Bedienungsanleitung Watts CIVIC 4 (Seite 4 von 12) (Englisch, Italienisch)

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4CIVIC1-MOI-IT-W-ML-09-18-Rev.1

Watts Water Technologies, Inc.

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 mm2. 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 mm2 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.

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