Installation
Connecting the sensor
14
© Lutz-Jesco GmbH 2018
BA-40900-02-V01
Gas warning device
EASYCON GW
Operating instructions
7.5 Connecting the sensor
You can connect up to four sensors to the gas warning system. You can
also connect a PT 100 temperature sensor to every input circuit board to
monitor the room temperature.
4
3
2
1
5
Fig. 8: Input circuit board
Terminal
Function
Description
1
Temperature input
PT100
2
Temperature input
3
Measuring electrode
GN (green)
4
Counter electrode
WH (white)
5
Reference electrode
BN (brown)
Table 10: Clamp connection of the input circuit board
Precondition for action:
ü
The voltage supply has been disconnected and protected against
re-connection.
ü
The housing is open.
Resources required:
@
Sensors
@
Suction connection
@
Pipe clip
@
Wire end sleeves 0.25 mm²
Perform the following steps:
1.
Screw the pipe clip to the wall 30 cm above the floor.
2.
Fix the sensor in the pipe clip. The sensor opening must point down-
wards.
3.
Connect the connecting cable to the wall and lead it to the device.
NOTE
Electronic distortion of the measurement results.
Incorrect installation of the electrical cables can distort the measure-
ment results. As a result, the control of connected devices can be faulty.
ð
Do not route the connecting cable parallel to the mains and control
connections, and always with a clearance of at least 15 cm. Lay
connection junctions at an angle of 90°.
ð
Use a max. 50 m signal cable.
4.
Shorten the connecting cable to the required length. Apply a wire end
sleeve to the end of every wire.
5.
Open the device housing and lead the cable into the inside of the
housing through one of the cable screw connections on the under-
side of the housing.
6.
Connect the three coloured wires onto the input circuit board clamp
block. Comply with Table 10 “Clamp connection of the input circuit
board” on page 14.
i
This is a standard cable, the shield of which can function as a
fourth wire. The cable shield, however, is not connected.
Shorten the shield to the cable insulation or pinch it off.
ü
Sensor connection completed.
Testing the sensor functionality
You can check the electrical connection and the functionality of the con-
nected sensors.
Precondition for action:
ü
The installation has been completed in accordance with section 7
“Installation” on page 12.
ü
The device is activated.
Perform the following steps:
1.
In the main menu under System > Inputs, navigate to the “Sensors”
tab.
2.
Select “Sensor 1” and press the “Test” button. “Sensor test” will be
displayed for a short time.
4
The device checks whether the selected sensor has been connected
correctly.
3.
Repeat step 2 for all sensors. If the sensor test has not been success-
ful, the “Sensor error” alarm will be displayed. In this case, check the
sensor connecting cable and whether the sensor has been inserted
in the sensor bracket completely.
4.
Test the functionality of the sensors and actors (e.g. signal lamps and
signal bugles) with test gas. Comply with the specifications of the
test gas operating instructions. The display must show an increase of
the gas concentration. Given correspondingly set limit values, it must
also trigger actors (such as the signal bugle).
ü
Functionality tested.
i
Always inform the connected stations and departments before
triggering a test alarm.
