by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
Supply Voltage The SST-2 fixed set point thermostat operates from 120, 208, 240 or 277 VAC at 50/60 Hz. For line supply and load connections, use 10 AWG or larger wires rated for at least 75°C (167°F) at 300 VAC. Contactor Rating The heater contactor provides two (2)...
by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
Ideally, the temperature sensor should be located on the pipe on the opposite side from the heater. If this is not possible the sensor can be used as an ambient temperature sensor although it will be less efficient. A representative diagram of a temperature sensor for...
by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
For the SST-2 the temperature set point is either 40 °F (4.44 °C) or 175 °F (79.44 °C) depending on the particular model being used. The set point is the temperature the unit uses for switching on and off with a 2 °F deadband. For the 40 °F (4.44 °C) model the unit...
by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
When wiring the SST-2 the white and red wires of the controller must be wired together for the unit to have power. This is regardless of the voltage applied to the unit. The white wire powers the controller and the red wire goes to the contact of the internal relay to...
by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
Yes, the length of the sensor wire can be shortened or extended as long as: Extending the sensor wire – The sensor wire can be extended up to 500 feet with #18 awg wire and 2000 feet with #12 awg wire. Click here to see more about sensor placement. Shortening...
by ETI Staff | Jul 26, 2017 | SST-2 Heat Trace FAQs
This depends on what you are calling heater cable. Most heat cable has two segments the heat tape and the cold wire. These are usually spliced together in either a high-temperature box or as an in line splice. The heat tape is the portion that actually gets hot and...