EsiWelma
®
s.r.l.
E191.604_En Rev. 4 dated 30/11/2018
Pag. 3/4
Technical Data
Control Unit UCE18
Power supply voltage
24VAC +/- 10%
Frequency
50/60Hz
Power consumption
32VA max (with battery under charge)
Sensor inputs
4 x UR.13/A
Control outputs
- 2 Electronic 12VDC (26W max total)
- 2 SPDT Relays 250V 5(3)A
Controlled valve type
Normally Closed or
Normally Open
Operation logic
positive (normally energized relays,
de-energize in case of alarm / fault)
“
VALVE TYPE
” Jumper
Valve type
NO = Normally Open (type
NC = Normally Closed
“
VALVE MODE
” Jumper
Valve output mode
C
ONT
=
continuous
(for NO type only)
P
ULSE
=
pulses (1 pulse every 10s)
Optical signals
(please refer to functional tables)
Green LED
Power presence / test
Control U. Yellow LED Valve(s) / control unit fault
Sensors Yellow LEDs Sensor fault
Red LEDs
Gas alarm
Sensors connection length cable 1.5mm
2
max 80m
Valve(s) connection length cable 1.5mm
2
max 80m
(one cable per valve)
cable 1.5mm
2
max 40m (2 x 13W)
Battery protection fuse
T3.15A 250V 5x20
Dimensions
174 x 106 x 56.5 mm
Protection
IP20 – EN60529
Room temperature
0…50°C
Room humidity
Max 90% R.H. non condensing
Sensors UR.13/A
Sensing element
Tin dioxide semiconductor
Intervention threshold
URG13/A
20% LEL methane (10000ppm)
URG13.P/A
20% LEL LPG (3720ppm)
URO13/A
200 ppm CO
Protection
IP44 (if correctly installed)
Average life time
5 years from installation date
Room temperature
0…50°C
Room humidity
Max 90% R.H. non condensing
Built-in relay
Operation
Positive logic (normally energized).
de-energizes in case of alarm / fault
Changeover contact
Voltage free 250V 5(3)A
Built-in battery charger
Charge voltage
13.8VDC
Charge current
0.5A max
Battery
12V 6÷10 Ah (not supplied)
Automatic intervention and current limit
Conformity
Regulations
Low Voltage
2014/35/UE
Electromagnetic Compatibility
2014/30/UE
Standards
EN50194
EN50270
CAUTION
Lifetime of sensors URG13/A, URG13.P/A e URO13/A is 5
years from installation date. It is necessary to substitute
them systematically before the end of the 5th year of use.
Average lifetime of sensors has been calculated considering a typical
usage in an environment free of pollution substances (gases,
solvents, etc.). A frequent presence or high concentration of these
substances may accelerate normal oxidation process of the sensing
element and consequently shorten its decay time (lifetime).
Functional tables
LEDs status
Functions
Green
LED
Control U.
yellow LED
Sensor
yellow LED
Sensor
red LEDs
Sensors preheating (1min)
Flash 1Hz
ON
ON
ON
TEST phase (3 min)
Flash 2Hz
ON
ON
ON
Normal operation
ON
ON
ON
ON
Gas alarm
ON
ON
ON
Flash 1Hz*
Valve fault
ON
Flash 1Hz
ON
ON
Sensor fault (up to 3)
ON
ON
Flash 1Hz*
OFF*
Sensor fault (all)
ON
OFF
Flash 1Hz
OFF
Ext. hooter alarm
ON
Flash 2Hz
ON
ON
General fault
ON
OFF
OFF
OFF
* for relative sensor(s) in alarm/fault
Output status
Functions
2 EV outputs
(NC valve)
Alarm relay
output
Fail relay
output
Hooter
output
Sensors preheat.(1 min)
Voltage
absence
De-energized
De-energized
Inactive
TEST phase (3 min)
Voltage
presence
Energized
Energized
Inactive
Normal operation
Voltage
presence
Energized
Energized
Inactive
Gas alarm
Voltage
absence
De-energized
Energized
Active
Valve fault
Voltage
absence
Energized
De-energized
Active
Sensor fault (up to 3)
Voltage
presence
Energized
De-energized
Active
Sensor fault (all)
Voltage
absence
De-energized
De-energized
Active
Ext hooter fault
Voltage
presence
Energized
De-energized
Active
General fault
Voltage
absence
De-energized
De-energized
Active
Simultaneousness of 2 or more events causes a combined manage-
ment of LEDs and outputs in accordance with a defined priority.
IMPORTANT
IN CASE OF ALARM FOR GAS LEAK OR CARBON
MONOXYDE PRESENCE ACT AS FOLLOWS:
Cut off all free flames and all gas-supplied devices
Do not switch-on or switch-off electrical lights or any other
electrically-supplied appliance, in order to avoid the
sparkling (cause of explosion for explosive gas)
Close the main valve of gas network or of LPG gas bottle
Open windows and doors to ventilate the rooms
Look for the cause of alarm, and eliminate it. If you are not
able to find and to eliminate the cause of the alarm, leave
the building, and, from the outside, call for emergency aids.
Environmental compatibility and disposal
This product was developed and manufactured using materials and
processes which take full account of environmental issues and which
comply with our environmental standards.
Please note the following for disposal at the end of the product life, or
in the event of its replacement:
For disposal, this product is defined as waste from electrical
and electronic equipment (“electronic waste”); do not dispose of
it as household waste. This applies particularly to the PCB
assembly.
Observe all current local laws and regulations.
Always aim for maximum re-use of the basic materials at
minimum environmental stress. Observe any notes on materials
and disposal that may be attached to individual components.
Use local depots and waste management companies, or refer
to your supplier or manufacturer to return used products or to
obtain further information on environmental compatibility and
waste disposal.
The UCE18 shipping case can be recycled. Retain it for future
use or in case of product return to the manufacturer
C NC NO
C NC NO
+ -
E V
M
E V
M
