EsiWelma
®
s.r.l.
E202.602_En Rev. 2 dated 30/11/2018
Pag. 1/4
EsiWelma
®
s.r.l.
E202.602_En
it
Istruzioni di installazione
Centralina rivelazione fughe gas
Sensigas
®
UCE11
en
Installation instructions
Gas leak detection system
fr
Instructiòn de installation
Système de détection de fuite de gaz
en
English
These instructions must be kept together with the device.
General Information
The installation, the periodical inspections, or the devices
replacement must be done by qualified technicians.
The installation of a gas leak detection system for methane or
liquid petroleum gas (LPG), do not exempt from the compliance
to the safety rules and to all the laws in force concerning the
installation and the use of gas-operating-devices, for the
ventilation of the rooms and for the discharge of flue gases.
Installation
Mounting
Check that environmental specifications of the installation place are
compatible with the values listed on Technical Data.
Control Unit UCE11
A on DIN bar (EN50022-35 x 7.5) min length 120mm
B on wall, with 2 screws
C on panel front end using a DIN bar length 150mm and
n°2 50mm spacers, screws and washers
A
B
C
Sensors UR.13/A
On wall in an area subject to natural air circulation.
Never close to water jets, suction grids, windows, openings, etc.
At a suitable distance from gas devices in order to avoid
unexpected system actions due to functional losses.
In an accessible position for controls and inspections.
Respect the correct mount orientation
in order to ensure the normal
convection air flow inside the sensor.
URG13/A:
High, 20…30cm from the ceiling, to detect light gases
like methane etc.
URG13.P/A:
Low, 20…30cm from the floor, to detect heavy gases
like LPG, propane, butane etc.
URO13/A:
At about 1,5m from the floor, to detect carbon
monoxide (CO)
NOTE for sensor installation
In case of a new plant the sensor should be installed as latest as
possible so that typical working-place activities (particularly welding,
painting, etc.) cannot damage the sensors (particularly their sensing
element). In any case the installation must be completed before gas
devices and gas appliances are activated.
Wiring
Common electric cables can be used. However, when installing in
places subject to high electromagnetic interference, use of shielded
cables is recommended.
The UCE11 must be
permanently
powered at 24VAC.
There is no protection against accidental connection with
230V on the 24V side.
Use double insulation safety transformers; they should be sized for
continuous operation at rated power (refer to Technical Data).
Comply with all current regulations for wiring
Connections must be done in accordance with the diagrams
reported in the following operating instructions
Conform to indicated cable length and cross section
Connect only valves at 12VDC with absorbed power not greater
than 13W to EV output
Internal relay with positive logic operation that is always
energized contact in case of alarm or fault absence.
Never touch for any reason the sensing element or
electronic circuit. Any tampering might compromise
the correct system operation.
Commissioning
Control Unit UCE11 does not require any programming or
parameterization.
Check that the sensor is suitable for the gas type to be detected:
URG13/A = Methane sensor
URG13.P/A = LPG sensor
URO13/A = Carbon Monoxide (CO) sensor
Check that power absorbed by any devices connected to relay
terminals is lower than or equal to contacts maximum ratings
(please refer to Technical Data).
If no valve should be connected to EV output, insert a valve
termination Rv 1.8Kohm 1/2W (factory supplied) in the EV
terminal. This will avoid any wrong valve fault signal.
s
QAG13/A
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