37
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
≥ DN65).
!
Please note
To prevent damage to the
appliance, connect the secon-
dary lines to the heat pump
free of load and torque
stresses.
The secondary lines must not
exert any pressure on the
heat pump casing.
!
Please note
Ensure the hydraulic connec-
tions on the secondary side
are tight in order to prevent
the formation of condensate
inside the heat pump.
■ With line entries, ensure the
diaphragm grommets on
the l.h. side panel are
seated correctly.
■ Make line entries air-tight.
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.
with overflow valve (see specification
on page 109).
Installation sequence
Hydraulically connecting the primary/secondary…
(cont.)
5848 246 GB
Installation
