Determining The Flow Rate And Adjusting If Required - Viessmann VITOSOL 100-F Service Instructions Manual

Filling and flushing the solar thermal system...
Flow indicator
H
Fill valve
K
Stagnation heat sink
L
01. Open shut-off valve (flow)
(thermometer) clockwise through 45°.
02. Close shut-off valve (return)
valve (thermometer) clockwise through 90°.
03. Close shut-off valve
F
the slot on the adjusting screw to position "S".
Fig.3
04. Connect hoses of flushing and filling facility
drain valve and fill valve
G
05. Fill the container of flushing and filling facility
with heat transfer medium.
06. Open drain valve
G
07. Start the fill pump of flushing and filling facility
08. Observe the fluid level in the container and top up
with heat transfer medium if necessary to prevent
any air entering the solar circuit. Leave the fill
pump of flushing and filling facility
no more air bubbles rise to the top of the container
(at least 20 to 30 min).
Note
Briefly open shut-off valve
the flushing process: Using a screwdriver, turn the
slot on the adjusting screw above the flow indica-
tor to the vertical position. Any air that remains in
the return is eliminated.

Determining the flow rate and adjusting if required

Check the flow rate at the top edge of the float.
B : Turn the ball valve
: Turn the ball
O
: Using a screwdriver, turn
N
.
K
N
and fill valve .
K
N
running until
N
F towards the end of
Commissioning, inspection, maintenance
(cont.)
Expansion vessel
M
Flushing and filling facility
N
Shut-off valve (return)
O
09. Close drain valve
ing and filling facility
charge pressure is reached.
Notes on residual ventilation
Even after thorough ventilation, some dissolved air
will still remain in the heat transfer medium. This
will be released as the temperature rises, and will
be discharged via air separator
10. Close fill valve
and filling facility
The pressure must not drop for at least 30
minutes.
11. Open shut-off valve
the slot on the adjusting screw above the flow indi-
cator to the vertical position.
12. Turn shut-off valves
positions (0°).
13. Set the circulation pump to manual mode.
Open the air vent valve on air separator
Leave the circulation pump running until the float
in the flow indicator holds a constant position
to
while the pump is running.
Note
If there is air in the system, the float will oscillate.
.
G . Leave the fill pump of flush-
running until the required
N
.
E
; stop the fill pump of flushing
K
.
N
: Using a screwdriver, turn
F
and to their operating
B O
E
.
9