4.2.2
Adjusting valve pressure (fig. 20)
Set. maximum. and. minimum. pressure. on.
gas.valves.as.follows.(fig..20):
5
–. Connect. the. column. or. a. manometer. to.
the.intake.downstream.of.the.gas.valve.
5
–. Remove.the.cap.(1).from.the.modulator.
3
–. Press.the.key.
.for.a.few.seconds.and.
completely. open. the. hot. sanitary. water.
1
faucet.
3
–. Press.the.key.
.
–. Remember. that. rotating. clockwise. will.
1
increase. pressure. while. rotating. anti-
2
clockwise.will.diminish.it..
–. Adjust.maximum.pressure.using.the.nut.
4
5
(3).with.a.wrench.to.the.maximum.pres-
2
sure.value.indicated.in.Table 4..
–. Adjust. the. maximum. pressure. before.
4
adjusting.the.minimum.
3
–. Press. the.
key. .
. while. the. sanitary.
water.tap.is.on,.with.the.water.running.
5
5
1
–. Lock.the.nut.(3).in.place,.turn.the.screw.
(2)..to.the.minimum.pressure.indicated.in.
Table 4..
3
–.
Press.the.keys..
and.
.
2
1
1
4
2
2
4
Codice/Code 8112910
Modello/Model MURELLE 25 OF ErP
Matricola/Serial n. 9999999999
PAR 1 = 9 (G20) / 11 (G30-G31)
PAR 2 = 5
84
the. hot. sanitary. water. running. all. the.
time,. and. check. that. the. maximum. and.
5
minimum. pressures. correspond. to. the.
set.values;.if.necessary.correct.the.regu-
lation.
–. Press. the. key.
ction.
1
–. Remove.the.manometer,.remembering.to.
tighten.the.screw.for.closing.the.pressu-
re.test.point.
3
while.keeping.
–. Put.the.plastic.cap.(1).back.on.the.modu-
2
4
1
3
2
KEY
1. Plastic.tap
2. Minimum.pressure.adjusting.nut
3. Maximum.pressure.adjusting.nut
3
.
. again. to. quit. the. fun-
4
ATTENTION
Before removing or refitting the
front panel of the boiler, open the
small upper plastic door.
lator. and. seal. with. a. drop. of. coloured.
sealant.if.necessary.
4.3
DISMANTLING THE CASING
(fig. 21)
The. casing. may. be. removed. completely. to.
facilitate. boiler. maintenance,. as. shown. in.
fig..
21..
Turn. the. panel. control.
forward.
access. to. the. internal. components. of. the.
boiler..
Fig..20
for.
Fig..21