Please read these instructions carefully before installing and using the Optima S Thermostat. This manual is meant to be used as a reference guide for the installation, configuration and maintenance of your device.
The manufacturer does not accept responsibility for any damage caused by not following these instructions.
The Optima S is available in 2 configurations: Standard and Router to the network.
| Model | Description |
| ST898ZB | This model functions as a standard ‘End Device’ and may be powered by 24VAC or battery. |
| SA898ZBR | This model functions as a Router to the network and will route messages between devices on the network. Because of the higher level of communications this model must be powered by 24VAC with a C-wire to avoid draining the batteries. |
There are five basic steps to installing the thermostat:
Buttons
There are six (6) button areas on the Optima S touchscreen display as shown on the right and defined below. The Reset button is a recessed button on the bottom side surface of the device, below the logo.
| Button | Definition | Home Screen | Settings Screens |
| Main | Home Screen button | Not used | Returns display to Home Screen |
| Mode | Operating mode select (Heat, Cool, Auto or Off) | Change operating mode | Not used: mode icons are displayed if needed |
| Fan | Fan mode select (On or Auto) | Change Fan mode or set Permanent Hold | Not used |
| Settings | Device settings | Enter Settings screens | Move between Settings screens |
| Up | Increment or confirm changes | Increase Set Point | Increment options / Confirm |
| Down | Decrement or cancel changes | Decrease Set Point | Decrement options / Cancel |
| Reset | Restore device to Home screen | ||
Indicators
The following indicators are available on the LCD display
When power is applied to the Thermostat the display will cycle through an initialization sequence where it performs a display test and displays the firmware version. If it was not previously associated with a network, it will display JOining… 10 as it attempts to join a network. The number will count down from 10 minutes to 0.
When it either finds a network, times out, or pairing is canceled by the user, the thermostat will default to the setting HVAC EQPT TYP.
If there is no button activity for 30 seconds, the display will revert to the Home screen. If the thermostat had previously joined a network, it will default to the Home screen. Once initialization is complete, the Optima S is ready for use, or to be configured for the intended application. The Optima S may be configured manually through the keypad, or by using the SALUS Smart Home App. To use the desktop App go to https://us.salusconnect.io/login
To download the mobile App search for Salus Smart Home on the Apple App Store and Google Play
There is an extensive list of configuration settings that can be accessed by tapping the
Navigating the Settings Menu
To move forward and back through the Settings menu and make any changes to the settings, the buttons function as follows:
| Touch Button | Type | Action |
| Enter Settings menu, and Save and go to next parameter setup | ||
| + or | Short | Increment parameter value by 1 |
| Long | After long press time, increment by 1 at 4 Hz rate while key remains down | |
| – | Short | Decrement parameter value by 1 |
| Long | If applicable, decrement value by 1. After long press time, decrement by 1 at 4 Hz rate while key remains down | |
| Back | — | Save and go to previous parameter setup |
After 30 seconds of no user input, changes will be saved, and the device will return to Home screen.
Press the
The thermostat defaults to a Heat Pump equipment type with configuration settings typical for that type of equipment.
Equipment Type allows you to select the equipment the Optima S will be controlling.
| EQPT TYP- | HP (default) | For conventional Heat Pumps | + or – | Use the + or – buttons to step through the available options. |
| HP+EH | For Heat Pumps with Emergency Heating | |||
| HT/AC | For forced air Heating and Cooling systems | |||
| –/AC | For Cooling only systems | |||
| HT/– | For Heating only systems |
If HP or HP+EH are selected, you must set the Reversing Valve operation
| REVERS VALVE- | O(default) | Reversing valve for Heat switching to Cool | + or – | Use the + or – buttons to select O or B. |
| B | Reversing valve for Cool switching to Heat |
If Heat + AC or Heat only are selected, you must set the Fan Control
| FAN CNTL- | FURNC (default) | Used with Gas heating elements | + or – | Use the + or – buttons to FURNC or TSTAT. |
| TSTAT | Used with Electric heating elements |
The Auxiliary Relay function is shown when either Heat Pump or AC only is selected. For all other HVAC types, the output is configured for heating
| AUX FUNC- | NONE | No function | + or – | Use the + or – buttons to step through the available options. |
| HMDFY | For control of a humidifier | |||
| DHMFY | For control of a dehumidifier | |||
| HEAT | For 2nd stage heating control (not for AC only) |
When the Equipment Type is Heat Pump or AC only, and the Auxiliary Relay function is set for Humidify, or Dehumidify, you must configure the relay operation.
