Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
General Instructions
6. Flow Diagrams
Filling curves
Fast filling
Refilling
∆p (bar)
Fast filling
Refilling
The flow rate and therefore the filling time
for fast filling are dependent on the position
of the ball valve lever.
Refilling
∆p (bar)
Fast filling
Refilling
At the end of the filling operation the
position of the ballvalve lever should be set
to "Refill".
An interlock prevents the appliance from
being closed if the lever is not in the "Refill"
position.
The refill volume can be checked by
comparing the before and after water meter
readings.
18
7. Method of Operation
NETZ
EIN/AUS
Fremdanschluß
- potentialfrei -
5
zur Heizungsanlage
If the system pressure falls to below the lower set value, for example through leakage
losses, then the compressor level monitor (sensing water shortage) opens the
changeover valve 3 and thereby permits fluid flow to the backflow preventer. The inlet
pressure moves the backflow preventer 5 to the flow position and the system is refilled
until the upper set limit is reached. The time period of the refill is monitored by the time
relay 9 and the operating time counter. Once the upper limit has been reached, the pump/
vessel unit level monitor (sensing „vessel full") closes the changeover valve 3 and the
backflow preventer goes to the shutoff position (open to atmosphere). The time relay then
returns to the outlet position.
If the inlet pressure falls to the operating pressure of the backflow preventer during the
automatic refilling operation, then the backflow preventer automatically goes to the shutoff
position (open to atmosphere). The shutoff position of the backflow preventer is indicated
in the viewing window (green visible = shutoff position).
General Instructions
9
3
10
0
0 0 0
0 0 0
0
5
15
0
bar
16
19
Werbung
Inhaltsverzeichnis
