User’s guide STE402NP+ TÈME QUAL ITÉ SYS EG IÉ - R ISTERE D TIF Q ER STEM Y SY LIT UA C SINGLE programming Electronic thermostat Energy Verified For further information or to consult this guide online, please visit our website at www.stelpro.
WARNING Before installing and operating this product, the owner and/or installer must read, understand and follow these instructions and keep them handy for future reference. If these instructions are not followed, the warranty will be considered null and void and the manufacturer deems no further responsibility for this product. Moreover, the following instructions must be adhered to in order to avoid personal injuries or property damages, serious injuries and potentially fatal electric shocks.
Description The electronic thermostat STE402NP with or without backlight (indicated by a + at the end of the code) can be used to control electric heating units such as electric baseboards, convectors, or aeroconvectors. It keeps the temperature of a room at the requested set point with a high degree of accuracy. This product is designed for installations with electrical current - with a resistive load - ranging from 1.25 A to 16,7 A (120/240 VAC). It possesses a user-friendly interface.
Thermostat mounting and connection 1. Cut off power supply on lead wires at the electrical panel in order to avoid any risk of electric shock. 2. E nsure that the air vents of the thermostat are clean and clear of any obstruction. 3. Using a screwdriver, loosen the screw retaining the mounting base of the thermostat until you feel a loose (do not completely remove the screw). Then, remove the mounting base at the back of the thermostat by tilting it downward, then towards you. 4.
. P ass the wires from the wall through the hole at the base of the mounting base and connect them using the supplied solderless connectors. When making the connection with aluminum wire, make sure that you are using connectors identified CO/ALR. Please note that the thermostat wires do not have polarity. Therefore, the way they are connected is not important.
. Place all the wires into the connection box. 7. Align the little slots located on the top of the thermostat with those on the the mounting base and secure the thermostat to the mounting base. Note that you can also position the thermostat on the left or the right side of the junction box (see the illustrations below). Then, tighten the screw at the bottom of the unit. Alignment 8. Turn on the power. 9. S et the thermostat to the desired setting (see the following section).
OPERATION Ambient temperature/ timer Heating power indicator Pictograms Frost-free warning Day mode Night mode Fan mode Single programming mode Security mode Top button Bottom button Intial start up When powering on for the first time, the thermostat is initially set to Day mode displayed in Celsius and is set at 21 degrees by default. 7 .
Temperature set points The figures displayed above the pictogram indicate the temperature set point. It can be displayed in degrees Celsius or Fahrenheit (see “Display in degrees Celsius/Fahrenheit”). To adjust the set point, just press down the top button to increase the value, or the bottom button to decrease it. Set points can be adjusted by increments of 0.5°C (1°F). To quickly scroll through the set point values, press and hold down the button.
Night mode timer adjustment procedure 1. I f necessary, adjust the Day/Night mode set points at the desired temperatures. If needed, switch from one mode to the other by simultaneously pressing down the two buttons and releasing them immediately. 2. F rom the Night mode, simultaneously press down the two buttons for more than 3 seconds until the Moon icon blinks. 3. I f needed, adjust the timer by pressing down the top button to increase the value, or the bottom button to decrease it.
Adjustment procedure of the Single programming mode: 1. I f necessary, adjust the Day/Night set point at the desired temperatures. If needed, switch from one mode to the other by simultaneously pressing down the two buttons and releasing them immediately. 2. F rom the Night mode, simultaneously press down the two buttons for more than 3 seconds. If needed, adjust the timer by pressing down the top button to increase the value, or the bottom button to decrease it.
3. When the adjustment is completed, release the buttons and wait for 5 seconds to exit the adjustment function. Heating Power Indicator The level of power used to maintain the temperature at the set point is expressed as a percentage indicated by the number of bars in the thermometer displayed.
Procedures to deactivate the Security mode 1. To deactivate the Security mode, start by cutting off the thermostat power at circuit breaker and wait at least 20 seconds. 2. Turn the thermostat power back on and the icon will blink for a maximum of 5 minutes. 3. Simultaneously press down both buttons for 13 seconds (note that the backlight will blink after 3 seconds and the °C or °F symbol will appear after 8 seconds, but continue to keep both buttons pressed down).
Parameters saving and power failures The thermostat saves some parameters in a non-volatile memory to be able to recover them after being shut off (a power failure, for example).
TROUBLESHOOTING Problem The thermostat is hot. Heating is always on. Heating does not run even if the thermostat indicates it is on. The display does not turn on. The display turns off a few minutes and then turns on again. The display has low contrast when heating is on. The displayed ambient temperature is incorrect. The display indicates E1 or E2. Weak luminosity of the display.
Technical Specifications Supply voltage: 120/208/240 VAC, 50/60 Hz Minimum electrical current with a resistive load: 1.25 A 150 W @ 120 V 260 W @ 208 V 300 W @ 240 V Maximum electrical current with a resistive load: 16.7 A 2000 W @ 120 VAC 3470 W @ 208 VAC 4000 W @ 240 VAC Temperature display range: 3°C to 40°C (37°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.
li m i t ed w a r r a n t y li m i t ed w a r r a n t y li m i t ed w a r r a n t y Limited Warranty This unit has a 3-year warranty. If at any time during this period the unit becomes defective, it must be returned to its place of purchase with the invoice copy, or simply contact our customer service department (with an invoice copy in hand). In order for the warranty to be valid, the unit must have been installed and used according to instructions.