| AUX ACTIVE- | CLS (default) | Functions like a Normally Closed relay | + or – | Use the + or – buttons to select Close or Open. |
| OPN | Functions like a Normally Open relay |
The Optima S supports a remote temperature sensor for control if the thermostat is not located in the optimum location due to existing wiring. The remote sensor, SS909ZB, may be paired with the thermostat and the value will be displayed on the Optima S. The Settings menu allows you to select the internal or external sensor for control.
| TEMP SEL-INT (default) TEMP SEL-RMT (Zigbee) | Select Internal (INT) or remote (RMT) temperature sensor 1 | Use the + or – buttons to step through the available options. |
1 See Pairing Remote Temperature Sensor on page []
The displayed value for the temperature internal and external (if selected) sensor may be adjusted to increase or decrease the value. The thermostat will control to this value.
| INT | TEMP | OFFST | 0 | (default) | Internal temperature offset | ±4 in 0.5ºC steps ±8 in 1ºF steps | Use the + or – buttons to step through the |
| RMT | TEMP | OFFST | 0 (default) | Remote temperature offset | ±4 in 0.5ºC steps ±8 in 1ºF steps | available options. | |
Depending on the Equipment Type selected, you may have 2 heating stages and 2 cooling stages. The parameters below allow you to set the separation between when the 1st stage energizes, and the 2nd stage energizes below set point (heating) and above set point (cooling).
| DLTA 1ST STAGE (heating) 2 | 0.25°C/0.5°F (default) | Heating differential 1st stage | 0.25 – 1ºC in 0.25º steps 0.5 – 2ºF in 0.5º steps |
| DLTA 2ND STAGE (heating) 2 | 1.0°C/2.0°F (default) | Heating differential 2nd stage | 0.25 – 2.0ºC in 0.25º steps 0.5 – 4.0ºF in 0.5º steps |
| DLTA 1ST STAGE (cooling) 3 | 0.25°C/0.5°F (default) | Cooling differential 1st stage | 0.25 – 1ºC in 0.25º steps 0.5 – 2ºF in 0.5º steps |
| DLTA 2ND STAGE (cooling) 3 | 1.0°C/2.0°F (default) | Cooling differential 2nd stage ° | 0.25 – 2.0ºC in 0.25º steps 0.5 – 4.0ºF in 0.5º steps |
To avoid short cycling of the compressor, the Y1Y2 Min Off Time delays how long the cooling output will remain OFF after cooling is satisfied. The output will not reenergize until the Y1Y1 Min Off Time expires.
| Y1Y2 MIN OFF T (Not applicable for Heat Only) | 5.0 (default) | Compressor protection minimum OFF time | 0 – 5 minutes in 0.5 steps |
When cooling is satisfied and the output turns Off, the fan will continue to run for the time designated by FAN DELAY to minimize condensation on the cooling coil.
| FAN DELAY | 0.5 (default) | Fan control relay keeps fan running for Fan Delay after cooling stops. | 0 – 5 minutes in 0.5 steps |
The heating and cooling set points may be set to a limited range to prevent over heating or under cooling a space to save energy.
| HEAT | MAX | SETPT | 28.5°C/83°F (default) | Max Heating Set point | 20 – 30 ºC in 0.5 º steps 68 – 86 ºF in 1 º steps |
| COOL | MIN | SETPT | 8°C /46°F (default) | Min Cooling Set point | 5 – 24ºC in 0.5º steps 41 – 75ºF in 1º steps |
When EQPT TYP is HP, HP+EH and HT/AC you can set a DEAD BAND which determines the number of degrees between where cooling turns Off and heating turns On and vice-a-versa.
