Watts Industries Italia Srl
Watts EW089.308_en – rev.1
Gas detection Control Unit – CIVIC1
28/03/2011
Gas detection systems for industrial environments
2 of 4
CIVIC1 control unit
The control unit must be powered at 12 Vac/dc; use transformers
with double insulation, sized for uninterrupted use for the power
utilised (See Technical specifications).
For connecting the relay output use wires with a minimum
diameter of 1.5 mm
2
.
Prepare wiring connections according to the electrical diagrams
contained in these instructions.
UR13 or UR20S detector
Prepare wiring connections according to the electrical diagrams
contained in these instructions, using wires with a minimum
diameter of 1.5 mm
2
for a maximum length of 50 m.
COMMISSIONING
The CIVIC1 control unit and the UR13 or UR2S detectors are
safety control devices, therefore they must not be tampered with;
do not touch the sensor or the electronics for any reason
whatsoever. Carry out the following controls:
-
the power supply for the control unit must comply with the
values provided (12 Vac/dc
10%)
-
make sure the power consumed by any device connected to the
relay terminals is below or the same as the maximum capacity
of the contacts (See Technical specifications)
-
make sure the consumption of any device connected to the
open collector output terminals is below what is declared in the
technical data
-
the detector must be compatible with the type of gas to
monitor and correctly connected to the control unit.
Depending on the type of detector to connect it is necessary to
position jumpers E5 and E6 as follows:
-
the operating mode (positive or negative logic) selected must
be consistent with the system choices. As regards this, check
the position of Jumper E1 (See Operation)
-
the operating mode selected for the relay must be consistent
with the system choices. As regards this, check the position of
Jumper E2 (See Operation)
-
test the gas alarm and the detector failure condition events
(See Operation).
OPERATION
The Jumper E1 can be used to select the operating mode (positive
or negative logic).
The control unit signals its operating status through LEDs.
Depending on the operating mode selected through Jumper E1, in
a normal situation (no alarm), the LEDs, the OC output and the
relay are as follows:
positive operating logic: LEDs on; relay energised, OC output =
ON
negative
operating
logic: LEDs off; relay de-energised, OC
output= OFF
If the negative operating logic is selected, the alarm relay can be
permanently or impulse controlled, depending on the position of
Jumper E2:
Once the correct power is supplied, the control unit carries out the
following phases in sequence:
LED and buzzer tests (about 5 seconds)
Whichever operating mode is selected, the LEDs will switch on in
sequence and the buzzer will sound briefly.
Warm-up of detector (about 1 minute)
During this phase, which brings the detector up to the correct
operating temperature, the gas detection system is not
operational. During this phase, if the wiring connections are
correct, the control unit display shows the following:
Operating test (about 3 minutes)
Once the detector warm-up phase is complete, the device enters
the operating test phase. During this phase, all internal timing is
reset to ease operating verification of the detector (alarm
simulation). In this case, the control unit display shows the
following:
Keep the “Reset/Test” button pressed down for over 1 second to
interrupt the operating test phase. To test the detector correctly,
proceed as follows:
Gas alarm test:
Bring the test cylinder close to the detector grille and release a
small amount of gas (caution: if the gas is aimed directly at the
sensor, this will be permanently damaged). For CO testing of
detector, smoke produced by combustion can be used. The control
unit will signal the alarm as follows:
Keep the “Reset/Test” button pressed down for 1 second to
silence the alarm (if there is no gas remaining) and terminate the
operating test phase. To restart the Test phase, just keep the
relative button pressed down for about 6 seconds.
Caution
The repeated use or high concentration of
interfering substances (alcohol, lighter fluid etc.)
can cause permanent damage to the sensor and
put the device out of order.
Interface
Positive logic
Negative logic
Power supply LED
Green
Flashing 1 Hz
Flashing 1 Hz
Failure LED
Yellow
On
Off
Gas alarm LED
Red
On
Off
Alarm buzzer
No sound
No sound
Alarm relay
Energised
De-energised
Failure output
On
Off
Interface
Positive logic
Negative logic
Power supply LED
Green
Flashing 2 Hz
Flashing 2 Hz
Failure LED
Yellow
On
Off
Gas alarm LED
Red
On
Off
Alarm buzzer
No sound
No sound
Alarm relay
Energised
De-energised
Failure output
On
Off
E2
A
B
E2
A
B
E2
A
B
Po
sizio
ne
A
Rel
è di
al
la
rme
Comando per
m
anent
e
Po
sizio
ne
B
R
elè
d
i a
llar
m
e
Comando i
m
pul
si
vo
E1
A
B
E1
A
B
E1
A
B
Po
sizio
ne
A
Logi
ca
pos
iti
va
Po
sizio
ne
B
Logi
ca
n
egat
iv
a
E2
A
B
E2
A
B
E2
A
B
E2
A
B
E2
A
B
E2
A
B
Po
sizio
ne
A
Rel
è di
al
la
rme
Comando per
m
anent
e
Po
sizio
ne
B
R
elè
d
i a
llar
m
e
Comando i
m
pul
si
vo
E1
A
B
E1
A
B
E1
A
B
E1
A
B
E1
A
B
E1
A
B
Po
sizio
ne
A
Logi
ca
pos
iti
va
Po
sizio
ne
B
Logi
ca
n
egat
iv
a
Interface
Positive logic
Negative logic
Detector alarm LED
Red
Off
On
Alarm buzzer
Continuous sound
Continuous sound
Alarm relay
De-energised
Energised
(permanently or
pulsed depending
on E2)
Failure output
Off
On
E3
A
B
E6
Posizione (default)
per Sonda URx13
E5
E5
Posizione per
Sonda URx20..
E6
E3
A
B
E3
A
B
E6
Posizione (default)
per Sonda URx13
E5
E3
A
B
E3
A
B
E6
Posizione (default)
per Sonda URx13
E5
E5
Posizione per
Sonda URx20..
E6
E3
A
B
E5
Posizione per
Sonda URx20..
E6
E3
A
B
E3
A
B
(default) position of
detector UR13
position of detector
UR20S
Posi
tion A
Positive lo
gic
Posi
tion B
N
egati
ve
logi
c
Posi
tion A
Ala
rm re
la
y
Per
m
ane
nt co
ntr
ol
Posi
tion B
Ala
rm re
la
y
Pul
se co
ntr
ol
