30
+
A
B
C
D
E
F
Fig. 24
A
Outdoor unit return (heating water outlet): G 1
¼
(union nut DN 32, female thread)
B
Outdoor unit flow (heating water inlet): G 1
¼
(union nut DN 32, female thread)
C
DHW cylinder flow (heating water side): G 1
¼
(union nut DN 32, female thread)
D
Heating water return and DHW cylinder return:
G 1
¼
(union nut DN 32, female thread)
E
Heating water flow: G 1
¼
(union nut DN 32, female
thread)
F
Safety valve drain hose
1.
Equip the secondary circuit on site with an expan-
sion vessel and safety assembly (in accordance
with DIN 4757).
Fit the safety assembly to the on-site line in the
heating water return.
2.
Connect all the hydraulic lines to the indoor unit
(secondary circuit and connection lines from the
outdoor unit).
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.
3.
Thoroughly flush the heating system.
4.
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 in
the indoor unit. To vent, connect the hose to the
secondary circuit air vent valve. Route the hose
outwards.
Observe additional information regarding filling and
venting: See page 62.
5.
Thermally insulate lines inside the building. For
heat pumps with a cooling function, use thermal
and vapour diffusion-proof insulation.
Pipework inter-
nal
7
Min. thickness of thermal in-
sulation layer with
λ
= 0.035 W/(m
·
K)
≤
22 mm
40 mm
> 22 mm
60 mm
λ
Thermal conductivity
6.
Connect the safety valve drain hose to the drain
network with a fall and a pipe vent.
Note
■
In underfloor heating circuits, install a temperature
limiter to restrict the maximum temperature for
underfloor heating systems: See page 38.
■
Ensure the minimum flow rate, e.g. by means of an
overflow valve: See "Specification" on page 103.
Installation sequence
Connecting the secondary circuit
6150148
Installation
