8
Operating principles
Ball valve positions
Ball valve in the solar heating water flow
and in the solar heating water return
inside the Solar-Divicon:
■ In line with the pipe run:
– Open
■ Perpendicular to the pipe run:
– Closed
■ At 45° angle to the pipe run:
– Check valve open
– The 45° angle (towards the right or
left) is only required for filling and
draining the system.
Vitosol service instructions
Venting the solar heating water flow
(HVs)
Vent at the air vent valve on the air
trap.
Setting the flow rate on the solar side
In the case of a 3-stage solar circuit
pump: Adjust via the flow meter at the
solar heating water return.
In the case of a high efficiency solar cir-
cuit pump: Fully open the ball valve of the
flow meter. The flow rate is regulated
electronically.
Flushing and filling
Use the fill valve on the solar heating
water return.
Note
Optional connection of a manual solar fill
pump (solar thermal accessories) to
raise the pressure after venting.
Filling the DHW cylinder
1. Fill the DHW cylinder from the DHW
side.
Note
When the DHW cylinder is pressur-
ised, retighten the flange cover with a
torque of 25 Nm.
2. Check the fittings on the heating
water and DHW sides for tightness
and retighten if required.
3. Check the function of the safety
valves according to the manufactur-
er's instructions.
Commissioning, inspection, maintenance
Further details regarding the individual steps
5773 800 GB
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