22
GB
Filling, flushing and draining
Filling
To fill the solar energy system, the flow and
return ball valves must be in the "Gravity brake open"
(45°) position. Turn spindle [B] of the flow gauge to posi-
tion "S". The slot in the spindle is horizontal, the flattened
area points to the left. Connect the filling hose to the
flushing and filling valve [4a]. Connect the drain hose to
the flushing and filling valve [4b].
Open the flushing and filling valves to enable the solar
energy system to be filled.
Flushing
To flush the solar energy system, turn the flow
and return ball valves [1, 2] to the "Gravity brake open"
(45°) position. Turn spindle [B] of the flow gauge to posi-
tion "S". The slot in the spindle is horizontal, the flattened
area points to the left. Open the flushing and filling valves
[4a, 4b] and start the flushing process.
Flushing the pump
Position the spindle [B] in the flow gauge to
pass. (The slot in the spindle is vertical, the flattened
area is pointing downwards)
Any air retained in the pump can rise.
Return the spindle to the horizontal position and flush the
solar energy system as connected until all the residual air
is removed from the system.
If, during commissioning, a flow cannot be read from the
flow meter [9] after the flushing process,
run a test flush.
Draining
To drain the solar energy system, set the flow
and return flow ball valves to the "Gravity brake open"
(45°) position. Turn spindle [B] to the "Pass" position.
The slot in the spindle is vertical, the flattened area is
pointing downwards. Open the flushing and filling valve
[4b].
