Velux TFF 200, Инструкция по применению, Страница: 20 / 56

20 VELUX
SECTION II: SOLAR PUMP STATION SECTION II: SOLAR PUMP STATION
5. Fill/Drain Fitting (6)
Use the fill and drain valves on the fill/drain fitting
to fill and drain the solar system (Figure 4).
To drain the system, the slot in the spindle must be
in a horizontal position (Figure 4b).
Figure 4a: Drain Fitting
completely open. Figure 4b: Drain Fitting
closed.
6. 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 13 l/min.
7. 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.
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.
Read volume flow
values at this edge
of the rotameter.
Figure 5: Flow Indicator.
13
11
9
7
5
3
1
4
Connection RP ¾"
female thread.
11
MEV connection,
flat sealing G¾"
male thread.
Figure 6: Membrane Expansion
Vessel Connection.