27
This also particularly applies when connecting solar
thermal systems.
Connecting the secondary side
Fig. 20
Symbol Meaning Connection
Outdoor unit return (heating
water inlet)
G 1¼
Outdoor unit flow (heating
water outlet)
G 1¼
Heating water flow G 1¼
DHW G ¾
DHW circulation G ¾
Cold water G ¾
Heating water return G 1¼
1. Connect the "hydraulic connection set, heating cir-
cuit for installation on finished walls" (required
accessories) to the heat pump.
Separate installation instructions
Note
If the DHW circulation pipe is not required, tightly
seal the connection to the heat pump.
2. Only for systems with 2 heating circuits and without
heating water buffer cylinder:
For the heating circuit with mixer, fit the installation
kit with mixer (accessories) in the heat pump.
Separate installation instructions
3. Connect all hydraulic lines to the heat pump.
Connections to the outdoor unit
■
Max. torque for flow and return to the outdoor
unit: 50 Nm
■
Connection sets (accessories) are available for
hydraulic connection to the outdoor unit.
!
Please note
Mechanically loaded hydraulic connections
lead to leaks, vibrations and appliance dam-
age.
Connect on-site lines so that they are free of
load and torque stress.
4. Thoroughly flush the heating system.
Installation sequence
Connecting the secondary circuit (cont.)
5831412
Installation
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