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We reserve the right to make technical changes | 83055600dUK – Translation of the original instruction manual (HMD 2) | ait-deutschland GmbH
BASIC WIRING OF THE HEATING AND
HEAT PUMP CONTROLLER
1 Operating element
2 LIN-BUS communication cable between control board and
control unit (wired in the factory)
3 Slot for optional “2.1-EP” circuit board
4 Control card of the heating and heat pump control
5 Connection terminals (X10 Modbus) for LINBus
communication cables to heat pump 1 and heat pump 2
6 Terminal block for electric heating element connection cable
7 Terminal block for heat pump 1 or heat pump 2 connection
cables (must be labelled accordingly)
8 Terminal block for heat pump 1 or heat pump 2 connection
cables (must be labelled accordingly)
9 Cable entries
10 Terminal block for 1~/N/PE/230 V voltage supply
11 Cable duct with covers
12 TRL return sensor terminal (on NTC8)
13 EVU bridges (must be removed when connecting a floating
contact)
Instruction manual for your appliance, “Connection layout”
and “Circuit diagrams” for your appliance type
NOTE
The inputs and outputs on the control board are assigned
by the terminal diagram of the hydraulic module. In addi-
tion, you will find the assignment on the switchbox cover.
Scope of delivery
●
Heating and heat pump regulator,
consisting of motherboard (with terminals) and control unit
(with status display, screen and “rotary pushbutton”) as an in-
tegrated component of the HMD 2 hydraulic module
●
External sensor for the surface mounting
●
Operating manual (in two parts)
●
Brief description of the heat pump control.
NOTE
Please fasten brief description in the vicinity of the device.
Electrical connections
DANGER
Danger of fatal injury due to electric current!
Electrical connections may be installed only by qualified
electricians.
Before opening the unit, disconnect the system from the
power supply and secure it from being switched back on!
WARNING
During installation and while carrying out electrical
work, comply with the relevant EN‑, VDE and/or local
safety regulations.
Comply with technical connection requirements of the
responsible power supply company (if required by the
latter)!
NOTE
The description of the basic electrical wiring and the wiring
diagram of the connection of hydraulic module and heat
pumps, refer to the operating manual of the hydraulic mo-
dule 2
Operating manual “Hydraulic module 2““
