This is the controller only. No sensors or valves included. For a Control
Package with sensors and valves please click here. For sensors please click here. For valves click here.
Hayward (Previously Goldline)
AquaSolar Solar Pool Control Unit - Controller Only. Model GL-235
Top-of-the-line design, construction, and performance are the hallmark
of the Hayward GL Series, Hayward's premier line of
swimming pool/spa solar heating system controls - a series where all
the optimum features available today come as standard on the Hayward
The Energy SuperMarket’s top selling brand,
the Hayward units earn a solid 5
star plus rating in our Consumer Value
Hayward units are backed by the only
5-year factory warranty in the industry. Plus
The Energy SuperMarket offers the lowest on-line factory direct pricing
GL-235 Hayward Microprocessor Solar Pool Controller
Microprocessor Solar Pool Control Series is designed to meet
the need for easy
installation, dependable operation, and serviceability... for the
definitive choice in swimming and spa
» The GL-235
LV/HV offers advanced operating features to provide differential
temperature control, selectable high limit, programmable recirculation freeze
protection, nocturnal cooling, and optional booster pump control.
Plus the GL-235 incorporates unique, microprocessor based
construction to ensure reliability and
Pool/Spa Heating Control Feature
• Maximizes solar system performance by
• increasing system efficiency!!!
Microprocessor based ensures total digital
• Selectable high limit
• Automatically switches from heating to
Re-circulation freeze protection [field
• Nocturnal cooling [field
• 75°F to 104°F precision calibrated temperature
• dial with "solar off"
The GL-235 automatically maximizes
the heat collection of any solar pool heating system, being
totally compatible with all new or existing systems, new or
existing pool/spa applications, and new or existing 12VAC or 24VAC actuator
The pool/spa temperature level is set by a single dial
adjustment with the desired temperature using a clearly indicated dial. This
dial is highly calibrated for quick and easy, user-friendly operation.
Plus, the GL-235 will automatically determine if the water should
be solar heated or cooled, thus maximizing your swimming
The GL-235 LV/HV unit utilizes the existing pool's
circulation pump for solar heat pick-up. It works in conjunction with the Hayward
/Jandy 3-Way 12VAC Valve and Actuator model JVA-PKG, or with
other manufacturer's 12VAC valves.
This unit can operate
either 12 or 24 volt valves. In addition, the GL-235 LV/HV will also
operate a separate pump that is dedicated to solar circulation only. The GL-235
LV/HV model has one low-voltage output for controlling a single
valve and a second high voltage output for controlling a filter
pump or solar booster pump.
The pump can
be sized up to 1HP with 120VAC and 2HP with 240VAC.
Specific Applications: Designed for both residential
and medium-duty commercial pools in the small to
mid-size pool heating range when the GL-235 LV/HV controller needs a Hayward/Jandy Valve, plus operate a separate pump that is dedicated to
solar circulation only.
Note: The unit has a front panel switch
which provides for nocturnal pool cooling instead of heating. Cooling is
used in conjunction with the pool's filtration pump being allowed to run
during the early dawn, cooler hours.
Installation Note: The GL-235 is
designed for outdoor use. For safety, the GL-235 must be a minimum of 5
feet horizontally from pool or
If the water within the collectors is warmer than the
by 4 degrees or more, and the pool is below the selected
temperature, the valve will rotate allowing heat collection.
The heat collection will stop when the solar sensor output falls to
within 1.5 degrees of the pool temperature or the pool temperature
exceeds the "desired temperature" set on dial.
• Automatic Nocturnal Cooling
[Field selectable option]
Swimming pools often become too warm from the sun
on their own
during the height of the summer season.
GL-235 comes standard with nocturnal cooling logic, which can
enabled/disabled via the main circuit board. During nighttime hours,
enabled, the GL-235 will circulate warmer water from the pool
panels, thus cooling the pool over time.
If the water within the
collectors is cooler than the pool water
by 6 degrees or more,
and the pool is above the selected desired
temperature, the valve will
rotate allowing cooling via the collectors.
The heat dissipation will
stop when the collectors sensor output rises
within 3 degrees of
the pool temperature, or the pool temperature
is lowered below the set
• Setting Desired Temperature
The GL-235 logic is set by a single dial adjustment with the
desired pool/spa temperatures clearly indicated. The dial is
with the temperatures from 70 degrees to a high of 104
quick and easy, user-friendly operation.
temperature set indicates set pool/spa temperature, and the
automatically determine if the water should be solar heated
or cooled, thus
maximizing the system capabilities.
