SolaStat-Pool Users Guide.
Your SolaStat-Pool has a microprocessor at its core that intelligently and automatically controls
yourSolarHeatedPoolorSpaatgreaterefficiency.TheSolaStat-Poolmeasureswatertemperatures
at two places in the system and turns on a water pump at the optimum time. The pump moves
water from the solar collector into the pool.
The SolaStat-Pool has advanced features that protect the system from damage, run self diagnos-
tics, and will keep you informed as to what the SolaStat-Pool is measuring and what decisions it is
making.
You can set your maximum desired pool ‘COMFORT’ temperature as follows. Press the ‘NEXT’
button until the ‘SET’ light is ON. Then press the ‘+’ or ‘–’ buttons on the SolaStat-Pool to set your
‘Comfort’ Temperature. This value will be remembered even in the event of power interruption.
The Tropical Mode can be set to cool the pool at night if the pool temperature becomes too warm,
this is most likely to occur in very hot regions.
There are also accessories that let you record and graph in real time on your PC all measured
values and decisions made by your SolaStat-Pool as well as an option for a remote display (or
several with individual power supplies) of all the same information but 100’s of metres away.
Principle of operation.
The solar warm water collector sensor is called ‘ROOF’
The pool outlet sensor is called ‘POOL’
The user adjusable target pool temperature is called ‘SET’
The SolaStat-Pool is a differential solar warm water controller. The controller measures the
temperature at the ‘ROOF’ sensor and compares this to the ‘POOL’ sensor. If the difference be-
tween the roof and the pool is greater than the programmed upper limit (typically 5C) then the
pump turns ON and transfers heated water from the solar collector to the pool and replaces this
with cooler water from the pool. When this happens the pool heats up and the collector tends to
cool down. The heat difference is reduced to a point where the lower limit (typically 2C) is reached
and the pump turns OFF. This cycle repeats as long as the sun shines and there is a difference in
temperature, the pool heats up progressively this way.
Another way of thinking of this is to say;
·The pool temperature + the ‘Pump ON’ temperature is the value the solar collector (ROOF)
must rise to before the pump will turn on.
·And the pool temperature + the ‘Pump OFF’ temperature is the value the solar collector
(ROOF) must drop to before the pump will turn off.
User Adjustable Pool ‘COMFORT’ Temperature is the value the pump will be disabled at, to
stop more heated water from the solar collector entering the pool. Once the pool is 2C below the
Comfort temperature the pump will be enabled and the system is free to restart the Pump ON/
Pump OFF energy gathering as described above.
Tropical mode will cool the pool (at night). Tropical Mode is activated when the pool water tem-
perature has risen more than 2C above the Comfort adjustable value. When the solar collector is
cooler than the pool by the programmed ‘Tropical On’ Value (typically 6C), the pump turns ON and
transfers cooled water from the solar collector to the pool and replaces this with warmer water
from the pool. When this happens the pool cools down and the collector tends to warm up. When
this cooling difference is reduced to a point where the ‘Tropical Off’Value (typically 3C) is reached
the pump turns OFF. The pool cools down progressively as this cycle repeats until the pool has
reached the Comfort adjustable value at which time the controller exits Tropical mode.
Frost Adjustable Value can be enabled and will protect the solar collector from freezing in mild
frost areas. This will turn the pump on to move a small amount of water through the collector.
Heavy frost areas may need other solutions such as glycol based systems.
The SolaStat-Pool has other additional special features to those mentioned above.
·Sensor diagnostics: The SolaStat-Pool constantly checks the sensors. If a sensor is below -20C the
display reads ‘Lo’. If a sensor is above 140C the display reads ‘Hi’. If the roof sensor reads ‘Hi’, the pump is
disabled. If a sensor is outside the specified temperature range of -40C to 150C then the Display reads
‘SSd’ and the controller enters Smart Shutdown mode. When the display reads ‘SSd’the sensor has either
a steady light for a temperature above 150C (possibly shorted sensor or wire) or a flashing light for a
temperature below -40C (possibly open sensor or broken wire). For example if the ‘Roof’ sensor wire is cut
during some building work then the SolaStat-Pool display reads ‘SSd’, the ‘Roof’ light flashes and the
controller enters Smart Shutdown mode until the wire is repaired.
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