Flow Indicator; Air Jet; Connection Nozzle; Connecting The Valve Coupling For Membrane Expansion Vessels - Velux PSKR Directions For Use Manual

INStRUCtIoNS FoR INStAllAtIoN AND USE

Flow Indicator (7)

The adjustment of the flow rate of the thermal
carrier medium takes place by controlling the speed
levels (I, II, III) of the circulation pump and the throt-
tle in the fill/drain fitting (Figure 4).
The flow indicator shows the set flow rate (Figure 5).
The indicator range is between 1 and 13l/min.

Air jet (8)

The residual air in the thermal carrier medium is
collected in the air jet and can be vented manually
by means of the venting nipple (Figure 1, pos. 9). To
do this, attach the enclosed hose to the nozzle of the
venting nipple and collect the escaping medium in a
suitable vessel.
Remove the hose after venting. venting should
only be performed by trained professionals.
Uncontrolled venting can lead to malfunction of
the solar system due to loss of pressure.

Connection Nozzle (10)

An immersion sleeve with a G ½" male thread for
attaching a temperature sensor can be connected to
the flow ball valve (Figure 1, pos. 1).
Connecting the valve Coupling for
Membrane Expansion vessels (Fig. 7)
Pos. 17, 18, 20, and 21 are not included.
16 VELUX
CAUtIoN! Risk of scalding!
the air and the thermal carrier medium escaping
while venting the system can reach tempera-
tures of over 100°C.
Afterwards, firmly close the nipple. Monitor the
system pressure while venting. If necessary, refill the
solar system with thermal carrier medium.