STELPRO ST252NPFF Non-Programmable Electronic Thermostat for Fan Heaters Owner’s Manual

1

OWNER’S MANUAL  

INSTALLATION  

INSTALLATION – CONT’D  

INITIAL SETTINGS  

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

thermostat’s settings. Press  

and to confirm.  

or  

to change your selection  

ATTACH THE MOUNTING PLATE  

ATTACH THE THERMOSTAT  

1

3

1. Temperature format: °C / °F (Celsius / Fahrenheit)  

2. 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.  

NON-PROGRAMMABLE ELECTRONIC THERMOSTAT  

FOR FAN HEATERS  

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 thermostat and mounting plate.  

WARNING  

Turn off the power supply.  

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 one mode to  

ST252NPFF  

ST402NPFF  

2. Rotate the thermostat upwards [B] and attach it on the top  

hook of the mounting plate.  

1-844-STELPRO  

WWW.STELPRO.COM  

3. Tighten the screw at the top of the thermostat [C] to hold  

it in place securely.  

1. Loosen the screw [A] at the top of the thermostat [B]  

without removing it.  

another by simply pressing  

. ECO mode saves you  

money by providing a more energy-efficient setpoint  

temperature when you’re sleeping or away from home.  

4. Restore the power at the circuit breaker.  

2. Separate the mounting plate [C] from the thermostat.  

Pull the top of the plate and rotate it as shown.  

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

run them through the large opening in the center of the  

mounting plate [F].  

IMPORTANT INSTRUCTIONS  

3. Lobby mode: Std / Lby (Standard room / Lobby).  

THE THERMOSTAT MUST BE INSTALLED BY A CERTIFIED  

ELECTRICIAN.  

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  

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

the thermostat mounting plate to the junction box [E]. The  

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

left or right.  

B

C

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

comply with load limits.  

activated, the  

icon flashes.  

WARNING – HIGH VOLTAGE  

D

A

YOUR THERMOSTAT IS NOW READY TO USE!  

A

Turn off the power supply before installation and main-  

tenance. Leave at least 12 in. (30 cm) clearance around  

the thermostat to ensure that it is properly vented.  

C

B

F

FEATURES  

SAVE THESE INSTRUCTIONS  

G

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.  

KEY FEATURES  

TECHNICAL SPECIFICATIONS  

1. Press  

or once to lower or raise the setpoint  

temperature by 0.5°C / 1°F. The setpoint temperature  

E

will remain at this value until it is changed. Note: If you  

change the setpoint temperature while in ECO mode, the  

thermostat will switch to COMFORT mode.  

VOLTAGE AND LOAD  

PRODUCT CODE  

SUPPLY VOLTAGE  

LOAD AT 120 V  

LOAD AT 240 V  

VOLTS  

WATTS  

WATTS  

INTERFACE  

2. Press  

mode and vice versa.  

once to switch from ECO mode to COMFORT  

ST252NPFF  

ST402NPFF  

150-1250  

150-2000  

300-2500  

300-4000  

CONNECT THE POWER  

SUPPLY WIRES  

120-240  

2

3. Press and simultaneously to activate BOOST mode  

. Then, press or to select BOOST mode duration  

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

then heat at 100% for the time specified.  

This is a non-programmable thermostat. The temperature  

setpoint remains constant unless you change it.  

Load control type  

Frequency  

Resistive  

60 Hz  

Storage temperature  

-40°C to 50°C (-40°F to 122°F)  

-20°C to 50°C (-4°F to 122°F).  

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

1. Complete the thermostat’s electrical connection according  

to the diagram below. Tighten the wires securely in the  

supplied wire connectors.  

Operating temperature  

ADVANCED MENU ACCESS AND USE  

Heating output  

Humidity  

5% to 98% without condensation  

1. Press and hold  

thermostat’s advanced menus.  

for three (3) seconds to access the  

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

Action  

Type 1.Y  

Pollution degree  

Software  

2

Fan mode  

(LOBBY mode is  

activated when  

Keypad  

locked  

2. Press  

or to change your selection.  

Class A  

Rated impulse voltage  

Category II overvoltage (1500 V)  

BLACK  

POWER  

LOAD  

3. Press  

next menu.  

to confirm your selection and proceed to the  

flashing)  

Independently mounted control for surface mounting  

Thermistor used as a sensor, carries no load current  

Ambient  

temperature/  

contextual  

4. Press and hold  

advanced menus.  

for three (3) seconds to exit the  

Overload protection device external to the control: circuit breaker  

(refer to local electrical code)  

information  

Menu  

indicator  

ADVANCED MENUS LIST  

Current  

menu*  

ECO mode  

indicator  

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

Fahrenheit)  

°STELPRO LIMITED WARRANTY  

• Menu 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.  

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

Keypad  

RED  

YELLOW  

• Menu 30 – Lobby mode: Std / Lby (Standard room / Lobby)  

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

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

The diagram shows a 240 V power supply.  

BEFORE YOU GET STARTED  

• 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.  

WARNING  

Incorrectly connected electrical  

*Displays only when using the advanced menus.  

wires could result in a fire hazard.  

• To install this thermostat, you will need a #2 Phillips screw-  

driver.  

Touch the keypad once to activate the backlight, then you  

can make changes.  

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

connectors instead (not supplied).  

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

an inside wall facing the heating system.  

Saint-Bruno-de-Montarville, Quebec,  

Canada, J3V 6L7  

STELPRO DESIGN INC.  

EN1  

EN2  

EN3  

EN4  

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General	Details
Name	STELPRO ST252NPFF Non-Programmable Electronic Thermostat for Fan Heaters Owner’s Manual
Make	StelPro
Language	English
Filetype	PDF (Download)
File size	0.25 MB

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

Summary of Contents

• Page 1: owner’s manual installation initial settings To begin with, follow the on-screen instructions to adjust your thermostat’s settings. 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. The thermostat must be installed by a certified electrician. In Lobby mode, the thermostat automatically provides 100% heating for five minutes as soon as a sudden drop in temperature is detected. This is a non-programmable thermostat. The temperature setpoint remains constant unless you change it. Complete the thermostat’s electrical connection according to the diagram below. Limited three-year warranty. See details on the manufacturer's website. Incorrectly connected electrical wires could result in a fire hazard.