Why does my Stelpro STE402NP display have low contrast when heating is on?
If the display of your Stelpro Thermostat has low contrast when heating is on, the load is lower than the minimum load. To resolve this, install a heating unit that is within the load limits specified for the thermostat.
Why does my Stelpro Thermostat have weak luminosity of the display?
If your Stelpro Thermostat display shows weak luminosity, it could be due to a bad contact. Check the thermostat wirings, referring to the installation section for guidance.
Power| supply voltage | 120/208/240 VAC |
|---|---|
| minimum electrical current with a resistive load | 1.2 A |
| maximum electrical current with a resistive load | 16.7 A |
Electrical Power| minimum power at 240 VAC | 300 W |
|---|---|
| minimum power at 208 VAC | 260 W |
| minimum power at 120 VAC | 150 W |
| maximum power at 240 VAC | 4000 W |
| maximum power at 208 VAC | 3475 W |
| maximum power at 120 VAC | 2000 W |
Temperature Specifications| temperature display range | 0°C to 40°C (32°F to 99.5°F) |
|---|---|
| temperature display resolution | 0.5°C (0.5°F) |
| temperature set point range | 3°C to 30°C (37°F to 86°F) |
| temperature set point increments | 0.5°C (1°F) |
| storage temperature | -20°C to 50°C (-4°F to 120°F) |
Lists incompatible heating systems and load types for the thermostat.
Lists the components included in the thermostat package.
Provides guidelines for choosing an appropriate mounting location for the thermostat.
Details the steps and safety precautions for mounting and wiring the thermostat.
Illustrates the wiring diagram for a two-wire thermostat installation.
Illustrates the wiring diagram for a four-wire thermostat installation.
Lists and describes the available operating modes: Frost free, Day, Night, Fan, and Automatic.
Explains the function of display indicators like ambient temperature, timer, and set point.
Identifies the buttons for adjusting set points, timers, and locking the set point.
Details how ambient temperature is displayed and measured by the thermostat.
Explains how to adjust and the range of the temperature set point.
Describes the dual Day and Night modes with independent set points and manual switching.
Explains the timer function in Night mode for temporary temperature settings.
Step-by-step guide to adjusting the Night mode timer duration.
Explains the Automatic mode for alternating Day/Night cycles over 24 hours.
Procedure for activating, deactivating, and setting the Automatic mode timer.
Explains the frost-free function and the meaning of the snowflake icon.
Details how to switch and display temperature in Celsius or Fahrenheit.
Explains the importance and activation of Fan mode for heating systems with fans.
Step-by-step guide to activating or deactivating the Fan mode.
Lists electrical ratings, temperature ranges, resolution, and certifications.
Details the 3-year warranty terms, conditions, and limitations.
Provides contact details including address, email, and website.
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