Air-Separator; Flow Meter - Grundfos Solar 15-80 130 Installation And Operation Instruction Manual

Warning
The pumped liquid may be scalding hot and under high pressure!
Take care that the flat gasket is well positioned. The pump impeller should not be damaged
when re-assembling.

7. Air-Separator

The air-separator (or manual bleed valve) is for venting the solar thermal system. It separates the
gases within the fluid in the top of the air-separator and can be vented through partial opening of the
vent screw, as shown below using a spanner.
Warning
The pumped liquid may be scalding hot and under high pressure!
After commissioning it is recommended to vent the system daily, and then weekly or monthly,
depending on the volume of air discharged.
It is recommended that operators of solar thermal systems should manually vent the system
twice per year to achieve optimal efficiency.

8. Flow meter

The purpose of the flow meter is for measurement and to display the flow rate of 0.5 - 15l/min. Flow
regulation is controlled using a screwdriver to open/close the ball valve. For faultless operation the
system must be flushed and free from foreign substances.
There are also two ball valves for filling and flushing the system.
For the flow meter to operate correctly it must be in the vertical position.
It is recommended that a filter is fitted into the system before the flow regulator to prevent
faulty operation from the presence of foreign substances.
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