STELPRO STZW402+ ELECTRONIC THERMOSTAT Owner’s Manual

: October 30, 2023
: StelPro

Table of Contents

Stelpro STZW402+ ELECTRONIC THERMOSTAT
IMPORTANT INSTRUCTIONS
BEFORE YOU GET STARTED
INSTALLATION
CONNECT THE POWER SUPPLY WIRES

Stelpro STZW402+ ELECTRONIC THERMOSTAT

IMPORTANT INSTRUCTIONS

THE THERMOSTAT MUST BE INSTALLED BY A CERTIFIED ELECTRICIAN.
Connect the thermostat to a 120 to 240 VAC power source ONLY and comply with load limits.
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.
SAVE THESE INSTRUCTIONS

BEFORE YOU GET STARTED

This thermostat is designed to control the baseboard and convector. It may be added (included) in a Z-Wave network.

THIS THERMOSTAT IS NOT COMPATIBLE WITH THE FOLLOWING INSTALLATIONS

Inductive load
Central heating system
Fan heater (unit consisting of a motor and a fan)
Heating load outside the specified ratings (refer to the Technical Specifications section)

PARTS SUPPLIED

one (1) thermostat
one (1) wall mounting plate located at the back of the thermostat
two (2) mounting screws
two (2) solderless connectors suitable for copper wires

INSTALLATION

The thermostat must be mounted to a connection box on a wall facing the heating unit, at around 1.5 m (5 feet) above the floor level, on a section of the wall exempt from pipes or air ducts.
Do not install the thermostat in a location where temperature measurements could be altered. For example:

close to a window, on an external wall, or close to a door leading outside
exposed directly to the light or heat of the sun, a lamp, a fireplace or any other heat source
close to or in front of an air outlet
close to concealed ducts or a chimney
in a location with poor air flow (e.g. behind a door) or with frequent air drafts (e.g. head of stairs)

ATTACH THE MOUNTING PLATE

Cut off power supply on lead wires at the electrical panel in order to avoid any risk of electric shock.
If an existing thermostat is being replaced, remove the previous thermostat.
Ensure that the air vents of the Ki thermostat are clean and clear of any obstruction.
Using a screwdriver, loosen the screw retaining the mounting base of the thermostat (do not completely remove the screw).

Then, remove the mounting base at the back of the thermostat by tilting it downward, then towards you.
Align and secure the mounting base to the connection box using the two screws supplied.

CONNECT THE POWER SUPPLY WIRES

Pass the wires from the wall through the hole at the base of the mounting base and connect them using the solderless connectors supplied. When making the connection with aluminum wire, make sure that you are using connectors identified CO/ ALR. Please note that the thermostat wires do not have polarity. Therefore, the way they are connected is not important.
Place all the wires into the connection box.

ATTACH THE THERMOSTAT

Align the little slots located on the top of the thermostat with those on the mounting base and secure the thermostat to the mounting base. Note that you can also position the thermostat on the left or the right side of the junction box (see below).
Then tighten the screw at the bottom of the unit.
Turn the power on.

INTERFACE

STELPRO-STZW402+Electronic-Thermostat-FIG.6

FUNCTIONS

AMBIENT TEMPERATURE
The temperature is displayed either in °C with a 0.5 °C resolution or in °F with a 1 °F resolution. The screen will display LO if the temperature drops below 0 °C (32 °F) and will display HI if the temperature rises above 50 °C (122 °F).

TEMPERATURE SETPOINTS
The setpoint may be edited by the user using the UP and DOWN buttons located on the thermostat. The setpoint may also be modified through the Z-Wave network.
The minimum setpoint is 5 °C (41 °F) and the maximum setpoint is 30 °C (86 °F).
NOTE: if the setpoint is set at 7 °C (45 °F) or below, the frost warning icon will be displayed to warn the user that water pipes might be subject to freezing.

HEATING POWER INDICATOR

Whenever the thermostat is actively heating the room, the heating status graph will display the heating percentage.

THERMOSTAT MODE

The thermostat has three modes: Comfort, Eco and Off. The first two modes have their own preestablished setpoint. Comfort: 21 °C (70 °F), Eco ( ): 17 °C (63 °F).
The user may change the setpoint to any value in the range described in the setpoint section. When the Eco mode is active, the Eco icon ( ) is displayed on the LCD. The thermostat mode may be changed locally on the thermostat by pressing the UP and DOWN buttons simultaneously for less than 3 seconds while on the main screen. The Eco setpoint is local to the thermostat and cannot be edited through the Z-Wave network.

