30
Note
For diaphragm grommets, see
page 69.
Connecting the secondary circuit
1.
Equip the secondary circuit on site
with an expansion vessel and safety
assembly (to DIN 4757).
Fit the safety assembly to the on-site
line in the heating water return.
2.
Connect the secondary lines to the
heat pump (
7
≥ 28 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.
3.
Fill and vent secondary circuit.
4.
Thermally insulate pipes inside the
building.
Note
■ For diaphragm grommets, see
page 69.
■ 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.
with an overflow valve (see chapter
"Specification").
Installation sequence
Making the hydraulic connections
(cont.)
5546 273 GB
