Stelpro Maestro ASMT402 User manual

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USER GUIDE
SMART THERMOSTAT
Model: ASMT402
INS-SMT402-US-040618

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TABLE OF CONTENTS
COMPATIBILITY 3
WHAT’S IN THE BOX AND TOOLS REQUIRED 3
WARNING 4
Where to install your MAESTRO controller
•thermostat 5
Read this guide and watch the installation video 5
INSTALLING THE MAESTRO THERMOSTAT 6
1Cut off power supply 6
2Remove existing thermostat 7
3Secure the MAESTRO thermostat mounting plate 8
4Connect the wires 9
5Secure the thermostat on the mounting plate 10
6Turn power back on 11
7 Set-up basic options on rst start 12
USING THE THERMOSTAT 13
Thermostat interface 13
Navigating the advanced menus 14
Advanced menus 14
Navigating the °STELPRO menu 15
Setting the heating mode 15
Connecting a thermostat to the MAESTRO controller
•thermostat 16
With the MAESTRO app 16
Without the MAESTRO app 17
Connecting the thermostat to another Zigbee network 18
Setting the temperature setpoint 18
Displaying ambient relative humidity or outdoor temperature 19
Choosing the temperature display unit (°C or °F) 19
Locking or unlocking the keypad 19
Activating or deactivating open window detection 20
Activating or deactivated proximity detection 20
Resetting the thermostat 20
THE 360° COMFORT EXPERIENCE 21
Make the most of your MAESTRO 21
Control your comfort from wherever you are 21
Group rooms 21
Create personalized activities 21
Anticipated start 21
Geofencing: comfort follows you wherever you go 21
Track your energy consumption 21
THERMOSTAT TROUBLESHOOTING 22
Common problems 22
THERMOSTAT DEFAULT VALUES 24
TECHNICAL SPECIFICATIONS 25
Electrical data 25
Temperature display 25
Connectivity 25
Storage and operating conditions 25
WARRANTY 26

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• MAESTRO thermostat
• Mounting plate
• Mounting screws (2)
• Caps (2)
• Quickstart guide
• Warning
WHAT’S IN THE BOX AND TOOLS REQUIRED
COMPATIBILITY
Your MAESTRO controller • thermostat can control electric baseboards, convectors and fan-forced heaters.
IMPORTANT: This thermostat is not compatible with:
• Systems with inductive loads
• Central heating systems
• Systems with resistive loads that are:
o inferior to 150 W at 120 VAC / 260 W at 208 VAC / 300 W at 240 VAC
o superior to 2000 W at 120 VAC / 3400 W at 208 VAC / 4000 W at 240 VAC
See page 25 for detailed technical specications of the MAESTRO thermostat.
To install your thermostat, you will need:
• No. 2 Phillips screwdriver
The two required screws are supplied.

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Before installing and operating this thermostat, 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. All electric
connections must be made by a qualied electrician, according to the electric and building codes effective in your region.
• Do NOT connect this product to a supply source other than 120 VAC or 240 VAC, and do not exceed the load limits
specied.
• Protect the heating system with the appropriate circuit breaker or fuse. You must regularly clean dirt accumulations on the
thermostat.
• Do NOT use uid to clean thermostat air vents.
• Do NOT install thermostat in a wet place or on an external wall. However, installing it in isolated walls is allowed. To avoid
any risk of overheating, leave a clearance of at least 30 cm (12 in.) around the thermostat to ensure proper ventilation.
• Also, make sure that the air vents at the bottom and top of the thermostat housing are clear of any obstruction: blocked
air vents can lead to the unit overheating and affect its operation.
NOTE: °STELPRO reserves the right to modify its product without notice to improve operability. Therefore, the instructions in
this user guide many not entirely match all the functions of your thermostat. To obtain the most recent documentation, visit
the °STELPRO website.
IMPORTANT: HIGH VOLTAGE! CUT OFF POWER BEFORE INSTALLING UNIT OR DOING ANY MAINTENANCE.
WARNING

