FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
RF Radiation Exposure Statement: This equipment complies with FCC and Industry Canada RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the antenna and all persons.
INDUSTRY CANADA
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
Please read these instructions carefully BEFORE INSTALLING AND USING the ST920WF Thermostat. This manual is meant to be used as a reference guide for the installation, configuration, and maintenance of your device.
Using this Manual
For the latest Instructions go to: WWW.SALUSINC.COM
Special Attention Boxes
This manual uses special attention icons to alert the reader of important safety concerns, information important to the reliable operation of the controls or helpful installation/setup information.
Installing the Thermostat
There are five steps to installing the thermostat:
Tools
You may need the following tools to install the ST920WF Thermostat:
Turn Off Power to the HVAC System
Locate the HVAC panel breaker and turn OFF the system. Before removing the old thermostat, change the temperature setting to cause a heating or cooling call. When the thermostat indicates there is a call, make sure the HVAC System is not operating.
Determine Wiring Configuration
If the ST920WF Thermostat is being installed in a new system or if the wiring changes are intended, refer to Appendix A for the wiring configurations and skip to Install the Mounting Plate.
When replacing a thermostat and replicating the wiring of the existing thermostat is desired on the ST920WF the following applies.
Wire Color Record
HP | NON-HP | Wire Color |
RC | RC | |
RH | RH | |
C | ||
G | ||
Y1 | ||
Y2 | ||
O/B | W1 | |
AX | W2 | |
L |
Remove Old Thermostat
Remove the old thermostat from the wall, taking care not to allow the wiring
to fall inside the wall.
Use the included wall anchors and screws to attach the Mounting Plate to the wall, making sure the wires run through the center opening. To cover paint or screw holes on the wall behind the thermostat, insert the Wall Plate between the Mounting Plate and the wall as shown. Both plates are secured with the same screws.
Attach Display to Mounting Plate: Line up sockets in the back of the thermostat with the posts on the wall plate and snap it into place. Make sure the connector pins are not bent and wires do not interfere with the thermostat engagement. The thermostat must be fully seated on the wall plate to operate correctly.
Turn on the Power to the HVAC System
When the ST920WF is first powered or if a Factory Reset is performed, the above boot sequence will be displayed. The last screen displays the thermostat model and firmware version number.
Mobile Setup
When the text begins scrolling across the text field, the thermostat is ready to connect with the smart device application. Device Boot Sequence
Temperature units | °C or °F | |
Environmental | Operating: | 32° to 122°F (0° to 50°C) |
5 to 90% Relative Humidity (non-condensing) | ||
Storage: | 14° to 140°F (-10° to 60°C) | |
5 to 90% Relative Humidity (non-condensing) | ||
Communications | 802.11 b/g/n, 2.4 GHz band Bluetooth v4.2 BR/EDR and BLE (for Commissioning) | |
AC power | 18-30 VAC at RC and C terminals 5 relay outputs rated for 1A @ 18-30 VAC | |
Dimensions | 3.9” x 4.2” x 0.9” 10.0cm x10.6cm x 2.3cm | |
Weight | 0.6 lbs (297 g) | |
Compliance | FCC, Industry Canada | |
Warranty | 5-year limited warranty | |
Compatible Devices | SA918 Wire Extender Module |
Note: Specifications are subject to change without notice.
For troubleshooting, instructions go to: https://www.salusinc.com/downloads
SALUS North America, Inc. (“Salus”) warrants that for a period of five (5) years (“Warranty Period”) from the date of purchase by the consumer (“Customer”), this device, excluding batteries (“Product”), shall be free of defects in materials and workmanship under normal use and service in accordance with all supplied instructions. During the warranty period, Salus shall, at its option, repair or replace any defective Products, at no charge for the device. Any replacement and/or repaired devices are warranted for the remainder of the original Warranty Period or ninety (90) days, whichever is longer. This warranty does not cover removal or reinstallation costs. This warranty does not apply to any Product (i) which has been modified, repaired, or altered, except by Salus or an authorized Salus representative, (ii) which has not been maintained in accordance with any handling or operating instructions supplied by Salus, or (iii) which has been subjected to unusual physical or electrical stress, misuse, abuse, negligence, or accidents.
This warranty is the only express warranty Salus makes for the Product. Any implied warranties, including warranties of merchantability or fitness for a particular purpose, are limited to the Warranty Period or the shortest period allowed by law. SALUS SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states and provinces do not allow the exclusion or limitation of incidental or consequential damages or limitation on the duration of implied warranties of
merchantability or fitness, so these exclusions or limitations may not apply to you.
No oral or written information or advice given by Salus or a Salus-authorized representative shall modify or extend this warranty. If any term is held to be illegal or unenforceable, the legality or enforceability of the remaining terms shall not be affected or impaired. The customer’s sole and exclusive remedy under this limited warranty is product repair or replacement as provided herein. If a Product under warranty is defective, the Customer may:
Appendix A – Wiring Diagrams
ST920WF Thermostat Terminal Reference | ||
Terminal | Non-Heat Pump | Heat Pump |
RC | 24 VAC Power – Cool | |
RH | 24 VAC Power – Heat | |
C | 24 VAC Common (Use SA918 Wire Extender if C-wire is not available) | |
G | Fan | |
Y1 | 1st Stage Cooling | 1st Stage Compressor |
Y2 | 2nd Stage Cooling | 2nd Stage Compressor |
W1/OB | 1st Stage Heating | Reversing Valve |
W2/AX | 2nd Stage Heating | Aux/Emergency Heat |
L | Not Used | Check/Fault Input |
Conventional Single Transformer Heat and Cool System
Conventional Two Transformer Heat and Cool System
Single Transformer Heat Pump System
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