6
We reserve the right to make technical changes | 83055600dUK – Translation of the original instruction manual (HMD 2) | ait-deutschland GmbH
External return flow sensor
The return flow sensor (optional accessory) is functionally-rele-
vant for hydraulic integration of an isolating tank (multifunction
tank .). This has to be installed as follows:
ZUP
TRLext
HUP
1
Separation or multi-functional storage tank
2
Circulation pump in the separation storage
tank (heat pump circuit)
3
Circulation pump from the separation storage
tank (heating circuit)
4
External return sensor (Ø = 6 mm)
ZUP Charging loop, heat pump
HUP Discharging loop, heating circuit
Connect the return flow sensor coming from the isolating tank to
the circuit board of the heating and heat pump regulator.
Terminal diagram in the operating manual “Hydraulic mod-
ule 2““
Dismantling
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!
Softwareupdate / ‑downgrade
Software updates/downgrades can be carried out via the USB in-
terface on the control unit of the heating and heat pump control-
ler.
1. Expose the USB interface on the control unit.
Part 1 of the controller manual, program area “Service“, sec-
tion “Basic Information on the operation“
2. Insert a USB stick with the software into the USB interface
and follow the on-screen instructions.
IMPORTANT
Only install updates/downgrades that are cited as “valid
updates” (“Gültiges Updates”) in the screen list.
Dimensional drawings
All dimensions in mm.
1 Fastening holes (Ø 4,3)
2 Cable gland M16 x 1,5
3 Cable gland SW 20
Hot water sensor
The domestic hot water sensor is an optional accessory and only
functionally-relevant for a separate domestic hot water tank. You
may only use domestic hot water sensors which have been ap-
proved by the manufacturer of the heat pump.
IMPORTANT
The domestic hot water tank must be filled before con-
necting the domestic hot water sensor to the heating and
heat pump regulator.
If not already prepared at the factory, mount the domestic hot
water sensor (Ø = 6 mm) on the halfway level of the domestic hot
water tank – and always above the internal heat exchanger of the
domestic hot water tank.
1 Domestic hot water connection
2 Cold water connection
3 Heat exchanger
4 Domestic hot water sensor (Ø = 6 mm)
5 Hot-water tank
