70
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 heat
pump (
7
≥ 28 mm).
!
Please note
To prevent equipment dam-
age,
connect on-site secondary
lines to the heat pump so that
they are free of load and tor-
que stresses.
!
Please note
Make tight hydraulic connec-
tions on the secondary side.
In the case of hose outlets,
ensure diaphragm grommets
are seated correctly. If neces-
sary, seal with sealing tape.
3.
Fill and vent secondary circuit.
4.
Thermally insulate pipes inside the
building.
Note
■ For diaphragm grommets, see
page 108.
■ 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
Hydraulic connections
(cont.)
5609 667 GB
