en
6
7
Flowmeter
The flowmeter measures and indicates the flow rate with a range of 5 - 35 l/min.
For the device to function faultlessly, the system must be flushed and free of grit.
Read the flow rate from the upper edge of the float.
8
Air separator
WARNING!
Scald danger!
During venting, the air discharged can reach temperatures of
more than 100 °C.
Î
In order to avoid scalding, pay attention to the sys-
tem temperatures!
The air separator is used for venting the water / glycol mixture
in the solar circuit. The air separated from the heat transfer fluid
gathers in the air scoop and can be discharged manually at the
air vent valve.
Î
Open the air vent valve and collect the discharged fluid in a
suitable container.
Î
Check the system pressure after venting and, if necessary,
increase it to the specified operating pressure
9
Maintenance
In the case of maintenance (such as a replacement of the pump) proceed as follows:
Î
Close the ball valve (4).
Î
Turn the slot of the flowmeter spindle by 90° anti-clockwise (see figure below).
The heat transfer fluid can now be drained from the pump.
Î
Open the drain valve (3).
If necessary, open the union nut at the pressure side.
Î
Now dismount the pump.
10 Safety devices
The pump station is equipped with a diaphragm safety valve which corresponds to
the relavant directives and regulations. For installation and operation, please pay
attention to the following advice:
• The safety valve has to be easily accessible. The efficiency of the valve must not
be influenced or disabled by barriers!
• The strainer or other restriction devices must not be mounted between collec-
tor (-field) and safety valve!
• The diameter of the discharge pipe must correspond to the diameter of the
valve outlet; the maximum length must not exceed 2 m; more than 2 bends are
inadmissible. When these values are exceeded, you have to install a discharge
pipe with larger dimensions. Do not use more than 3 bends and pipes longer
than 4 m!
• If the discharge pipe leads into a drain pipe with a funnel, the diameter of the
drain pipe has to be at least twice as large as the valve inlet. The opening of
the discharge pipe must be inclined downwards. It must be routed such that
the opening can be seen but does not present any risk to a person standing or
passing by.
• We recommend placing a container below the discharge pipe. If the safety valve
opens, the fluid will be collected and can be refilled into the system when the
pressure is too low.
