The ETI SST-2 Freeze Protection Thermostat is designed to replace electromechanical thermostats and has the added benefit of a built-in Ground Fault Equipment Protection (GFEP). The thermostat energizes heaters at temperatures below 40F (4.4C) and turns the heaters off at temperature above 42F (5.5C).
Automatic freeze protection
40F (4.4C) set point
Automatic supply voltage selection (120V, 208V, 240V, or 277V)
Two-pole contactor switches up to 30 AMP heater loads
SPDT 1 amp Alarm relay with isolated contact
Integral 30 mA GFEP
Simple to install and operate
Minimum energy costs
Rugged NEMA4X enclosure for indoor and outdoor installations
The External Temperature Sensor (included with the thermostat) is required for the operation of the SST thermostat. The Temperature Sensor connects via wire nuts to the two blue wires in the SST enclosure. It does not matter which sensor wire is connected to which blue wire in the enclosure.
ETI SST-2 Freeze Protection Thermostat Installation Instructions
ETI SST-2 Freeze Protection Thermostat Data Sheet