Connecting A Secondary Circuit - Viessmann Vitocal 200-S Installation And Service Instructions Manual

Connecting a secondary circuit

Refrigerant lines from/to the exter-
nal unit
Symbol
+
1. Equip the secondary circuit on site
with an additional expansion vessel
and safety assembly (in accordance
with DIN 4757, integral expansion
vessel, see page 72).
Fit the safety assembly to the on-site
line in the heating water return.
+
Explanation
DHW cylinder flow (heating water side)
Heating water return and DHW cylinder
return
Heating water flow
Installation sequence
2. Connect secondary lines to the heat
pump.
!
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.
Make tight hydraulic connec-
tions on the secondary side.
3. Fill and vent secondary circuit.
Connection
G 1¼
G 1¼
G 1¼
35