Daystar Energy Products

Site index
Who we are
Newspaper Articles
Pool Heating
General information
How it works
How warm is it?
Owners Manual
Installation Manual
Panel Warranty
Hot Water
General information
How it works
Available models
What it saves
Other Products
Solar Attic Fan
Contact us
Contact Daystar Energy

Daystar Energy Products
Niagara Region
(905) 562-0077
Toronto Area
(416) 410-8368
(905) 331-8356

GL-235 Solar Pool Heating Control


  • Automatically Maximizes Solar System Heat Collection
  • Precise Calibrated Temperature Setting Dial
  • Single Model Handles all Systems - Old or New Pools, Spas, 12 and 24 Volt AC Actuators,
  • Automatic Switch Over from Solar Heating to Nocturnal Cooling if Desired
  • Standard 120/240 VAC 50/60 Hz Input and 12 and 24 VAC Output
  • Goldline's Proven Reliability and Performance
  • Industry's Only 5 year Limited Warranty


The GL-235 is designed to meet the need for easy installation, dependable operation and serviceability. The GL-235 incorporates unique, microprocessor based construction to ensure reliability and accurate performance. The GL-235 offers advanced operating features to provide differential temperature control, selectable high limit, programmable recirculation freeze protection, nocturnal cooling and optional booster pump control.

Automatic Heating: If the collectors are warmer than the pool water by 4 degrees or more, and the pool is below the selected desired temperature, the valve will rotate allowing heat collection. This heat collection will stop when the solar sensor falls to with 1.5 degrees of the pool temperature or the pool temperature exceeds the desired temperature set on the dial.

LED Indicators: Show the status of the system operation. Four highly visible LED's show 1) power to the control, 2) power output directing valves and/or pump to collect heat (heating), 3) power output directing valves and/or pump to dissipate heat (cooling), 4) sensor fault indicator shows sensor(s) not operating properly.

Single Setting For Desired Temperature: The GL-235 logic is set by a single dial adjustment with the desired pool/spa temperatures clearly indicated. The dial is calibrated with temperatures from 70F to 104F for quick and easy operation.

GL-235 Output: Rating is the industry standard 24 VAC. A jumper switches the output to 12 VAC for compatibility with older valve actuators. Output is fuse protected.

System Test Switch: Allows the user to manually override the automatic function of the GL-235 and verify operation.

Copyright © 2016 Daystar Energy Products Pool Heating   |  Hot Water   |  Contact Us   |  Company