2
1
WALL FIXING
Sicurgas P21 and P22 is a device that through
a sensitive sensor, detects natural gas
concentration (P21) and LPG concentration
(P22) in domestic environments. Sicurgas P21
and P22 triggers a PRE-ALARM when the gas
concentration in the air is much lower than
the lower explosive limit (LEL), immediately
switching on a red warning light and activating
a warning device (e.g. modem). If the pre-alarm
condition persists with consequent increase
in gas concentration with respect to the LEL,
Sicurgas goes into ALARM status, adding an
acoustic warning to the light signal.
Sicurgas simultaneously triggers a relay to
command a gas shut-off valve.
The Sicurgas P21 and P22 gas detectors have FAIL-
SAFE operation if connected to a normally closed
(NC) manually reset valve. This means that the gas
shut-off valve closes interrupting the outflow even
in case of a power failure.
For enhanced safety, several Sicurgas detectors
can be used, connected to the same gas shut-off
valve. For example P21 (P22) can be installed in
the room with the boiler and another in the kitchen
to control the stoves.
Sicurgas is supplied with a base suitable for
installation on recessed boxes with 3 modules or
on a round box. Unscrew the base-lid fixing screw
and turn the lid upwards.
Fix the base to the wall (see paragraph 3) or on
the recessed box and insert the connection cables
through the rear slot.
ATTENTION
Installation of the gas detector does
not exempt from complying with all the rules
regarding the features, installation and use
of gas appliances, ventilation of rooms and
exhaust of combustion products described in
EN implementation standards of art. 3 of law
1083/71 and of national legislation in force.
Before installing the appliance, carefully read
this instruction booklet.
GREEN LED
appliance powered
YELLOW LED
detector faulty
RED LED
ALARM gas concentration
beyond alarm threshold
for 503 recessed boxes
with 3 Modules
for round recessed
boxes
A
B
I N S T A L L A T I O N
S i c u r g a s
B 60 mm
A 83.5 mm
fixing screw
base-lid
ATTENTION!
DO NOT TAMPER WITH THE APPLIANCE AS
THIS COULD CAUSE ELECTRICAL SHOCKS OR
MALFUNCTIONING
After fixing and connecting the appliance (see paragraph 4), refit the lid on the base, making sure that the
two teeth on the lid perfectly fit in the two upper guides. Retighten the fixing screw and apply the sticker in
the seat indicating the date of replacement.
knockout area
to increase the
space necessary
for wiring
IT IS POSSIBLE TO SMELL GAS
BEFORE THE APPLIANCE TRIGGERS
THE ALARM.
Summary of Contents for P21
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