questions

SNOPRO-100 control

Does the SNOPRO-100 require a high-limit sensor?

The function of the high-limit sensor to monitor the slab temperature and protect the system against thermal runaway. Therefore, “YES”, both versions of the SNOPRO-100 require the high-limit sensors to be wired  to terminals 10 & 11 in the controller, either by the high-limit sensor that is included in both SNOPRO-100 or by putting in a 470k resistor as outlined on page 11 of our manual. The high-limit sensor should be installed regardless of whether the SNOPRO-100 is used at a satellite or a stand-alone to protect against thermal runaway.

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How to Resolve the ER2 Message on the Terra Smart WiFi Thermostat?

When the thermostat reads “ER2,” the floor sensor has a short circuit or has a loose connection. Your electrician must secure connections and test the probe using a multimeter set to the lowest possible ohms scale. The resistance reading should be between 7 and 17 ohms.  If a short is found and a backup sensor probe was not installed, you can bypass the error message by setting the thermostat to read the air temperature instead.

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