4.3.1
New fuel configuration
For access to the installer's parameters,
press simultaneously keys
and
for
5 seconds (3 fig. 14).
The parameters will scroll up and down
with the keys
and
.
The display pane will show the values of the
parameter PAR 1.
If, for example, the boiler in question is a
25/55 BF
fuelled by methane, the fol-
lowing setting SET 2 will appear:
To change the fuel to LPG, it is necessary to
set SET 6, by pressing the key
.
The standard display will automatically
return after 10 seconds.
The table below shows the SET settings to
enter when the type of gas fuel is changed.
4.3.2
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 “BF” models, disconnect the valve
VENT pressure test point tube (5 fig.
18).
– Remove the cap (1) from the modulator.
– Press the key
for a few seconds and
completely open the hot sanitary water
faucet.
– Press the key
.
– 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
while the sanitary
water tap is on, with the water running.
– Lock t he nut (3) in place, tur n t he
screw/nut (2) to the minimum pressu-
re indicated in
Table 4
.
– Press the keys
and
while keeping
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 regu-
lation.
– Press the key
again to quit the func-
tion.
– 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
99
ES
PT
ENG
Fig. 20
3
2
1
KEY
1 Plastic tap
2 Minimum pressure adjusting nut
3 Maximum pressure adjusting nut
SIT 845 SIGMA
HONEYWELL VK 4105M - SIEMENS VGU 56
BOILER
GAS MODELS
PAR
1
METHANE
--
1
25/55
2
30/55
3
BF
--
4
LPG
--
5
25/55
6
30/55
7
--
8
METHANE
25/55
9
OF/
--
10
LPG
25/55
11
--
12
Summary of Contents for MURELLE EV 25/55 BF
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