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Filling the installation
1. Open the automatic bleed valves on the solar collectors.
2. Disable the ball valve non-return valves by turning the lever 45º.
3. Gradually fill the installation with the water-glycol mixture from the lowest filling tap in the circuit, using a pump. If there are no other
taps apart from the hydraulic unit taps, use the flow meter tap.
4. Close the automatic air bleed valves.
Note: the pump should left running for at least half an hour so that the air bleed is complete before the bleed valves are isolated.
Flow regulation
1. Check the nominal flow recommended by the panel manufacturer (approximate value 1 litre per minute and m2) and calculate
the flow required for your installation
2. Completely open all the circuit valves.
3. Start up the pump at "speed 1" and check if the flow indicated on the flow meter is higher or lower than required:
a. If it is lower increase the speed and check it again (step 3).
b. If it is higher calibrate the flow at the regulator, using a screwdriver. Adjust the step until the flow meter indicates the required flow.
SOLAR THERMAL CONTROLS
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