07/2015
Temperature Difference Controller TDC 3
Page 9 of 47
C.2 Electrical connection
Before working on the unit, switch off the power supply and secure it
against being
switched on again! Check for the absence of power!
Electrical connections may
only be made by a specialist and in compliance
with the applicable regulations.
Do
not use the controller if the housing shows visible damage.
Low-voltage cables such as temperature sensor cables must be routed separately
from mains voltage cables. Feed temperature sensor cables only into the left-hand
side of the unit, and mains voltage cables only into the right-hand side.
The customer must provide an all-pole disconnecting device, e.g. a heating
emergency switch.
The cables being connected to the unit must not be stripped by more than 55 mm,
and the cable jacket must reach into the housing just to the other side of the strain
relief.
Relay R1 is only suitable for standard pumps (20 - 120 VA) which are speed-
controlled via the controller. The internal wiring of the controller is such that residual
currents flow over relay R1 even in the rest condition.
Therefore under no circumstances may valves, contactors or other consumers with
low power consumption be operated on this output.
With hydraulic variant D1 „Solar + storage“ relays R1 and R2 are switched on
simultaneously to allow the connection of another load at R2.
Danger
Caution
Caution
Caution
Caution
Caution
