Placement; Connection Steps For System - Danfoss ECtemp 850 IV Installation Instruction

Installation instruction
2 .2

Placement

The ECtemp 850 and power supply are designed for DIN rail mounting. When mount-
ing please be aware of the following conditions:
The ECtemp 850 is designed and approved to operate in the temperature
range –10 °C to 40 °C.
The ECtemp 850 is only IP20 protected, thus not water resistant.
The installer must ensure proper enclosure of the ECtemp 850 according to
national standards (electrical safety).
2 .3

Connection steps for system

Only authorized personnel is allowed to install the ECtemp 850.
When wiring up the ECtemp 850 and sensors, please be aware of the following
conditions:
When the ECtemp 850 is used in a dual system configuration, it is prefera-
ble that each sensor bus (DEVIbus™) can be connected and disconnected
via switches. During the installation of a dual system, each system must be
connected one at a time.
Be aware of maximum allowable power drain from power supply to sensors.
Below is shown the recommended order of the installation. Please refer to figure A
for connection of ECtemp 850 and refer to figure B–G for a guideline to connect the
heating elements to ECtemp 850.
1. Connect heating cables to the ECtemp 850
• Please notice that a single system ALWAYS uses the System A output relay
• When using external power relay, please refer to the connection diagrams.
2. Connect the power supply to the ECtemp 850
• Do not connect the power supply to mains yet
3. Connect sensors to the DEVIbus™
• When used as a dual system, only the sensors for System A can be connected.
For connection of System B please refer to chapter: "Installation of dual system".
4. Connect the power supply to mains.
12 | © Danfoss | 2019.07
ECtemp 850 IV
08097083 / VIMHE202