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WHERE TO INSTALL YOUR MAESTRO CONTROLLER•THERMOSTAT
Install a MAESTRO thermostat in each room where you want to control the temperature.
You must install the thermostat at approximately 5 ft. from the oor, on an indoor
wall that faces the heating system. The thermostat must be mounted on an electri-
cal box.
ATTENTION : To avoid any risk of overheating, leave a clearance of at least 12 in.
around the thermostat to ensure proper ventilation. Also, the front of the unit
should be completely clear of any obstruction to ensure optimal functionality. For
example, do not install the thermostat behind curtains or furniture.
To avoid getting false temperature measurements, do not install the thermostat in
any of the following locations:
• Near a window or close to a door leading outside
• In an area exposed directly to the light or heat of the sun, a lamp, a replace or any other heat source
• Near an air outlet
• Near concealed ducts or a chimney
• Where there is poor air ow (e.g. behind a door)
• Where there is a high concentration of dust
• Where there are frequent air drafts (e.g. top of stairs)
READ THIS GUIDE AND WATCH THE INSTALLATION VIDEO
Before you start, take a few minutes to carefully read this guide and watch the step-by-step video on installing the MAESTRO
thermostat. It will ensure safe and easy installation.
The installation video is at the bottom of this page: www.stelpro.com/en-US/maestro

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1CUT OFF POWER SUPPLY
To avoid any risk of electric shock, cut off the power supply on the lead wires from the electrical panel. Make sure the
power is off by checking, for example, that the heating system remains off even if the setpoint temperature is higher
than the ambient temperature (mechanical thermostat).
INSTALLING THE MAESTRO THERMOSTAT
INSTALLATION OF THE THERMOSTAT MUST BE DONE BY A QUALIFIED ELECTRICIAN.
IMPORTANT

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2REMOVE EXISTING THERMOSTAT
If an existing thermostat is being replaced, remove it and disconnect its wires from the heating system and power
supply.
NOTE: These instructions apply to a thermostat with a °STELPRO mounting plate.
1 - Loosen the screw at the base of the thermostat, without completely removing it, to separate the thermostat from the
mounting plate.
2 - Gently pull the thermostat to gain access to the wires.
3 - Disconnect the thermostat wires from those of the heating sys-
tem and power supply.
4 - Remove the mounting plate.

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3SECURE THE MAESTRO THERMOSTAT MOUNTING PLATE
Secure the MAESTRO thermostat mounting plate to the electrical box using the screws supplied.
1 - Loosen the screw at the base of the MAESTRO thermostat, without completely removing it, until the thermostat and the
mounting plate are no longer holding together.
2 - Slide the mounting plate downward and then pull on it to separate it from the thermostat.
3 - Using the mounting screws supplied (2), secure the MAESTRO thermostat mounting plate to the electrical box. Ensure
the plate is perfectly straight so that the thermostat is also straight.
4 - Pass the power supply wires through the large opening at the centre of the mounting plate.
NOTE: You can position the mounting plate
either to the left, in the centre or to the right
of the electrical box, according to your needs.
(See image below).

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4CONNECT THE WIRES
Using the caps supplied (2), connect the wires of the MAESTRO thermostat to those of the heating system and
power supply according to the corresponding connection diagram (2 or 4 wires). Tighten the caps onto the wires to
ensure the connection is secure. Then place all the wires inside the electrical box.
NOTE: If the electrical wires are aluminum, use
CO/ALR connectors instead (not supplied).
NOTE: Since thermostat wires do not have polarity,
the way they are connected is not important.
2-Wire intallation
4-Wire installation
IMPROPER WIRING IS
A FIRE HAZARD.
IMPORTANT

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5SECURE THE THERMOSTAT ON THE MOUNTING PLATE
Align and secure the thermostat on the mounting plate.
1 - Ensure the air vents in the thermostat are clean and clear of any obstruction.
2 - Align the slot on the top of the thermostat with the slot on the mounting plate.
3 - Then secure the thermostat to the mounting plate making sure that the wires do not get pinched between the unit
and the mounting plate.
4 - Tighten the screw at the base of the thermostat to secure it in place.

