30
Connecting the secondary side
Fig. 26
Symbol
Meaning
Connection
Heating water flow
G 1
¼
DHW
G
¾
DHW circulation
G
¾
Cold water
G
¾
Heating water return
G 1
¼
Safety valve drain hose
—
1.
Connect the safety valve drain hose to the public
sewage system with a fall and a pipe vent.
2.
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.
3.
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
4.
Connect the hydraulic lines to the heat pump.
!
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.
5.
Thoroughly flush the heating system.
6.
Check the internal and on-site hydraulic connec-
tions for leaks.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
In the event of leaks, drain off liquid via the
drain valve. Check the seating of seal rings.
Always
replace displaced seal rings.
Note
The secondary circuit air vent valve is located
inside the appliance. To vent, connect the hose to
the secondary circuit air vent valve and route out-
wards.
Observe additional information regarding filling and
venting: See "Filling and venting the secondary
side".
7.
Thermally insulate lines inside the building. For
heat pumps with a cooling function, use thermal
and vapour diffusion-proof insulation.
Installation sequence
Connecting the secondary circuit
(cont.)
51
17 700 GB
Installation