| DEAD BAND | 1.5°C /3°F (default) | Dead band value is used for Auto mode. | 1.5 – 5ºC in 0.5ºC steps 3 – 10ºF in 1º steps |
The HEAT PROTECT set point creates a limit, above which the heating outputs will be de-energized regardless of the system configuration. Not displayed if AC only.
| HEAT PROTECT | — (default) = Off | Heat Protect Setpoint | 30 – 35ºC in 0.5 º steps 86 – 95 ºF in 1º steps |
The LOCK SRC determines if the key lock function can be controlled by the thermostat keypad (hold + and – buttons for 3+ seconds) and the App, or just by the App
| LOCK SRC-KY+APP (default) LOCK SRC-APP | Key Lock Source (Device+App or App Only) | Use the + or – buttons to switch between values. |
The LCK function allows you to lock any combination of Parameter Settings, Set Point, Fan Speed, and Mode to prevent changes using the thermostat buttons.
| DEGREE UNITS | °C ° F (default) | C/F Selection | Use the + or – buttons to switch between ºF and ºC |
The display brightness may be adjusted from 1 (dim) to 10 (brightest). Increasing display brightness will impact battery life.
| BRIGHTNESS | 6 (default) | Set display brightness | Use the + or – buttons to change brightness 1 to 10 |
The display may be configured to dim or turn off after the selected time frame, or if AC powered it can b set to remain on continuously.
| DISPLAY | ON-DM (default) | 4 | DM = dims display after 10 seconds | Use the + or – buttons to change the |
| DISPLAY DISPLAY DISPLAY DISPLAY | ON-10 ON-20 ON-30 ON-YES 4 | 10, 20 & 30 = Display On Time in seconds YES = The display remains on | display time out. |
4 When powered by batteries and set to DM or YES, the display will turn off after 10 seconds.
Prompts may be shown in English, French or Spanish based on language preference.
| LANGUAGE- | EN ES FR | English (default) Spanish French | Language Selection. | Use the + or – buttons to change the language prompts between English, French, and Spanish |
The time display may be set to either a 24-hour format or a 12-hour format
| 24 | HOUR | CLOCK | (default) | Time Display Format | Use the + or – buttons to change |
| 12 | HOUR | CLOCK | the clock setting |
The Optima S has an internal humidity sensor which is displayed by default. If you do not wish to see the humidity value, you can choose to hide the humidity reading.
| SHOW HUMIDITY (default) HIDE HUMIDITY | Show or hide humidity reading | Use the + or – buttons to switch between Show and Hide Humidity. |
If Equipment Type Heat Pump (HP) or AC only (–AC) is selected, and the Auxiliary Relay function is set to Humidify or Dehumidify, the Humidify Set Point prompts will be displayed. This is the set point around which the humidifier or dehumidifier will be controlled.
| HUMIDITY SETPT | 45% (default) | Set point for controlling humidifier/dehumidifier | Use the + or – buttons to change the set point value between 20 – 60%. |
If the Optima S does not have internet connection through the Gateway, you must
manually set the Time, Date and Daylight Savings time.
| TIME 00:00 5 | increment Hour increment Minute | Set Time and Date | Tap the symbol to increase the value for Hour and Minute. |
| DST ADJUST ON (default) 5 DST ADJUST OFF | Enable/disable Day Light Saving time | Use the + or – buttons to change between On and Off. | |
| SET YEAR 2020 (default) 5 | Set Year | Use the + or – buttons to change the value of year. | |
| DATE M/D-1/01 (default) 5 | increment Month increment Date | Set Month and Date | Tap the symbol to increase the value for Month and Date. |
Not displayed if connected to a Gateway and the internet
| EDIT- | WKDY/WKND (default) | Current schedule mode: | After OTA, if there is no schedule mode in |
| WEEKLY DAILY WKDY/SA/S SCHD OFF | Press √ to edit schedule. Press + or – to step through schedule types 6 | the device side and it has joined network, then schedule mode is CLOUD, device receives schedule setpoint from Gateway. |
6 Press to access the Schedule menus to set the Interval, Time and Set Point. See Schedule configuration page []
The Lock/Unlock function allows you to lock and unlock the keypad through the Settings menu in addition to through the keypad and/or App.
