pump. Continue filling the piping until water flows
from the upper hose into the basin or storage bucket.
Close the boiler drain and install the COMPONENT
#9 on the drainback reservoir.
4.14.3
STEP 3
– Run the pump to check operation
and flush impurities from the collector loop.
At this point it is recommended to run water through
the system to remove any solder flux residue or
other impurities that were introduced into the sys-
tem during plumbing. Water soluble flux should
have been used when soldering pipe joints in the
collector loop to facilitate system flushing. Set the
switch on the side of the SunEarth control to the
“ON” position. Allow the pump to circulate water
through the system for 15-20 minutes. While the
pump is running check the entire collector loop for
leaks and ensure that there is adequate flow.
4.14.4
STEP 4
– Check that Collectors are Draining
Back.
Turn the controller back to the ‘OFF’ position.
Allow time for the collectors and piping to drain into
the drainback reservoir. Observe the water level in
the drainback reservoir by means of the site glass,
visual flow meter or by checking with a dowel rod.
The water level in the drainback reservoir should
return to the original fill level after a few minutes.
If the water level does not return to the original fill
level, the system is not draining properly and may
freeze. If water level does not return to original
level, check format that the collectors are tilted
with riser tubes at 15° or more and that all piping is
sloped to drain at 2% or more.
4.14.5
STEP 5
- Drain the system to remove impuri-
ties.
Drain the cycled water out of the array by plac-
ing the hose attached to the lower boiler drain
P.16
TANK SENSOR
THERMOWELL
TANK SENSOR
JIFFY CLIP
fig. 9