Z-WAVE CONNECTIVITY ( )

If the thermostat is added (included) to a Z-Wave network, the connectivity icon will be displayed on the LCD, if the device is removed (excluded) from a Z-Wave network, the connectivity icon will disappear. The connectivity icon ****may blink if there is an issue with the Z-Wave radio circuit.

ADVANCED SETTINGS ( )

There are 6 advanced settings menus on the thermostat.

The advanced settings are the following:

Z-Wave menu ****: used to add (include) or remove (exclude) the thermostat from a Z-Wave network
Display format: used to switch the temperature format between °C and °F
Lock mode : used to lock the thermostat to prevent unauthorized tampering.
Outdoor temperature display : used to switch the outdoor temperature display on or off (when available). When set to (On), the outdoor temperature will be displayed if it’s available. When set to (Off), the outdoor temperature will not be displayed and the setpoint will always be displayed.
Backlight status while idle: used to set the backlight intensity when the thermostat is idle. 0%: the backlight will turn off after 15 seconds of inactivity 50%: the backlight will dim to 50% after 15 seconds of inactivity 100%: the backlight will always be at full intensity
°STELPRO information menu: used to gain information on the product
- Version
- Date of production (mm/dd)
- Year of production
- Z-Wave Node Id
- Baseboard/convector control checksum
- Reset to default

MODIFICATION OF THE SETTINGS:

To gain access to the advanced settings root menu, press the UP and DOWN buttons simultaneously for 3 seconds.
At this point each setting (1 to 6) may be accessed by using the UP and DOWN buttons.
To edit a value, choose a setting then simultaneously press the UP and DOWN buttons once. Press the UP or DOWN button to edit the value.
Confirm your choice by pressing the UP and DOWN buttons simultaneously one time at which point the icon will momentarily flash rapidly if a change has been made.
To exit the advanced settings press the UP and DOWN buttons simultaneously for 3 seconds at any time. If the thermostat is left idle it will revert back to the main screen after 30 seconds

Z-WAVE INCLUSION/EXCLUSION ( )

INCLUSION:

Make sure the Z-Wave hub is in the include mode (refer to your Z-Wave hub instruction manual).

To add (include) the thermostat to a Z-Wave network, enter Menu 1 (Z-Wave menu) and select (On). Then press the UP and DOWN buttons to start the inclusion process. During inclusion, (On) will be blinking and the connectivity icon will be animated in an increasing pattern. When the inclusion process has been completed, (On) will be displayed solid. If an error occurs, (Err) will be displayed for 3 seconds then the screen will revert to (Off) selection.

EXCLUSION:

Make sure the Z-Wave hub is in the exclude mode (refer to your Z-Wave hub instruction manual).

To remove (exclude) the thermostat from a Z-Wave network, enter Menu1 (Z-Wave menu) and select (Off). Then press the UP and DOWN buttons to start the exclusion process. During exclusion, (Off) will be blinking and the connectivity icon will be animated in an decreasing pattern. When the exclusion process is complete, (Off) will be displayed solid. If an error occurs, (Err) will be displayed for 3 seconds then the screen will revert to (On) selection.

To achieve better network performance, it is recommended to always add (include) your Z-Wave devices starting from the closest one to the farthest one.

FACTORY RESET

The thermostat may be manually reset to its original factory settings.

When this is performed, all parameters are reset to their default values and the thermostat is removed (excluded) from the Z-Wave network.

To reset the thermostat to its default settings:

Enter the advanced settings
Enter the °STELPRO menu (menu 6)
Navigate to the (def) screen using the UP or DOWN buttons.
Enter the (def) menu by pressing the UP and DOWN buttons for less than 3 seconds
Select (yes) and confirm the selection by pressing the UP and DOWN buttons for less than 3 seconds.

If the thermostat was added (included) in a Z-Wave network, it will send a (device reset locally) notification.

The thermostat will then reset itself.

Please use this procedure only when the network primary controller is missing or otherwise inoperable.

POWER OUTAGE

If a power outage occurs, the thermostat will stop working but all configuration is saved.