• Terminal Connections
input power, and sensor inputs; controls also have industry
standard 3 pin
connectors for both forward and reverse valve actuator
operation and screw
• LED Digital Indicators
the status of the system operation; four highly visible LED’s show:
1. Power to the control
output directing valves and/or pump to collect heat
3. Power output directing valves and/or pump to dissipate
4. Sensor fault indicator shows sensor(s) not
GL-235 Valve Electrical Output
Rating is the
industry standard 24VAC. A jumper switches the output to 12VAC for
compatibility with older valve actuators. Output is fuse
• Freeze Protection
[Field selectable operation]
Turns the GL-235 recirculation output
ON, directing warmer pool/spa water through the collectors when near
freezing temperatures are reached at the collector sensor.
GL-235 will allow recirculation when the collector temperature rises to 42
degrees. Two K Ohm sensors are required for operation.
One or more
freeze snap switches are recommended if freeze recirculation protection is
Note: see installation instructions before
using Recirculation Freeze
• System Test Switch
Allows the user to manually override the automatic function of the
GL-235 and verify operation.
The GL-235-LV/HV controls a single valve. In most applications this is the
solar valve, which diverts water through the solar collector panels or through
the normal pool loop depending on conditions.
• Units are shipped with the output voltage set to the
industry standard 24VAC.
• For older
systems with 12VAC valves, an internal jumper can be moved to select 12 VAX
• The GL-235 provides
two different types of connections to the pool/spa actuators. When used
with newer actuators manufacture red by Hayward, Compool, and Jandy
that come standard with wire end connectors, two 3-pin connectors are supplied.
For older actuators with no wire end connector, a 3 position terminal
block is supplied.
HELP » Contact Customer
• Toll-Free help line offering unit selection and sizing
• Online e-mail technical and installation support
solar pool heating systems - plus extends season
Maximizes your swimming pleasure!
• Efficiently manages solar pool
heating systems to operate at
efficiency - even under less than ideal weather conditions
Designed to provide hassle-free management of both residential
light-duty commercial pools
• Excellent for
high demand pools/spas at residential, condo, resort,
• hotel, motel, health club, vacation home, etc.
• Supplementing a solar pool heating system combined
• a Hayward GL-235 Solar Pool Controller -
together with a solar
cover greatly enhances total performance, plus reduces energy
• costs up to 70 percent - thereby saving
hundreds of dollars
• per year in pool heating
• Superior electronic control of pool/spa heating
• Reduces process to simple knob
• Highest unit life
expectancy; years of trouble-free service
• 75°F [24C] to 104°F [43C]
precision calibrated temperature control
• 120 / 240VAC input with 12 / 24VAC low voltage
• 1HP@120VAC / 2HP@240VAC high voltage output with
• contact SPDT output for
booster pump or time clock override
fault detection with LED indicator
Do-it-yourself friendly kit; average one to three hour installation
• Easy to read installation manual;
feasible by handy-person with standard hand tools
• Includes all necessary components needed for complete
• Brass material sensor for pool water
• Aluminum block sensor for
collector simulation that does not
• need to be mounted on the collectors]
GL-235 LV/HV upgraded model available for pump control
and/or valve plus pump
Proper kit selection supported by customer service agent
Installation supported by solar engineer tech assistance
Toll-Free help line and/or online e-mail tech support
GL-235 Hayward Series Technical
• 105-130VAC, .5A 50/60Hz. or 195-250VAC, .3A
Selectable low voltage 24VAC, 20VA, .85A or 12VAC, 20VA, 1.7A
• GL-235-LV/HV only:
SPST-NO isolated contact, 115VAC 1HP, 240VAC 2HP
• 2 required [thermistor, 10Kohm @
On at 4°F, off at 1.5°F
• On at <40°F, off at >
• 5-Year Limited Factory
Hayward Controllers carry a 5 year warranty
Hayward GL-235 Brochure
Hayward GL-235 Installation
Product Manufacturer: Hayward Industries, Inc.
Our Star Rating system is the direct result of experience
with well over 4000 actual units in the field in the homes of our
The criteria are:
• Quality of Materials and Workmanship
• Reliability and frequency of repairs
Factory response to service or warranty issues
Strength of the warranty
• Efficiency (verifiable
rating certification by industry accepted test
HELP » Contact Customer
• Toll-Free help line offering unit selection assistance
Online e-mail technical and installation support
Note: All product performance tests and claims are that of
manufacturer, not The Energy Supermarket.
Processing and Delivery Information: Please allow Processing
Time as stated above for your order, plus standard transportation delivery
time. Orders placed after 2PM EST may not begin processing until the next
business day. Please call for Rush Processing and/or Rush Shipping