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6TURN POWER BACK ON
Restore power to the heating system and thermostat. Then ensure the thermostat turns on.
If the thermostat does not turn on, touch any one of its buttons. The thermostat should turn on. If it doesn’t, read the
Thermostat troubleshooting section on page 22.
At rst power up, the thermostat will ask you to set-up the basic options. If it is not the rst power up, the thermostat
displays the ambient temperature as well as the percentage of relative ambient humidity. If the temperature is below
32°F, the home screen will display LO. If the temperature exceeds 122°F, the screen will display HI.

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TEMPERATURE FORMAT
HEATING MODE
7SET-UP BASIC OPTIONS ON FIRST START
2 settings to be set:
> Temperature format (°Celsius / °Fahrenheit)
> HEATING MODE (Baseboard / Fan-forced heater)
Use the LEFT/RIGHT arrows to change the selection and used CENTER button to conrm.

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1
2
3
4
5
6
7
8
9
10
11
ZIGBEE CONNECTED
HEATING MODE
HEATING POWER
OVERHEATING APPLIANCE
KEYBOARD LOCKED
ROOM TEMPERATURE
RELATIVE AMBIENT HUMIDITY/
OUTDOOR TEMPERATURE
SETPOINT IS LOW OR OPEN WINDOW DETECTED
(BLINKING ICON)
ADVANCED MENUS INDICATOR
ADJUST THE ROOM TEMPERATURE / MODIFY THE
MENU SELECTION
TOGGLE BETWEEN RELATIVE AMBIENT HUMIDITY
AND OUTDOOR TEMPERATURE / ACCESS TO AD-
VANCED MENUS / CONFIRM IN ADVANCED MENUS
As soon as your thermostat is installed, set the heating mode. if you want to connect your thermostat to a MAESTRO control-
ler
•thermostat, you must also set up the Zigbee connection. Install all your thermostats before connecting them to the
controller
•thermostat.
THERMOSTAT INTERFACE
MAESTRO three-button interface makes 360° comfort possible.
USING THE THERMOSTAT
6
7
8
12 3 4 5
11
10
9

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NAVIGATING THE ADVANCED MENUS
To access the advanced menus and their options:
1 - Touch the button for three seconds to access the advanced menus. The rst menu you’ll access is the Zigbee connection
menu.
2 - Touch the button again to access the next menu. The current value will ash, indicating that it can be modied.
3 - Use the and buttons to select another option for the displayed menu.
4 - After selecting an option, touch the button to conrm the selection. The selected value will ash rapidly for two seconds,
then appear continuously once it is saved. Then, the thermostat automatically switches to the next menu.
5 - Touch the button for three seconds to exist the advanced menus and return to the thermostat’s home screen.
NOTE: After 30 seconds of inactivity, the selected option is automatically saved (except for menu 1 – Zigbee connection)
and the thermostat returns to the home screen.
Advanced menus
• Menu 1: Zigbee connection ( )
• Menu 2: Temperature display (°C or °F)
• Menu 3: Heating mode ( )
• Menu 4: Locking/Unlocking the keypad ( )
• Menu 5: Open window detection ( )
• Menu 6: Proximity detection
• Reset Menu (DEF)

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NAVIGATING THE °STELPRO MENU
To access the °STELPRO menu touch the button on the home screen for ten seconds.
NOTE: After three seconds, the advanced menus will display (menu 1). Continue touching the button until the °STELPRO
menu appears.
The °STELPRO menu’s sub-menus provide information about the thermostat.
• t1: Thermostat version (e.g., if the thermostat displays 14, you have version 1.4 of the thermostat)
• t2: Zigbee radio version (e.g., if the thermostat displays 10, you have version 1.0 of the radio)
• t3: Date manufactured
• t4: Month manufactured
• t5: Year manufactured
• t6: Control code in baseboard mode (information reserved for °STELPRO)
• t7: Control code in fan mode (information reserved for °STELPRO)
To navigate the °STELPRO menu:
• Use the button to switch from one item to the next.
• Touch the button for three seconds to exit the °STELPRO menu and return to the thermostat’s home screen
SETTING THE HEATING MODE
The heating mode corresponds to the type of heating system the thermostat controls: baseboard convector or fan convector.
Select the heating mode as soon as you nish installing the thermostat.
1 - Access menu 3.
2 - Use the and buttons to select the baseboard convector (OFF) or fan convector (ON) mode.
3 - Touch the button to conrm your selection.
When the fan convector mode is selected, the icon displays on the thermostat’s home screen.

