Eco Online™ Solar Pool Heating System -- Installation Manual
© Copyright 2012 Optex Solar Pty Ltd. All rights strictly reserved.
Page 34
23
Frost Proofing and Winterization
Please note, while your potable HPDE/Silicon collector array does not require regular winter flushing,
your solar
booster pump may require winter flushing
. If this is the case and you do not want to run your system over winter
you can winterize your system by draining the solar side of the system, disconnecting the solar booster pump and
flushing the pump with clean water for storage over winter.
24
Optimizing Collector Pressure
Stream height
Collector Pressure
Pressure Adjustment Advice
No flow
Negative
Install ball valve brake (16 see plumbing diagrams) to
increase back pressure in return line
0.5 Meter
7.5 kPa
Pressure is ideal no action required
1 Meter
15 kPa
Pressure is still okay no action required
1.5 Meter
22.5 kPa
Borderline excessive pressure - install extra pool returns
or reduce pump power or install flow limiting ball valve
The use of a
water tight
non-return valve (8, see plumbing diagrams) will prevent drain
down which could result in water freezing inside PVC piping in frost prone areas. Always
use a
non-water tight non-return valve
in areas which can experience below zero
freezing conditions.
Non-water tight non-return valves have a small (6mm) hole drilled in the non-return
shutter flap to allow for slow drain down.
PVC piping should be installed with a slope such that all water drains out of the piping to
when the pump stops to ensure a freeze proof system. There should be no U-bend water
traps - these can freeze over and burst plumbing lines in the winter. Note: PE lines are not
affected as these are frost impervious.
