Vertex
Solar™ Pool & Spa Heating System
-- Installation & User Manual
© Copyright 2019 Optex Solar Pty Ltd. All rights strictly reserved.
Page 37
2)
3)
The supplied 40°C thermostat (with secondary failsafe) will disconnect the pump(s) positive wire if the temperature
of the water in the return line is about 40 to 42°C. The temperature differential across the solar collector array will
mean that your spa temperature should be at or below 40°C during trigger.
27.1
Adjusting the Spa Temperature
If you require a lower spa temperature, we recommend you use ball brake valve (see plumbing diagrams) to
constrict flow slightly. This will increase the temperature differential across the collector array and turn the system
OFF faster.
Over-temperature thermostat assembly MUST be installed in a sheltered location away
from rain and sun expose and in such a way that any water droplet condensation on pipes
or wires cannot run inside the assembly.
Adequate insulation of the Aluminium U-channel is required, otherwise the exposure
of the U-channel to cooler external air may prevent the U-channel and hence the face
of the thermostat from reaching the cut-off temperature.
