Install Instructions

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4.4 Emptying the solar thermal system
1. Open the check valves in the ball valves in flow and return (1 and 2, see. fig. 1) by turning
the ball valves to a 45° position with an open-ended 14mm wrench.
2. Place a temperature-resistant collection container under the drain ball valve at the lowest
point of the solar thermal system.
Danger:
The discharged fluid can have very high temperatures. Place the
collection container so that people standing nearby are not endangered
when the solar thermal system is being emptied.
3. Open the drain ball valve at the lowest point of the solar thermal system.
4. Open the bleeding devices at the highest point of the solar thermal system, where available.
5. Dispose of the solar fluid in observance of local regulations.
5 Flow meter
The Flow meter is for measurement and display of the flow rate of .25 to 5 gpm (1-20 l/min).
In order to guarantee the flawless function of the measuring device the system must be flushed
and free from foreign substances.
0.5 – 3.5 gpm (1-13 l/min) 4 - 5 gpm (15-20 l/min)
Left scale:
Upper edge of the propeller
Right scale:
Lower edge of the
propeller
Example display = approx. 3 gal/min