9
Installation
C.2 Electrical connection
Danger
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 compli-
ance with the applicable regulations.
Do not use the controller if the housing shows visible damage.
Caution
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.
Caution
The customer must provide an all-pole disconnecting device, e.g. a
heating emergency switch.
Caution
The cables being connected to the unit must not be stripped by more
than 55mm, 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 (20-120VA) which are
speed-controlled viathe controller. The internal wiring of the controller
is such that residual currents fl ow over relay R1 even in the rest condi-
tion. Therefore under no circumstances may valves, contactors or other
consumers with low power consumption be operated on this output.
Caution
With hydraulic variant D1 „Solar+storage“ relays R1 and R2 are swit-
ched on simultaneously to allow the connection of another load at R2.
Caution
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