Operation
For normal operation place the switch in the “AUTO” position and adjust the desired
pool/spa temperature setting. The “Power” LED indicator should always be on. (NOTE:
During initial power up, the “POWER indicator will blink for approximately 10 seconds
while it stabilizes temperature readings). The “Heating” LED indicator will show when
the system is collecting solar heat. If the nocturnal cooling function is enabled inside
the GL-235, the “Cooling” LED indicator will show when the system is dissipating
excess heat.
In the “AUTO” position, the GL-235 will heat the pool or spa (rotate valve to solar loop)
when the collector (solar) sensor temperature is higher than the pool/spa sensor
temperature by 4ºF or more AND the pool/spa temperature is less than the "Desired
Temperature" setting. The GL-235 will stop heating (return valve to pool loop) when
the two sensor temperatures get to within 1.5ºF OR the pool/spa sensor is above the
"Desired Temperature" setting.
To test the system, move the switch to “MANUAL TEST” and verify that both the
“Heating” and “Cooling” indicators light and that the valve(s) are in the solar loop
position. Move the switch to “MANUAL OFF” and verify that all indicators except
“Power” are off. The valve(s) should be in the normal recirculating loop position. If
the valve(s) positions are working in reverse, follow the instructions in section marked
“Low Voltage (LV) : Solar Valve”
to correct.
WARNING: If recirculate freeze
protection is being used, do NOT leave the switch in the “MANUAL OFF” position
during cold weather
. Also note that the switch does NOT turn power off to the GL-
235.
GL-235 high voltage output used for Booster Pump
Figure 4
5
8
