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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 qualified electrician, according to the electric and building codes effective in your region. 

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Do NOT connect this product to a supply source other than 120 VAC or 240 VAC, and do not exceed the load limits 
specified. 

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Protect the heating system with the appropriate circuit breaker or fuse. You must regularly clean dirt accumulations on the 
thermostat. 

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Do NOT use fluid to clean thermostat air vents. 

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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. 

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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

Summary of Contents for Maestro ASMT402

Page 1: ...1 1 USER GUIDE SMART THERMOSTAT Model ASMT402 INS SMT402 US 040618...

Page 2: ...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 temperatu...

Page 3: ...ANT 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...

Page 4: ...he heating system with the appropriate circuit breaker or fuse You must regularly clean dirt accumulations on the thermostat Do NOT use fluid to clean thermostat air vents Do NOT install thermostat in...

Page 5: ...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 expos...

Page 6: ...e 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...

Page 7: ...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 Ge...

Page 8: ...e 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 th...

Page 9: ...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 inst...

Page 10: ...ermostat 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 th...

Page 11: ...on If it doesn t read the Thermostat troubleshooting section on page 22 At first power up the thermostat will ask you to set up the basic options If it is not the first power up the thermostat display...

Page 12: ...ING MODE 7 SET 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...

Page 13: ...ION TOGGLE BETWEEN RELATIVE AMBIENT HUMIDITY AND OUTDOOR TEMPERA TURE ACCESS TO AD VANCED MENUS CONFIRM IN ADVANCED MENUS As soon as your thermostat is installed set the heating mode if you want to co...

Page 14: ...irm the selection The selected value will flash 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 thr...

Page 15: ...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...

Page 16: ...AT 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 con...

Page 17: ...splayed 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 confirm the selection The icon will blink r...

Page 18: ...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 t...

Page 19: ...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 confirm the selection Tip If you change the display unit directly o...

Page 20: ...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...

Page 21: ...e temperature of your home according to your geographic location to ensure ideal com fort when you arrive and lowering it when you leave TRACK YOUR ENERGY CONSUMPTION By giving you access to real time...

Page 22: ...O message will disappear when the temperature reaches 32 F HI The room temperature exceeds 122 F Heating will remain inactive The HI message will disappear when the temperature reaches 122 F The therm...

Page 23: ...turns on and off frequently In the heating mode menu 3 select ON The connection icon on the home screen is flashing There s a problem with the Zigbee radio module Reset the thermostat and reconnect i...

Page 24: ...dditional display Ambient humidity Zigbee connection Disconnected Temperature format Degrees Fahrenheit Heat mode Baseboard Locking Keyboard unlocked Open window detection Activated Proximity sensor A...

Page 25: ...240 VAC 50 60 Hz TEMPERATURE DISPLAY Actual measured temperature 32 F to 122 F Temperature display increments 1 F Temperature setpoint 41 F to 86 F Temperature setpoint increments 1 F CONNECTIVITY Zig...

Page 26: ...for the warranty to be valid the unit must have been installed and used according to instructions If the installer or the user modifies the unit he she will be held responsible for any damage resultin...

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