4
CIVIC1-MOI-IT-W-ML-09-18-Rev.1
Watts Water Technologies, Inc.
EN
Installation
Mounting
Ensure correct environmental conditions (See Technical features).
CIVIC4 control unit
To guarantee the correct protection rating for the device it
must be installed in an electric panel manufactured according
to the laws in force for workplaces and that can also house
the power supply system. Mount the control unit on a rail (to
DIN EN 50022), using accessories for standard electric panels.
It can be installed on a mounting plate or in DIN rail modules.
UR13 (UR20S) detectors
To be used for wall-mounting (vertical), attached by plastic
screws and anchors. To install, insert a screwdriver in the
recess at the bottom of the enclosure to open it; avoid damage
to the sensor and do not touch the calibration devices.
The detectors must be correctly positioned for the system to-
in zones with constant natural air circulation
- in zones free of dust and dirt that could clog up the sensor
and make it ineffective
- never near running water, exhaust vents, windows, openings etc.
- at a suitable distance from the gas-fuelled equipment to
avoid the system taking inappropriate action due to possible
functional loss.
The positioning also depends on the type of gas that is to be
detected, in particular:
- UR13: Methane gas - high, about 20-30 cm from ceiling
- UR13: LPG - low, about 20-30 cm from floor
- UR13: CO - about 1.5 m from floor
For new plants, the detector must be installed at the last
possible moment so that typical worksite activities (particularly
welding, painting, sealing etc.), do not damage the actual
detector (particularly the sensing part).
UR20S detectors
See installation instructions on dedicated data sheet.
Electrical connections
Normal electric cables can be used. Still, if detectors are to
be installed in environments with high exposure to EMI, it is
advisable to use shielded cables. The detection system must
always be operating, so power switches or other devices that
could inadvertently make the detector inoperative must not be
used. Do not touch the sensing element and the electronic
circuits for any reason whatsoever. Tampering of any kind may
cause the system to operate incorrectly.
Ensure compliance with all current electric standards.
CIVIC4 control unit
The control unit must be powered at 12 Vac/dc; use
transformers with double insulation, sized for uninterrupt-
ed use for the power utilised (See Technical features).
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 dia-
grams contained in these instructions, using wires with a min-
imum diameter of 1.5 mm
2
for a maximum length of 50 m. for
each detector.
Commisioning
The CIVIC4 control unit and the UR13 or UR20S 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 devices connected
to the relay terminals is below or the same as the maximum
capacity of the contacts (See Technical features)
- if there are no detectors on the respective control unit
terminals, resistances 18 KOhm ¼W 5% are supplied as
standard (terminals C and S). In any case, these terminals
must be disconnected from the inputs where there are
detectors
- the detectors 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, jumper pairs
E5-E6, E7-E8, E9-E10, E11-E12 must be positioned for each
detector as follows (example for detector 1):
- 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 operat-
ing status through LEDs. Depending on the operating mode
selected through Jumper E1, in a normal situation (no alarm),
the LEDs and the relays are as follows:
positive operating logic: LEDs on; relays energised
negative operating logic: LEDs off; relays de-energised
If the negative operating logic is selected, the alarm relay can
be permanently or impulse controlled, depending on the
position of Jumper E2:
Warning
To enable the UR20S
sensors to operate, it
is also necessary to
set jumpers E3 and
E4 as instructed in the
chapter:
Description of
device.
