Changing Thermometers; Safety Valve; Backflow Preventer - Meibes Solarstation S Technische Information Für Montage Und Betrieb

3. Installation
Spindle position:
1 Automatic
2 open (e.g. for flushing/filling)
3 closed
In Position 3 (closed) the tip of the spindle must be
pointed in the direction of the safety module to
ensure the safety function of the safety valve.
- Ball valve: Solar return (cold, pump branch)
arrow facing upwards.
- Ball valve: Solar flow (hot) downwards
Bottom shut-off fitting
The bottom shut-off is integrated in a small distributor
which also includes the connection for a diaphragm
expansion vessel and a drain valve.
The shut-off also functions as a volumetric flow
limiter in Position 1 to 2 (cf. Fig.).
Spindle position:
1 closed
2 open
3 closed (flushing/pump change)
20
forward flow return flow
Volume flow meter
reading edge upwards
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3. Installation

3.3 Changing thermometers

The thermometers are just inserted and can be replaced
simply by pulling them out. Be sure to replace a thermometer
taken out by one of the same type. Mind the colour
identification.
(Red lettering = forward flow; blue lettering = return flow)

3.4 Safety valve

The station is equipped with a safety valve.
The operating pressure can be checked on the
pressure gauge.
Safety valves :1/2"x 3/4"
Primarily triggering pressure : 6 bar
Firmly mount the safety subassembly that comes
with the unit at solar station's position intended for it.

3.5 Backflow preventer

The backflow preventer in the station prevent uncontrolled
circulation of the medium when the system stops, thus
counteracting any cooling down of the storage tank.
These are located in the foreword flow and return flow.
The non-return valve in the foreword flow (see Fig. 10)
can be manually opened (see Fig. 8) by turning the handle
to the right by approx 45° (see Fig. 9) from the end of position.
Bear this in mind and use it especially when draining the system.
Cracking pressure: ever approx. 300 mm water column
0° - Ball valve open, non-return valve in operation
45° - Ball valve and non-return valve open
90° - Ball valve closed
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