:
4 .2 .2
Adjusting valve pressure
(fig . 20)
Set maximum and minimum pressure on
gas valves as follows (fig . 20):
– Connect the column or a manometer to
the intake downstream of the gas valve .
In “25-30 BF” models, disconnect the
valve VENT pressure test point tube (5
fig . 18) .
– Remove the cap (1) from the modulator .
– Press the keys ( and ) at the same time for
a few seconds and completely open the
hot sanitary water faucet .
– Press the key
(Hi) .
– Remember
that
rotating clockwise
will increase pressure while rotating
anti-clockwise will diminish it .
– Adjust maximum pressure using the nut
(3) with a wrench to the maximum pres-
sure value indicated in Table 4 .
– Adjust the maximum pressure before
adjusting the minimum .
– Press the key
(Lo) while the sanitary
water tap is on, with
the water running .
– Lock the nut (3) in place, turn the screw/
nut (2) to the minimum pressure indica-
ted in Table 4 .
– Press the keys
(
and ) while kee-
ping the hot sanitary water running all
the time, and check that the maximum
and minimum pressures correspond to
the set values; if necessary correct the
regulation .
– Press the key () again
to quit the function .
– Put the pipe back on the valve VENT
pressure test point .
– Remove the manometer, remembering
to tighten the screw for closing the pres-
sure test point .
– Put the plastic cap (1) back on the modu-
lator and seal with a drop of coloured
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
BOILER
GAS
MODELS
PAR 1
METHANE 25
01
BF (G20) 30 02
LPG
25
03
(G30/G31) 30
04
METHANE
25
05
OF (G20) 30 06
LPG
25
07
(G30/G31) 30
08
3
2
1
Fig . 20
KEY
1 Plastic tap
2 Minimum pressure adjusting nut
3 Maximum pressure adjusting nut
Содержание GG BT 25 BF
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