EsiWelma Sensigas UCE11 User manual

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
METHANE GAS METANO

Pag. 2/4 E202.602_En Rev. 2 dated 30/11/2018 EsiWelma® s.r.l.
Jumper Setup
 Set jumper JP2 VALVE TYPE to NC for normally closed valve type
(deliver condition) or to NO for normally open valve type.
 Set jumper JP3 VALVE MODE only if normally open valve is used.
CONT position allows to set EV output constantly powered in
case of gas alarm, while PULSE position allows to set it powered
by impulses at 10s intervals.
Jumper for valve
mode selection
Jumper for valve
type selection
VALVE / TYPE
NC NO
VALVE / MODE
CONT. PULSE
NOTE: EACH CHANGE OF JUMPER SETUP MUST BE MADE UNDER POWER OFF.
Buttons functions
 OUTPUT TEST button: if pressed for at least 5s, starting from
normal operating condition, temporarily activates all outputs
(valve + relay) in order to check regular operation of intervention
and signal devices.
LED
TEST
RESET
OUTPUT
TEST
5s
E V C NC NO
M
Relay output
de-energized
EV output
voltage absence (NC valve)
voltage presence (NO valve)
Note: relay operation in positive logic
Energized relay = alarm / fault absence
De-energized relay = alarm / fault presence
 LED TEST button: temporarily turns all LEDs ON in order to check
their integrity.
LED
TEST
RESET
OUTPUT
TEST
When button is released the LEDs go
back to their status before the button
was pressed.
Operation
When the UCE11 is powered at 24VAC preheating phase starts up
(about 1 min) while LEDs will indicate:
 Green LED flashing (frequency 1Hz)
 Yellow LED steady on
 Red LED steady on
During this phase there is no voltage at EV terminals, so it is not
possible to energize the solenoid valve if NC type, while it is possible
to energize it if NO type. Further, the relay is not energized.
After preheating phase, the test phase follows (3 min) while it is
possible to check sensor operation. To this purpose, all internal
timings for alarm management are zeroed.
In this phase LEDs will indicate:
 Green LED flashing (frequency 2Hz)
 Yellow LED steady on
 Red LED steady on
During this phase there is voltage at NC solenoid valve, so it is
possible to open it using its manual actuator placed on the same
valve. The relay is energized.
Connect the battery to relevant terminals paying attention to polarity.
Operation test
During normal operation it is possible to simulate an alarm, in order to
check system functionality. Act as follows:
 Activate test phase (if no more active after preheating) holding
down RESET button for at least 5s.
 With cover fitted on approach a gas source to sensor grid, and
let come out a small amount of gas.
CAUTION: don’t spray the gas directly on the sensor,
otherwise it will be permanently damaged. Act to
increase gradually the gas concentration close to the
sensing element.
Sensors can be permanently damaged when exposed
to high or continuous concentrations of interfering
substances (like fresh paint, ammonia based cleaning
materials, alcoholic or silicone solvents etc).
To check carbon monoxide sensor a combustion smoke can
be used.
After these operation the control unit must indicate a gas alarm status
with these effects:
- Red LED flashing
- Solenoid valve driven to closed position
- Changeover of relay contact (C-NC closed)
To restore normal operation, once alarm status is over, press RESET.
LED
TES T
RES ET
REL AY
TES T
- Red LED reverts to steady on
- Relay contact reverts to initial
position (closed contact C-NO)
Note:
 An alarm or fault condition during test phase (3 min) causes
flashing of the relevant red or yellow LED at 2Hz frequency
instead of 1 Hz as indicated in functional table. This latter will be
valid for events starting from normal operating condition.
 Return to normal operating condition by pressing RESET button
is possible only if there aren’t any active alarms.
Open the solenoid valve manually.
The control unit continuously checks connections integrity both
for sensor and valve.
The sensor will perform best if used in an area where the
only gas or vapor present, besides fresh air, is the gas or
vapor that you wish to detect.
If used in an area contaminated with relative high concentration
of different interfering substances (like fresh paint, ammonia
based cleaning materials, alcoholic or silicone solvents etc.),
false alarms may occur.
IMPORTANT
We recommend to repeat operating test at least once a year or
after a long stop period and in any case every time that a sensor
is replaced.