| LOCK KEYS? 7 | press √ to lock keys | To lock and unlock the keypad. |
| UNLOCK KEYS? 7 | press √ to unlock keys |
7 Only displayed when Lock Source = KY+APP and Key Lock Type ¹ NONE
The Identify mode sends an Identify command to paired devices which support it and their display, or LED will flash on and off to indicate they are connected devices.
| IDENTIFY? 8 | Press √ to Initiate Identify mode Identify Check 10 is displayed | Identify devices on the shared channel | Identify mode counts from 10 to 0 minutes |
8 Most simple temperature, door/window, and water leak sensors do not support Identify.
Tapping the ! to Join Network places the thermostat in a mode where it will Join an available Zigbee network. The network channel will be displayed for 3 seconds once the thermostat successfully joins.
| JOIN NETWORK? | Press √ to join network, Press x to exit or 10 min time out | Initiate Join to an available network | Displayed only if it has not joined network. |
Note: The network Gateway or Coordinator must also be in the Join mode scanning for devices.
Used to force the thermostat to leave the current network and search for a new network to join
| NEW NETWORK? | Press √ to delete network setting and Join next network. | Delete network settings and Join new network | Displayed only if it is Joined to network |
Note: The network Gateway or Coordinator must also be in the Join mode scanning for devices.
If the thermostat is not functioning as expected, you may reset it to factory defaults.
All configuration and network settings will be cleared.
| FACTORY RESET? | Press √ to factory reset to default settings and reboot. | Reset to Factory default settings |
Note: You may first want to try a hardware reset by momentarily pressing the reset button on the bottom of the thermostat. A hardware reset will not clear configuration and network settings.
The Optima S home screen provides offers basic functions using the Home Screen controls.
To change the set point, simply touch the Up (+) or Down (+) button. The ambient temperature will move to the time display area and the current set point will be displayed in the Main Temperature display. The Message Display will indicate which set point is being changed.
Touch the Main Temperature display to save the new set point and return to the Home Screen. The thermostat will save the new set point after 3 seconds of no activity and return to the Home Screen.
There is a minimum dead band between the Heat and Cool set points. If the set point being changed gets too close to the other set point, the other set point will be adjusted to maintain the separation. The default separation is 1.5°C / 3°F.
Fan Control
The Fan operates in one of two modes, Fan Auto and Fan On. Tapping the Fan icon switches between the two modes.
When you want the fan to be on regardless of the heating or cooling state, press to display the Fan On icon on the home screen.
There will be a slight delay between selecting Fan On mode and the fan turning on.
To change the operating mode of the system, simply touch the Mode button to select between the following:
If enabled. the keypad functions may be locked or unlocked from the keypad (see settings LOCK SRC). To lock or unlock the selected functions (see settings LCK-XXX) press the + and – buttons for 3 seconds. The buttons for the selected function will disappear and appear as the function is locked and unlocked.
