Making The Hydraulic Connections; Connecting Heating Water Flow And Heating Water Return At The Heat Pump; Connecting Heating Circuits And Dhw Cylinder In The Building - Viessmann Vitocal 300-A Installation And Service Instructions Manual

Making the hydraulic connections

Connecting heating water flow and heating water return at the heat pump

!
Please note
Mechanically loaded hydraulic connections lead
to leaks, vibration and appliance damage.
■ Connect supplied connecting hoses (bends)
so that they are free of load and torque stress.
■ To prevent transmission of any vibration, the
connecting hoses must not contact any other
components.
2.
2x
1.
3.
A
B
C
Fig. 9
Heating water return
A
Heating water flow
B
Hydraulic connection set (accessories)
C

Connecting heating circuits and DHW cylinder in the building

1. Equip the secondary circuit on site with an expan-
sion vessel and safety assembly (in accordance
with EN 12828).
Fit the safety assembly to the on-site line in the
heating water return.
2. Connect secondary lines to the lines of the
hydraulic connection set (accessories).
!
Please note
Mechanically loaded hydraulic connections
lead to leaks, vibration and appliance dam-
age.
Connect on-site lines so that they are free of
load and torque stress.
A
B
4.
Note
The connecting hoses can be shortened.
■
■ Completely encase connecting hoses in the supplied
thermal insulation.
!
3. Please note
Leaking hydraulic connections lead to appli-
ance damage.
Check the internal and on-site hydraulic
■
connections for leaks.
■ In the event of leaks, drain off liquid via the
drain valve. Check the seating of seal
rings. Always replace displaced seal
rings.
Observe information regarding filling and venting:
see page 50.
4. Thermally insulate lines inside the building.
5. Connect the drain hose to the safety valve.
Connect the drain hose to the public sewage sys-
tem with a fall and a pipe vent.
Installation sequence
17