Differential Temperature
Control
-
Fast, easy installation -
reduces labor
-
Diagnostic LEDs give instant system
operation feedback
-
Quick plug-in system monitoring
capability via TD-GL
-
Lightning and static electricity
protected
-
Proven reliability with outstanding
warranty coverage
-
Sensors can be located up to 1000
feet away
-
Precision electronic accuracy within
±1°F
-
Made in the USA!
LED Indicators
Three highly visible LEDs show;
-
power to
control
-
power
out from control,
-
power
out from control due to a recirculation mode to protect the system
from freeze damage.
GL-30 Output
The GL-30
output is rated at 20 Amps and is designed to directly operate a pump or
fan for heat collection when the controller is sensing an appropriate
temperature differential
Differential
The GL-30
has an adjustable differential with a range of 8º to 24ºF. Solar systems
with long pipe runs normally require a higher turn-on differential
temperature, and open loop systems with short pipe runs usually require
a lower turn-on differential temperature for optimum performance. The
GL-30 offers versatility to tailor controls to numerous specific systems
designs.
Storage
High Limit
The GL-30
allows you to set a high limit storage temperature from 110º to 230ºF.
Recirculation Freeze Protection
Recirculation freeze protection, when enabled, turns the GL-30 output on
to circulate warmer storage water through the collectors when near
freezing temperatures are reached at the collector sensor.
System
Test Switch
The system
test switch manually switches the GL-30 to ON, AUTO, or OFF for complete
control over the system at all times.
#C-20674
Ruud
Energy Miser Electric Water Heater