The Optima S includes a flexible programmable schedule to vary set points based on time of day to reduce energy when there is an opportunity to relax the comfort level. While the schedule can be set using the keypad, it is more efficient to use the App. There are 5 schedule modes, each having up to 6 schedule intervals. Each Interval has a Start Time and the ability to set heating and/or cooling set points depending on the equipment type. The 5 modes are:
| WKDY/WKND | This is a 5+ 2 schedule with M/T/W/T/F with one schedule S/S another. |
| WEEKLY | With this schedule, every day uses the same Interval settings. |
| SCHD OFF | This ‘Permanent Hold’ mode turns the schedule Off and set points are set using the keypad or App. |
| WKDY/SA/S | This is a 5 + 1 + 1 schedule with M/T/W/T/F with one schedule Sat and Sun each with their own. |
| DAILY | This schedule mode each day is configured with its own schedule intervals. |
To select the Schedule mode, press the ! button
Tap the Settings button to edit the Schedule Interval 1
Continue to edit the Interval #, Time and Set Point(s) for each of the Intervals desired by advancing the Interval and editing the Time and Temperature. For applications where there is both heating and cooling, once you have set the heat set point, tap the mode button so the cooling icon s If you wish to skip an Interval (ex 4 intervals: Sleep, Wake, Leave, Return) allow the Time setting for unwanted intervals to be blank (Time = –:– and Temperature = – -). When using a Daily, WKDY/WKND, or WKDY/SA/S schedule, to select the alternate periods, with the Interval # flashing continue to tap the + or – buttons to step through the intervals for each; Day, WKDY & WKND, and WKDY, SA and S
Temporary Hold
The thermostat may be placed in a temporary hold state which will temporarily override the schedule settings until the next interval time is reached. To temporarily override the scheduled set point, simply increase (+) or decrease (-) set point. When the next interval time occurs, the thermostat will resume its programmed schedule.
Permanent Hold
To permanently override the schedule, you must turn the schedule Off either through the thermostat menu (TYPE-SCHD OFF), or by using the App. When the schedule is Off the Permanent Hold icon will appear on the thermostat display. The current set point will be maintained until a future change is made, or The Permanent Hold is turned Off by selecting a Schedule mode.
Pairing Optima S with SS909ZB Temperature Sensor
When the thermostat is located where it may not read the optimum temperature for the comfort zone, a remote wireless sensor (SS909ZB) may be paired with the thermostat and the ambient temperature of the remote sensor will be used for control. If the sensor has not be previously associated with a Zigbee network:
If the SS909ZB had previously joined the network, but is not paired with the Optima S:
* The ST898ZBR thermostat functions as a router to the network. Because of the frequent need to transmit and receive the ST898ZBR must be powered by 24VAC with RC and C wires. Specifications may change without notice
The thermostat does not call for heat and/or cooling.
SALUS North America, Inc. (“Salus”) warrants that for a period of two (2) 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 no 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, misuses, 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.
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:
This warranty gives you specific legal rights, and you may also have other rights that vary from jurisdiction to jurisdiction. If you have any questions regarding this warranty,
please write Salus at: SALUS North America, Inc.
2215 Cornell Avenue
Montgomery, IL 60538
Terminal Definitions
| Optima S Thermostat Terminal Reference | ||
| Terminal | Non-Heat Pump | Heat Pump |
| RJP | Power Jumper (RH) | |
| RC | 24 VAC for Cooling System or Jumper to RJP | |
| RH | 24 VAC for Heating System | 24 VAC for Heat Pump |
| C | 24 VAC Common Return | |
| Y1 | Single or 1st Stage Cooling | Single or 1st Stage Compressor |
| Y2 | 2nd Stage Cooling | 2nd Stage Compressor |
| W1AX | Single or 1st Stage Heating | Auxiliary or Emergency Heat |
| W2OB | 2nd Stage Heating | Changeover Valve |
| G | Fan Control | |
| L | Not Used | System Monitor |
ST898ZBR requires RH/RC and a C-wire and cannot operate on batteries.
Conventional Single Transformer Heat and Cool System
Conventional Two Transformer Heat and Cool System
Floor Heating System
Two Transformer Heat Pump Systems
FCC Statements
WARNING: 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. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
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:
FCC and Industry Canada 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:
For Sales assistance: sales@salusinc.com
For technical support: support@salusinc.com
SALUS North America, Inc.
2215 Cornell Avenue
Montgomery, IL 60538
DOWNLOAD MANUALS:
SALUS ST898ZB OPTIMA S Touchscreen Thermostat User Guide
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SALUS ST898ZB OPTIMA S Touchscreen Thermostat Product Specification Sheet
SALUS ST898ZB OPTIMA S THERMOSTAT INSTALLATION GUIDE
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