Ariston microSYSTEM 21 RFFI Installation Instructions Manual - Page 35
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1.5
A
CCESS TO THE
Important! Before any component is removed, the boiler
must be drained of all water.
1.5.1 Removing the pump pressure switch
1. Remove the cable of the pump pressure switch "W"
(Fig. 1.31);
2. Unscrew the pump pressure switch by using a spanner
on the nut "X"(F
. 1.32);
IG
3. Remove the pump pressure switch.
W
C
ATER
IRCUIT
W
F
. 1.31
IG
X
F
. 1.32
IG
1. 5. 2 Removing the safety valve
1. Loosen nut "Y" (F
. 1.33);
IG
2. Disconnect the discharge pipe work from below the
boiler;
3. Unscrew and remove the valve.
1.5.3 Removing the automatic air vent
1. Unscrew valve top "Z" (F
2. Remove valve complete with float (F
Z
Y
F
. 1.33
IG
. 1.34);
IG
1.35).
IG
F
. 1.34
IG
F
. 1.35
IG
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