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CONNECTING A THERMOSTAT TO THE CONTROLLER • THERMOSTAT
To create your MAESTRO account, you must connect your thermostats to the MAESTRO controller • thermostat using a Zigbee
network. Make sure to connect the thermostat closest to the MAESTRO controller thermostat rst and then each of the other
thermostats by gradually working outwards.
With the MAESTRO app
NOTE: To connect a thermostat to the MAESTRO controller•thermostat using the MAESTRO app, your controller • ther-
mostat must be linked to a Wi-Fi network (see www.stelpro.com/en-US/support-maestro). You may need a Zigbee repea-
ter to get around obstacles or to strengthen the Zigbee signal.
1 - In the MAESTRO app, access HOME SETTINGS, from the groups and settings
screen, and tap CONNECT A THERMOSTAT TO MY MAESTRO SYSTEM. The
screen ADD A NEW THERMOSTAT on the controller • thermostat will display
the Zigbee channel being used.
2 - On the thermostat, access menu 1 and select the channel displayed by the
controller • thermostat. You can also use the auto-connect option (ON), but the
connection may take more time.
3 - On the thermostat, tap the icon to conrm the selection. The icon will
blink rapidly while the thermostat searches for the channel. The Zigbee channel
will appear when the connection is established.
When the thermostat is connected to the controller• thermostat’s Zigbee network:
• The icon will appear on the thermostat home screen.
• A message conrming the connection will appear on the controller • thermos-
tat’s screen.
• The MAESTRO app will show that the thermostat has been successfully connected and the thermostat will appear in
the app. You can now replace the default name of each thermostat by a meaningful name that is easily recognizable
(e.g. bathroom).
If the thermostat does not detect a Zigbee network, an "Err" message will display on the thermostat.

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Without the MAESTRO app
The thermostat can be connected to the controller • thermostat even if the controller • thermostat is not linked to a Wi-Fi
network.
1 - On the controller • thermostat, access SETTINGS > ZIGBEE SETUP > ADD A NEW THERMOSTAT. The screen ADD A
NEW THERMOSTAT on the controller • thermostat will display the Zigbee channel being used.
2 - On the thermostat, access menu 1 and select the channel displayed by the controller • thermostat. You can also use the auto-
connect option (ON), but the connection may take more time.
3 - On the thermostat, tap the button to conrm the selection. The icon will blink rapidly while the thermostat searches
for the channel. The Zigbee channel will display them when the connection is established.
When the thermostat is connected to the controller• thermostat’s Zigbee network, the icon will appear on the home screen.
If the thermostat does not detect a Zigbee network, an "Err" message will appear on the thermostat.
Put new thermostat
in pairing mode
on channel : 15
ADD A NEW
THERMOSTAT

