4 Commissioning the solar system
General
■Before commissioning, all piping, connections and saftey equipment should be checked to ensure that they are correctly installed.
■All
■Seal integrity must be tested when commissioning and a pressure test must be completed.
■Fill the complete solar system with Lochinvar/TiSUN solar liquid only. The mixing ratio should be adapted to local conditions.
■Never flush or pressure test the complete solar system with just water. Flushing the system with water only can cause a freezing hazard.
Filling, flushing and bleeding
■There is one fill valve with hose connection for filling, flushing and draining the solar system on both the safety group and sensor measurement section.
■Connect the pressure hose (forward flow) to the safety group’s filling connection under the pressure gauge and open fill/flush valve.
■Connect the flushing hose (return) to the flushing connection on the sensor measuring section and open fill/flush valve.
■Refer to “Technology, installation and commissioning: Operation,
■Open the supply ball valve (by turning the red thermometer handle
■Close return ball valve (by turning the blue thermometer handle clockwise, until it stops).
■If necessary, the supply and return check valve can be opened by moving the thermometer handles to the 45° position.
■Put sufficient solar liquid in the tank of a filling and flushing pump (not supplied). The mixing ratio should be adapted to local conditions in terms of freeze protection.
■Fill the solar system via the filling and flushing pump and then flush the solar circuit for at least 15 min. to purge all of the air out of the circuit.
■Close the fill/flush valve (return) with the filling and flushing pump running and increase the system pressure to 60 psi. The system pressure can be read at the pressure gauge.
■Close the fill/flush valve (forward flow) and switch off the filling and flushing pump.
■Open return ball valve (by turning the blue thermometer handle 90°
■The solar system features an air separator. Open the bleeder valve until the solar liquid exits free of air bubbles.
■Only if collector bleeder is installed: Bleed the system on the collector until the solar liquid exits free of bubbles.
■If necessary, increase the test pressure again to 60 psi and check the system for leaks. If the pressure gauge shows the pressure dropping substantially, you have a leak in the system.
■Set the operating pressure to 60 psi as prescribed by the system manufacturer
■Start up the circulation pump at maximum speed and allow liquid to circulate for at least 15 min.
■Remove the filling station hoses and screw the caps on the flushing and filling valves.
■Check the system again for leaks. Use the red and blue thermometer handles to fully open the forward flow and return ball valves.
■Activate speed control on solar control unit. The highest speed level should be set on the pump (phase control).
Note: The minimum speed set on the solar control unit must not fall below the pump’s minimum nominal speed. Note instructions for pump and solar control unit.
■Once the installation settings have been completed and checked, fit the solar station’s front insulation shell.
■Refer to the collector manufacturer’s recommendations for minimum flow requirements.
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