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Aqua Solar Digital Solar Control System
The Aqua Solar Digital Solar Control System is a differential temperature control for
solar heating of pools, spas, and hot tubs. The Aqua Solar is available in 3 models;
AQ-SOL-LV, AQ-SOL-LV-TC and AQ-SOL-LV-SP. These models provide differ-
ential temperature control with an adjustable calibrated water temperature high limit.
Both offer a built-in digital display for solar, water, and ambient temperature infor-
mation as well as programmable set point temperature. Automatic nocturnal cooling
(for pools that overheat in hot climates) and recirculate freeze protection functions
can be enabled/disabled via internal jumpers. The AQ-SOL-LV-TC additionally pro-
vides a filter pump time clock, programmable in 15-minute intervals with multiple
ON/OFF times. The AQ-SOL-LV-SP model provides a solar priority function—one
of the optional high voltage relays can be used to remove power from the conven-
tional heater whenever solar heating is available. This maximizes the heat contribu-
tion from solar. Front panel indicator LED’s also provide immediate feedback of
system state such as heating, cooling, and sensor fault.
Specifications
Power: 105-130VAC, .5A 50/60Hz. or
195-250VAC, .3A 50/60Hz
Valve Output: 24VAC, 20VA, .85A max.
Industry standard 3 pin connector
Relay Outputs: DPST isolated contacts; 3HP@240V, 1.5HP@120V, booster
pump, pool sweep interlock, or filter pump; 1 relay supplied with
AQ-SOL-LV-TC, maximum of 2; order relays separately (part no.
AQ-RELAY); relays are industry standard
Sensors: 2 required for "SOLAR" and "POOL" temperatures; 3
rd
sensor
("AUX") is optional—for display and/or recirculate freeze
protection; (all sensors are thermistor type, 10K@25ºC/77ºF,
additional freeze snap switches may be wired in series with the
"AUX" sensor when used for recirculate freeze protection)
Field Selectable options
C/F Temperature display in Celsius or Fahrenheit (factory default)
Cooling Enables or disables (factory default) operation to cool the pool
Recirc. Frz. Enables or disables (factory default) recirculate freeze protection
Solar Override Enables or disables (factory default) override of the filter pump
relay when solar heat is available.
Control Logic
Heat diff.: 4ºF on, 1.5ºF off
High Limit: 70-104ºF calibrated scale
Recirc. freeze: On when AUX sensor less than or equal to 34ºF
Off when AUX sensor greater than or equal to 36ºF
Cool diff.: -8ºF on, -3ºF off
