Bosch BSS250E-2 Installation And User Manual page 13

header pipe, diagonally opposite from the inlet and returns to
the "Solar Return" on the tank.
18. Install the air bleed valve onto the outlet of the panels at the top
Left hand corner of the panels.
19. NOTE: The air bleed valve needs to be commissioned and checked to ensure the
valve top is opened and that when the pump operates the valve seals properly. This
can be done by listening to the valve to ensure air is not entering the pipe work. Let
the pump run for 3-5 minutes if air is still bubbling into the tank at this stage the
valve is not sealing.
20. Mount the panel temperature sensor to the Air bleed T piece
and the tank sensor into the top (Middle of tank) sensor
drywell.
21. Drill a 10mm hole in the roof near the sensor and run the
sensor leads through the hole drilled in the roof, once this is
done seal the hole with silicone.
22. NOTE: Do not use the same hole as the pipe work as movement of
the pipes will case the cable to break or short circuit.
23. Install the Solar Hot Pipe and Solar Cold Pipe to run between the storage tank and
the collectors. Both pipes should be DN15 (1/2") copper pipe, with 13mm or thicker
synthetic rubber insulation (Armaflex, Bradflex). All insulation should be protected
from UV degradation by two thick coats of paint, or by covering with ductwork. Pre-
lagged pipe (often green PVC or plastic insulation) is not suitable for thermal
insulation purposes – only use foamed synthetic rubber insulation.
24. Connect the Solar Hot Pipe and Solar Cold Pipe to the heater and to the panels.
NOTE: Ensure that the water inlet from the system pump flow is to the lower right edge of
the array, and that the water exits the panels diagonally opposite and through the sensor
outlet fitting, and returns to the solar return on the tank.
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