29
Connecting the secondary circuit
1.
Equip the secondary circuit on site
with an expansion 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 secondary lines to the heat
pump (
7
≥ 42 mm).
!
Please note
Avoid appliance damage.
Connect on-site secondary
lines to the heat pump so they
are free of load and torque
stresses.
!
Please note
Make tight hydraulic connec-
tions on the secondary side.
With hose outlets, ensure the
diaphragm grommets are
seated correctly. Seal hose
outlets with sealing tape if
necessary (see page 66).
3.
Fill and vent secondary circuit.
4.
Thermally insulate pipes inside the
building.
Note
■ In underfloor heating circuits, install a
temperature limiter on site to restrict
the maximum temperature of under-
floor heating systems.
■ Ensure the minimum flow rate, e.g. by
means of an overflow valve (see
"Specification" from page 127).
Installation sequence
Making the hydraulic connections
(cont.)
5546 267 GB
Installation
