Electrical Layout; Function; Display Elements - Raychem EMDR-10 Handbuch

2.5 Electrical Layout

- The length of the heating cable determines number and size of the fuse.
- The use of a FI safety switch (30 mA) is obligatory stipulated by Raychem!
- Local standards for electrical connection must be observed.
- The device may only be connected up by an authorized electrician.
- Use C-characteristic circuit breaker!
Maximum heating cable length for –10°c start-up temperature at 230 Vac
Heating cable GM-2X / 8BTV-2-CT
6 A (directly connected)
10 A (directly connected)
13 A (with contactor)
16 A (with contactor)
20 A (with contactor)

3. Function

The control unit has four LEDs for indication of the operating conditions and four dials for the
adjustment of different parameters.
The air temperature is measured by means of a temperature sensor. When the air temperature
falls below the value adjusted at the control unit, then the corresponding yellow LED will light up
and after approx. 10 minutes the moisture sensor is activated.
If moisture is present at the sensor then the corresponding yellow LED will light up, the heating
is switched on, and the red LED will light up. The heating cable remains on until
– the air temperature rises above the set value
– the moisture falls below the set value
– the air temperature falls below the adjusted lower temperature limit
and the set post-heating period has elapsed.

3.1 Display Elements

The LEDs indicate following operating conditions:
LED green
Device in operation (mains voltage)
LED yellow
Adjusted air temperature threshold fallen below
LED flashes in case of fault at the air temperature sensor (break or short circuit)
LED yellow
Adjusted moisture threshold exceeded
LED flashes in case of fault at the moisture sensor (break)
LED red
Heating cable energized
8
25 m
40 m
50 m
60 m
80 m