OUTDOOR TEMPERATURE ( )

When connected to a Z-Wave network, the thermostat may display the outdoor temperature provided by an external sensor.
When available, the outdoor temperature is displayed instead of the setpoint, providing that the outdoor temperature display setting is set to (On). If no temperature is received within a 4-hour timeframe, the outdoor temperature will disappear and the setpoint will be displayed. In order to display the outdoor temperature, an external sensor needs to be part of the Z-Wave network. It may be a physical sensor or a weather station app. Refer to your Z-Wave hub controller instructions manual to find how to associate both devices. On some Z-Wave hub controllers, an app may be used to provide the outdoor temperature.

TROUBLESHOOTING

PROBLEM CODE	DEFINITION
LO	Temperature is below 0 °C (32 °F), heating will be always active
HI	Temperature is above 50 °C (122 °F), heating will be always inactive
—	Temperature sensor is defective, heating will always be inactive. Call

technical support.
ERR| The connection could not be established with the Z-Wave network. Make sure the thermostat is within range of the Z-Wave controller or a Z-Wave repeater and make sure the Z-Wave controller is in inclusion or exclusion mode.
E1| Secondary temperature sensor is defective. The thermostat will still control the temperature but performance may be diminished. Consider replacing the thermostat.
PROBLEM| SOLUTION
---|---
The thermostat is hot| In normal operating conditions, the thermostat housing may become hot at maximum load. That is normal and will not affect the effective operation of the thermostat.
Heating is always on| Check if the thermostat is properly connected. Refer to the installation section.
Heating does not run even if the thermostat indicates it is on| Check if the thermostat is properly connected. Refer to the installation section.
The display does not turn on| Check if the thermostat is properly connected. Refer to the installation section.Check the power supply at the electrical panel.Check if the heating unit has a switch. If so, ensure that this switch is turned on.
The display turns off a few min- utes and then turns on again| The thermal protection of the heating unit has opened due to overheating. Check if the heating unit is in good oper- ating condition and that clearance around the appliance is according to the manufacturer’s specifications.
The displayed ambient temperature is incorrect| Check the presence of an air stream or a heat source near the thermostat, and correct the situation.
The connectivity icon is blinking on the main screen| Make sure the thermostat is properly associated with the Z-Wave controller.
Setpoint and mode cannot be changed| The thermostat is locked, turn OFF the lock mode

N.B. If you are unable to solve the problem after having verified these points, please communicate with our customer service. Consult our website for contact information.

TECHNICAL SPECIFICATIONS

Supply voltage	120/240 VAC, 50/60 Hz
Minimum current with resistive load	1.25 A

300 W @ 240 VAC
150 W @ 120 VAC
Maximum current with resistive load| 16.7 A
4000 W @ 240 VAC
2000 W @ 120 VAC
Temperature display range| 0,5 °C (1 °F)
Temperature display resolution| 0,5 °C (1 °F)
Temperature setpoint range| 5 °C à 30 °C (41 °F à 86 °F)
Temperature setpoint increment| 0,5 °C (1 °F)
Storage temperature| -50 °C à 50 °C (-58 °F à 122 °F)
Operating temperature*| -20 °C à 50 °C (-4 °F à 122 °F)

*LCD performance might diminish below 0 °C (32 °F)

Z-WAVE TECHNICALS INFORMATION

Z-WAVE INTEROPERABILITY

This product can be included and operated in any Z-Wave network with other Z -Wave-certified devices from other manufacturers and/or other applications. All non-battery-operated nodes within the network will act as repeaters regardless of vendor to increase reliability of the network.

Z-WAVE ASSOCIATION

The Z-Wave Association Command Class is supported by the thermostat.

The thermostat supports the lifeline as Group1 and only one Node Id is supported in this group (the Z-Wave controller).

The following reports are sent via the Lifeline:

Basic Report
Device Reset Locally Notification
Thermostat Mode Report
Thermostat Setpoint Report
Sensor Multilevel Report
Thermostat Operating State Report

Z-WAVE BASIC COMMAND CLASS

The Z-Wave Basic command class is supported by the thermostat in the following way:

To trigger the Eco mode on the thermostat: send it a Basic SET (0x00) command (Energy saving mode). To trigger the Comfort mode on the thermostat: send it a Basic SET (0xFF) command (Comfort mode)

If a setpoint change is sent through the Z-Wave network, the thermostat mode will automatically switch to Comfort mode. The Z-Wave modes are described in the following table: