STELPRO ST252NPFF Non-Programmable Electronic Thermostat Owner’s Manual

1

INITIAL SETTINGS  

OWNER’S  

MANUAL  

CONNECT THE POWER  

SUPPLY WIRES  

2

To begin with, follow the on-screen instructions to adjust your  

thermostat’s settings. Press  

to confirm.  

or  

to change your selection and  

WARNING: Incorrectly connected electrical wires could  

result in a fire hazard.  

NON-PROGRAMMABLE ELECTRONIC THERMOSTAT  

FOR BASEBOARDS, CONVECTORS AND FAN HEATERS  

• Temperature format: °C / °F (Celsius / Fahrenheit)  

• ECO mode setpoint temperature: (5°C to 30°C / 41°F to 86°F).  

By default, the ECO mode setpoint is 17°C / 63°F.  

1. Complete the thermostat’s electrical connection according to  

the diagram below. Tighten the wires securely in the supplied  

wire connectors.  

ST252NPFF ST402NPFF  

Your heating needs may vary according to the season and even  

the time of day. To meet your needs, this thermostat is equipped  

with two distinct modes: ECO and COMFORT. You can switch from  

2. Push the wires and connectors into the electrical box.  

one mode to another by simply pressing  

you money by providing a more energy-efficient setpoint tempera-  

ture when you’re sleeping or away from home.  

. ECO mode saves  

NOTE: If the electrical wires are aluminum, use CO/ALR connec-  

tors instead (not supplied).  

• Heating mode: (Baseboard / Fan heater)  

FOR BASEBOARDS, CONVECTORS AND FAN HEATERS  

• Lobby mode: STD / LBY (Standard room / Lobby).  

In LOBBY mode, the thermostat automatically provides 100%  

heating for five minutes as soon as a sudden drop in temperature  

is detected. This mode can be useful for heaters located near  

an entrance. When this mode is activated, the  

icon flashes.  

LOBBY mode is available only if the heating mode selected is  

“Fan heater.”  

E

1-844-STELPRO  

WWW.STELPRO.COM  

BLACK  

RED  

L1=Black  

LOAD  

POWER  

L2/N=Red  

LD=Yellow  

YELLOW  

The diagram shows a 240 V power supply.  

FEATURES  

FOR BASEBOARDS AND CONVECTORS ONLY  

IMPORTANT INSTRUCTIONS  

KEY FEATURES  

1. Press  

or once to lower or raise the setpoint temperature by  

THE THERMOSTAT MUST BE INSTALLED BY A CERTIFIED  

ELECTRICIAN.  

0.5°C / 1°F. The setpoint temperature will remain at this value  

until it is changed.  

Connect the thermostat to a 120 to 240 VAC power source ONLY and  

comply with load limits.  

NOTE: If you change the setpoint temperature while in ECO mode,  

the thermostat will switch to COMFORT mode.  

WARNING – HIGH VOLTAGE. Turn off the power supply before  

installation and maintenance. Leave at least 12 in. (30 cm)  

clearance around the thermostat to ensure that it is properly  

vented.  

BLACK  

2. Press  

once to switch from ECO mode to COMFORT mode  

RED  

and vice versa.  

L1=Black  

LOAD  

POWER  

YELLOW  

3. Press and  

simultaneously to activate BOOST mode  

or to select BOOST mode duration  

L2/N=Red  

. Then, press  

LD=Yellow  

The diagram shows a 240 V power supply.  

(10, 20, 30, 40, 40, 50 or 60 minutes). The thermostat will then  

heat at 100% for the time specified. When BOOST mode is on,  

the time remaining is displayed on the screen.  

SAVE THESE INSTRUCTIONS  

FOR BASEBOARDS AND CONVECTORS ONLY  

4. Press any button to discontinue BOOST mode.  

TECHNICAL SPECIFICATIONS  

VOLTAGE AND LOAD  

PRODUCT CODE  

SUPPLY VOLTAGE  

LOAD AT 120 V  

LOAD AT 240 V  

ADVANCED MENU ACCESS AND USE  

VOLTS  

WATTS  

WATTS  

ST252NPFF  

ST402NPFF  

150-1250  

150-2000  

300-2500  

300-4000  

1. Press and hold  

advanced menus.  

for 3 seconds to access the thermostat’s  

120-240  

BLACK  

2. Press  

or to change your selection.  

Load control type  

Frequency  

Resistive  

60 Hz  

RED  

LOAD  

3. Press  

menu.  

to confirm your selection and proceed to the next  

L1=Black  

Storage temperature  

-40°C to 50°C (-40°F to 122°F)  

L2/N=Red  

LD=Yellow  

YELLOW  

-20°C to 50°C (-4°F to 122°F).  

LC display less effective below 0°C (32°F)  

The diagram shows a 240 V power supply.  

Operating temperature  

4. Press and hold  

for 3 seconds to exit the advanced menus.  

Humidity  

5% to 98% without condensation  

ADVANCED MENUS LIST  

Action  

Type 1.Y  

• 10 – Temperature format: °C / °F (Celsius / Fahrenheit)  

Pollution degree  

Software  

2

Class A  

• 20 – ECO mode setpoint temperature (5°C to 30°C / 41°F to  

86°F). By default, the ECO mode setpoint is 17°C / 63°F.  

Rated impulse voltage  

Category II overvoltage (1500 V)  

ATTACH THE THERMOSTAT  

3

Independently mounted control for surface mounting  

Thermistor used as a sensor, carries no load current  

• 30 – Load type selection (Convector / Fan heater). FAN HEATER  

mode is the default mode.  

Overload protection device external to the control: circuit breaker (refer to local electrical code)  

• 31 – Lobby mode: STD / LBY (Standard room / Lobby). LOBBY  

mode is available only if the heating mode selected is  

FAN HEATER.  

1. Using the alignment guide,  

hook the bottom [A] of the  

thermostat into the bottom of  

the plate. Be sure not to jam  

the wires between the thermo-  

stat and mounting plate.  

BEFORE YOU GET STARTED  

• 40 – Keypad lock: ON / OFF (Lock keypad / Unlock keypad)  

• dEF – Reset thermostat to default values: N / Y (No / Yes)  

• The box contains one (1) thermostat with mounting plate, two (2)  

mounting screws, three (3) twist-on wire connectors and one (1)  

owner’s manual.  

2. Rotate the thermostat upwards  

and attach it on the top hook of  

the mounting plate.  

• To install this thermostat, you will need a #2 Phillips screwdriver.  

USING THE TECHNICAL MENUS:  

• Install your thermostat about 5 ft (1.5 m) from the floor on an  

inside wall facing the heating system.  

1. Press  

menus (the advanced menu will appear after 3 seconds but  

continue to hold for another 7 seconds).  

for 10 seconds to access the thermostat’s technical  

A

B

3. Tighten the screw at the top of the  

thermostat [B] to hold it in place  

securely.  

2. Use  

ou to change your selection.  

3. Press  

menu.  

to confirm your selection and continue to the next  

INSTALLATION  

4. Restore the power at the circuit  

breaker.  

4. Press  

menus.  

for 3 seconds to exit the thermostat’s technical  

TECHNICAL MENU LIST  

NOTE: If you need to remove the  

thermostat, follow step 1 in section  

1, then use a straight screwdriver  

to unhook it from the top of the  

mounting plate.  

ATTACH THE MOUNTING PLATE  

1

• t1: Maximum room temperature setpoint limit  

(5°C to 30°C / 41°F to 86°F). The default setting is 30°C.  

• t2: Minimum room temperature setpoint limit  

(5°C to 30°C / 41°F to 86°F). The default setting is 5°C.  

A

WARNING: Turn off the  

power supply.  

NOTE: The maximum setpoint limit must be higher than the mini-  

mum setpoint limit, and the minimum setpoint limit must be lower  

than the maximum setpoint limit.  

1. Loosen the screw [A] at the  

top of the thermostat without  

removing it.  

INTERFACE  

• t3: Year of production  

• t4: Month of production  

• t5: Identification number  

• t6: Software version  

2. Separate the mounting plate  

from the thermostat. Pull the  

top of the plate and rotate.  

This is a NON-PROGRAMMABLE thermostat. The temperature  

setpoint remains constant unless you change it.  

MOUNTING  

PLATE  

Touch the keypad once to activate the backlight, then you can  

make changes.  

• t7: Thermostat control code  

3. Take the power wires [B] out of the junction box and  

run them through the large opening in the center of the  

mounting plate [C].  

Heating output  

4. Using the two (2) mounting screws provided [D], attach the  

thermostat mounting plate to the junction box. The plate  

can be centered on the junction box or shifted to the left  

or right.  

Mode aéroconvection  

(Le mode VESTIBULE est  

en action s’il clignote)  

Keypad locked  

Ambient  

temperature/  

contextual  

B

information  

Menu indicator  

Current menu*  

ECO mode  

indicator  

D

C

Keypad  

JUNCTION BOX  

STELPRO LIMITED WARRANTY  

D

MOUNTING PLATE  

Limited three-year warranty. See details on www.stelpro.com.  

*Displays only when using the advanced menus.  

STELPRO DESIGN INC. Saint-Bruno-de-Montarville, Québec, Canada, J3V 6L7  

VIEW FULL SCREEN PDF MANUAL

General	Details
Name	STELPRO ST252NPFF Non-Programmable Electronic Thermostat Owner’s Manual
Make	StelPro
Language	English
Filetype	PDF (Download)
File size	0.4 MB

Download PDF

(1 votes, average: 5.00 out of 5)

Loading...

• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• StelPro

STELPRO ST252NPFF Non-Programmable Electronic Thermostat Owner’s Manual Overview

Summary of Contents

• Page 1: INITIAL SETTINGS To begin with, follow the on-screen instructions to adjust your thermostat’s settings. Warning: Incorrectly connected electrical wires could result in a fire hazard. Non-programmable electronic thermostat for baseboards, convectors, and fan heaters. Temperature format: °C / °F (Celsius / Fahrenheit). ECO mode setpoint temperature: (5°C to 30°C / 41°F to 86°F). By default, the ECO mode setpoint is 17°C / 63°F. Lobby mode: STD / LBY (Standard room / Lobby). In LOBBY mode, the thermostat automatically provides 100% heating for five minutes as soon as a sudden drop in temperature is detected. The thermostat must be installed by a certified electrician. Warning – High voltage. Turn off the power supply before installation and maintenance. This is a non-programmable thermostat. The temperature setpoint remains constant unless you change it.