Svarbi saugos informacija
ĮSPĖJIMAS: Before installing or using this thermostat, ensure the main power supply to the heating system is disconnected at the circuit breaker. Installation must be performed by a qualified electrician in accordance with local and national electrical codes. This thermostat is designed for high voltage systems. Failure to follow these instructions can result in electric shock, fire, or property damage.
This thermostat is intended for use with fan heaters and fan-forced units. Do not use it for any other purpose.
Produktas baigtasview
The Stelpro ST402PFF is a programmable electronic thermostat designed for accurate temperature control of fan heaters and fan-forced units. It offers programming capabilities to manage heating schedules and contributes to energy efficiency. The thermostat features a clear display and touch controls for user interaction.

1 pav.: priekis view of the Stelpro ST402PFF Thermostat.
Sąranka ir diegimas
Kontrolinis sąrašas prieš montavimą
- Ensure the main power supply to the heating system is OFF at the circuit breaker.
- Confirm the thermostat is compatible with your heating system's voltage (120V, 208V, or 240V) and wattage (iki 4000W).
- Verify that a junction box is available for mounting.
- Gather necessary tools: screwdriver, wire strippers, electrical tape, and wire nuts (included).
Termostato montavimas
The thermostat utilizes an S3 mounting plate for secure installation. Attach the mounting plate to the junction box using appropriate screws. Ensure the plate is firmly secured before proceeding with wiring.

2 pav.: S3 tvirtinimo plokštė saugiam montavimui.
Elektrinis sujungimas
This thermostat requires a three-wire electrical connection. Connect the thermostat wires to your heating system's wiring within the junction box using wire nuts. Refer to the diagram below for correct wiring. Ensure all connections are tight and secure.

Figure 3: Three-Wire Electrical Connection Diagram.
After wiring, carefully push the wires back into the junction box and attach the thermostat to the mounting plate. Restore power at the circuit breaker.
Naudojimo instrukcijos
Pagrindinė operacija
The thermostat features touch controls integrated into the faceplate. Use the left and right touch controls to decrease or increase the desired temperature setpoint. The digital display shows the current temperature and is backlit when in use for improved visibility.
Programming Modes (5/2 Day)
The ST402PFF thermostat offers 5/2 day programming capability, allowing you to set different heating schedules for weekdays and weekends. This includes specific setpoints for 'wake', 'leave', 'return', and 'sleep' periods to optimize comfort and energy usage.
Consult the full programming guide (if provided separately or online) for detailed steps on setting up your customized schedules.
Šilumos padidinimo režimas
Activate the heat boost mode for a rapid increase in room temperature. This feature provides quick warmth when needed, temporarily overriding the programmed schedule.
Temperatūros diapazonas
The adjustable temperature range for this thermostat is from 41°F (5°C) to 86°F (30°C).
Priežiūra
The Stelpro ST402PFF thermostat requires minimal maintenance. Periodically wipe the exterior with a soft, damp cloth to remove dust and dirt. Do not use abrasive cleaners or solvents. No internal user-serviceable parts are present.
Trikčių šalinimas
Thermostat Heats Up During Extended Operation
During extended periods of heating, the left side of the thermostat, where the high-power TRIAC is located, may become noticeably warm (surface temperature above 30°C). This is considered normal operation. This internal heating can temporarily affect the built-in temperature sensor, potentially causing the thermostat to cycle the heating load off prematurely and then restart it after a short interval as the TRIAC temperature decreases. The target temperature will still be reached, though the process may take slightly longer with brief pauses. This behavior is more apparent during long heating cycles, such as when recovering from significant temperature drops.
Bendrieji klausimai
- Nėra ekrano: Check the circuit breaker to ensure power is supplied to the heating system and thermostat.
- Neteisingas temperatūros rodmuo: Ensure the thermostat is not exposed to direct sunlight, drafts, or heat sources that could interfere with its sensor.
- Šildymas neįsijungia: Verify the setpoint is above the ambient temperature and that the programming schedule is active.
Specifikacijos
| Prekės ženklas | „Stelpro“ |
| Modelio pavadinimas | ST402PFF |
| Gaminio matmenys (A x P x G) | 4.94 colio x 4.94 colio x 1.38 colio (125.5 mm x 125.5 mm x 35 mm) |
| Spalva | Baltas |
| ttage Suderinamumas | 120 V, 208 V, 240 V |
| Maksimali galiatage | 4000 W (also supports 2000 W / 3475 W) |
| Temperatūros diapazonas | nuo 41 °F iki 86 °F (nuo 5 °C iki 30 °C) |
| Temperature Control Precision | ± 1 ° F (± 0.5 ° C) |
| Programavimas | 5/2 dienų programuojamas |
| Prekės svoris | 13.4 uncijos |
| UPC | 626296599075 |

Figure 4: Product Dimensions of the ST402PFF Thermostat.
Informacija apie garantiją
The Stelpro ST402PFF Programmable Electronic Thermostat is covered by a 5 metų garantija nuo įsigijimo datos. Ši garantija taikoma medžiagų ir gamybos defektams įprasto naudojimo sąlygomis. Išsaugokite pirkimo įrodymą, jei norėtumėte pateikti pretenzijas dėl garantijos.

Figure 5: Warranty and Key Features Overview.
Pagalba klientams
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Stelpro customer service. Visit the official Stelpro websvetainėje, kurioje rasite kontaktinę informaciją ir papildomus išteklius.
Stelpro Official Websvetainė: www.stelpro.com