Control Elements; Switch Or Relay - Valeo Thermo AC Einbau- Und Betriebsanweisung

Thermo AC 2nd generation
8

Control elements

The control line should be kept as short as possible so that the voltage
drop is not too great. The minimum cable cross sections indicated in the
table must be applied.
Cable length <7,5m Cable length 7,5 - 15m
0.75 mm² 1.5 mm² *
2.5 mm² 4.0 mm² *
* The cable cross section is to be reduced in front of the heater
to 0.75 respective 2.5 mm².
If greater lengths have to be bridged, a relay must be used to split the
power circuits and limit the length.
For the PN of the connector at the heater and of the maiting plug, refer
to table Technical Data on page 51.Max. length: 10 meters and at least
2.5mm².
Kinds of control:
– Switch - para. 8.1
– Relay - para. 8.1, or via
– Pre-selection timer - para. 8.2

8.1. Switch or relay

When switching the heater with a switch or relay, these must be de-
signed for a voltage range of 18-30V DC and a current carrying capacity
of at least 1.5A.
Use preferably the Valeo switch: 2711011A, switch complete with light.
Bild 8: Valeo Switch
Switch
24V DC 1.5A
External control
input
5A
Cable length acc. to
table on page 41.
- Overcurrent protection device, all pole, 32A
Bild 9: Wiring diagram with switch, 2-pole
Control elements
rt
2
Valeo
Thermo AC
rt
1
3/PE/N AC 400/230V 50Hz
Consider prescribed protection!
See para.: „Installation", Fig. 7
41