EsiWelma® s.r.l. E202.602_En Rev. 2 dated 30/11/2018 Pag. 3/4
Technical Data
Control Unit UCE11
Power supply voltage 24VAC +/- 10%
Frequency 50/60Hz
Power consumption 21VA max (with battery under charge)
Sensor inputs 1 x UR.13/A
Control outputs - Electronic 12VDC (13W max)
- SPDT Relay 250V 5(3)A
Controlled valve type Normally Closed or
Normally Open
Operation logic positive (normally energized relay,
de-energizes in case of alarm / fault)
“VALVE TYPE” Jumper
Valve type NO = Normally Open
NC = Normally Closed
“VALVE MODE” Jumper
Valve output mode CONT = continuous
(for NO type only) PULSE = pulses (1 pulse every 10s)
Optical signals (please refer to functional tables)
Green LED Power presence / test
Yellow LED Sensor / valve / control unit fault
Red LED Gas alarm
Sensor connection length cable 1.5mm2 max 80m
Valve connection length cable 1.5mm2 max 80m
cable 1.5mm2 max 40m (13W)
Battery protection fuse T3.15A 250V 5x20
Dimensions 130 x 106 x 56.5 mm
Protection IP20 – EN60529
Room temperature 0…50°C
Room humidity Max 90% R.H. non condensing
Sensor UR.13/A
Sensing element Tin dioxide semiconductor
Alarm 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 250VAC 5(3)A
Built-in battery charger
Charge voltage 13.8VDC
Charge current 0.5A max
Battery 12VDC 4÷6 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 Yellow LED Red LED
Sensor preheating ph. (1 min) Flash 1Hz ON ON
TEST phase (3 min) Flash 2Hz ON ON
Normal operation ON ON ON
Gas alarm ON ON Flash 1Hz
Valve fault (*) ON Flash 1Hz ON
Sensor fault ON Flash 1Hz OFF
General fault ON OFF OFF
Output status
Functions
output
EV
(NC valve)
relay
output
Sensor preheating ph. (1 min) Voltage absence De-energized
TEST phase (3 min) Voltage presence Energized
Normal operation Voltage presence Energized
Gas alarm Voltage absence De-energized
Valve fault (*) Voltage absence De-energized
Sensor fault Voltage absence De-energized
General fault Voltage absence De-energized
(*) A valve fault is detected by short circuit (normally closed valve) and open
circuit (normally open valve).
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 the 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 UCE11 shipping case can be recycled. Retain it for future
use or in case of product return to the manufacturer.
C NC NO
E V
M

Pag. 4/4 E202.602_En Rev. 2 dated 30/11/2018 EsiWelma® s.r.l.
Throubleshooting
Effect Possible cause
NC valve does not open  Valve not connected
 No power
 NO valve type instead of NC type
 Incompatible valve type (power
consumption > 13W)
 Alarm not reset or current
 Current sensor preheating phase
 Defective or not connected sensor
 Fault presence
NO valve does not close  Valve not connected
 Sensor not in alarm condition
 Cable interrupted
RESET button does not
restore default conditions
 Sensor still in alarm condition
 Control unit fault
(yellow LED OFF)
Output Test button does
not work
 Current fault / alarm
Connections
C
E V
G
G0
S A +-
C
NC NO
Batt
G 24VAC Power supply, voltage
G0 24VAC Power supply, system neutral
C Sensor input (common)
S Sensor input (signal)
A
Sensor input (power)
E Valve output 12VDC
V Valve output 12VDC
C Relay output (common)
NC Relay output (normally closed contact)
NO Relay output (normally open contact)
Batt + Battery output +
Batt - Battery output -
Layout
s
LYC11
LED
TEST
RESET
OUTPUT
TEST
G G0
24V C S A E V C NC NO
+ -
Batt. VALVE / TYPE
JP2
VALVE / MODE
NC NO CONT. PULSE
JP3
F1
3A
1
2
3
4
5
6
7
11
12
8
9
10
1 Battery connection terminal 7
Valve Type Jumper
2 Battery protection fuse T3.15A 8 LED Test button
3 Control Unit /sensor status LEDs 9 OUTPUT Test button
4 Remote sensor terminal 10 RESET button
5 24VAC power supply terminal 11 12VDC valve terminal
6
Valve Mode Jumper
12 Relay output
Due to our policy of continuous product improvement,
specifications are subject to change without notice.
Wiring diagrams
Control Unit UCE11 with sensor and 12VDC solenoid valve. 12V buffer battery.
Control of auxiliary devices (signal lamps or air extractors).
Y1
24V AC
N1
G
G0
G
G0 E V
C S A B1
+-
L1
M1 V1
230V AC
N
BATT.
M
L
C S A
NO NC
C
N1 Control unit UCE11
B1 Sensor UR.13/A
Y1 Solenoid valve 12VDC
V1
Battery 12VDC 46Ah (not supplied)
L1 Signal lamp 230VAC
M1 Extractor
Control unit UCE11 with sensor and 230VAC solenoid valve.
Control of auxiliary devices (signal lamps, etc.).
24V AC
N1
G
G0
G
G0
C S A B1
+-
230V AC
N
BATT.
L
C S A C
Y1
E V
L1
M
NO NC
Rv
1.8Kohm 1/2W termination
resistor to be used in place
of solenoid valve
N1 Control unit UCE11
B1 Sensor UR.13/A
Y1 Solenoid valve 230VAC
Rv Termination resistor EV 1.8Kohm 1/2W (factory supplied)
L1 Signal lamp 230VAC
Dimensions
Control unit UCE11
130
106
89
111
56.5
47.9
31
s
LYC11
LED
TEST
RESET
RELAY
TEST
Sensors UR.13/A
Dimensions in mm