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CONNECTING THE THERMOSTAT TO ANOTHER ZIGBEE NETWORK
If you do not have a MAESTRO controller
•thermostat, but your home already has a Zigbee network, you can connect the
thermostat to this network. However, you won’t be able to use the MAESTRO app or benet from all the MAESTRO system
advantages.
1 - Set the thermostat control device to Zigbee connection mode.
2 - From the thermostat, access menu 1 and select the channel indicated by the control device. You can also use the automatic
connection (ON) option, but the connection will take longer. With the auto-connect option, the icon ashes quickly
while the thermostat searches for the channel. The Zigbee channel is displayed when the connection is established.
3 - Touch the button to conrm your selection.
Once the thermostat is connected to the Zigbee network, the icon will display on the home screen.
If the thermostat does not detect a Zigbee network, the "Err" message will display on the thermostat.
SETTING THE TEMPERATURE SETPOINT
By default, the temperature setpoint is set to 70°F. To change the temperature setpoint, use the and on the home
screen.
The button will increase the temperature setpoint by 1 °F at a time.
The button will lower the temperature setpoint by 1°F at a time.
If the thermostat must activate the heating system to reach the temperature setpoint, the icon indicates the intensity at
which the heating system is working.
NOTE: If the thermostat is part of a MAESTRO system that includes a controller
•thermostat, the temperature will adjust
automatically if the status of the home changes or if a thermostat-related activity begins.
NOTE : The thermostat keypad must be unlocked (i.e. icon not displayed on the screen).

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DISPLAYING AMBIENT RELATIVE HUMIDITY OR OUTDOOR TEMPERATURE
In addition to room temperature, the home screen displays the percentage of ambient relative humidity by default. On the
home screen, touch the button to switch the ambient humidity display to outdoor temperature.
NOTE : NOTE: Outdoor temperature display is possible only if your thermostat is connected to a MAESTRO controller •
thermostat linked by Wi-Fi to an internet connection and you have geofenced your home using the MAESTRO app.
CHOOSING THE TEMPERATURE DISPLAY UNIT (°C OR °F)
By default, the temperature is displayed in degrees Celsius. You can also display the temperature in degrees Fahrenheit.
1 - Access menu 2.
2 - Use the and buttons to select °C or °F.
3 - Touch the button to conrm the selection.
Tip: If you change the display unit directly on the controller
•thermostat, the change will be applied to all your other ther-
mostats automatically.
LOCKING OR UNLOCKING THE KEYPAD
You can lock the thermostat keypad to prevent the set temperature from being changed by mistake. By default, the thermos-
tat keypad is unlocked.
1 - Access menu 4.
2 - Use the and buttons to unlock (OFF) or lock (ON) the keypad.
3 - Touch the button to conrm your selection.
When the keypad is locked, the icon displays on the thermostat’s home screen.
NOTE: You can change a thermostat’s temperature setpoint with the controller
•thermostat or the MAESTRO app even
if the keypad is locked.

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ACTIVATING OR DEACTIVATING OPEN WINDOW DETECTION
By default, the thermostat will detect if a window is open in the room where it is located, and the thermostat automatically
adjusts the set temperature to 45°F to avoid heating the room unnecessarily.
1 - Access menu 5.
2 - Use the and buttons to activate (ON) or deactivate (OFF) open window detection.
3 - Touch the button to conrm the selection.
ACTIVATING OR DEACTIVATED PROXIMITY DETECTION
By default, the thermostat screen automatically turns on when it detects a presence nearby. You can deactivate this feature,
to prevent the thermostat from turning on every time you enter a child's room, for example. When this feature is deactivated,
simply touch one of the thermostat buttons to turn on the screen.
1 - Access menu 6.
2 - Use the and buttons to activate (ON) or deactivate (OFF) proximity detection.
3 - Touch the button to conrm the selection.
RESETTING THE THERMOSTAT
You can reset the thermostat to restore its default settings.
1 - Access the Reset menu (DEF).
2 - Use the and buttons to select "Y" and revert
to default values.
3 - Touch the button to conrm the reset.
The thermostat may take a few seconds to reset.
ALL PARAMETERS RETURN TO THEIR DEFAULT
VALUE AND THE CONNECTION TO THE ZIGBEE
NETWORK AND THE CONTROLLER
•THERMOSTAT
IS DELETED. THE CONTROLLER
•THERMOSTAT STILL
DISPLAYS THE THERMOSTAT, EVEN IF IT CAN NO
LONGER CHECK IT. THEREFORE, YOU MUST DELETE
THE CONTROLLER
•THERMOSTAT MANUALLY
(SEE THE MAESTRO CONTROLLER
•THERMOSTAT
INSTALLATION AND USER GUIDE).
IMPORTANT