SST-W100
15Pages

Savant Wireless Thermostat: SST-W100 Description The Savant Wireless Thermostat (SST-W100) is a WiFi enabled wireless digital thermostat designed to control Heating, Ventilation and Air Conditioning (HVAC) systems. Feature Summary • Wi-Fi enabled thermostat The SST-W100 contains a robust thermostat interface and is designed to integrate seamlessly into a Savantcontrolled environment. • Supports standard or heat pump HVAC systems Using the TrueControl iPad® app for the HVAC Scheduler allows for instant changes and scheduling of climate setpoints throughout areas of a facility or home. The app also provides an instantaneous and a historical view of the temperature, humidity, setpoints, and stage information. • Local temperature displays on backlit LCD HVAC System Compatibility • Six buttons with on-screen labels • Centralized HVAC systems or separate heating/ cooling systems can use separate Rh/Rc transformers • Standard gas/electric HVAC system: two-stage heating, two-state cooling • Heat pump HVAC systems: three-stage heating, two-state cooling • Fan System: Selectable for gas or electric heat systems • Heat pump changeover valve (reversible valve): selectable for changeover with heat or changeover with cool • Emergency heat: in heat pump mode emergency heat is directly selectable from the thermostat • Includes 128 x 64 backlit graphical display • Setpoint display and control • System mode (off, auto, heat, and cool) • Fan display and control (auto and on) • Fahrenheit or Celsius modes • Optional remote sensors • Integrates easily with TrueControl™ • Automatically sends changes, so there is no polling.

Savant Wireless Thermostat: SST-W100 Thermostat Features and Operations of HVAC systems The SST-W100 supports two types of HVAC systems, which are set up from the Mechanical Settings menu: • Standard gas/electric system • Heat pump system The next table shows the staging information for a standard gas/electric system. The delta T setting is the delta, or difference between, the setpoint and current temperature for determining when a heat or cool call comes on. The “delta” is the number of degrees away from setpoint. NOTE: The ON values shown for stage 1 or stage 2 Delta T are the default...

Savant Wireless Thermostat: SST-W100 The next table shows the staging information for a heat pump system. The delta T setting is the delta, or difference between, the setpoint and current temperature for determining when a heat or cool call comes on. The “delta” is the number of degrees away from setpoint. NOTE: The ON values shown for stage 1 or stage 2 Delta T are the default settings—for either Fahrenheit or Celsius modes. The default OFF Delta T for all stages is zero (0). The default settings can be changed in the Installer Settings menu. Use this legend to identify the outputs shown...

Display Location for Humidity Reading Savant Wireless Thermostat: SST-W100 FS120701 Multistage Heating Control Graph Thermostat Staging Functional Specification Multistage Heating Control RCS Standard When configured with a multistage heating system, the the A 7/16/12 shows the expected temperature control behavior Revision next figure shows the expected temperature control behavior When configured with a multistage heating system, following of the the thermostat (SST-W100). thermostat (SST-W100). of 76 75 Heat Pump System 2 Stage Heating w/Aux Heat Room Temperature Heating Setpoint Room...

Savant Wireless Thermostat: SST-W100 Delta On/Off Settings As shown in the previous graph, each stage (H1, H2, H3, C1, C2) has a delta in degrees for turn-on value, and turnoff value. The default settings are shown in the next table. Parameter Range (degrees) Default Value (degrees) Stage Enables Heat Stage 2, Auxiliary Heat and Cool Stage 2 all have independent enable and disable functionality. Fan Cycler The fan cycler will cycle the fan on and off based on the fan uptime and fan downtime settings. The uptime has a range of 0-120 minutes with a default of zero (off). The downtime has a...

Savant Wireless Thermostat: SST-W100 Humidity Features The SST-W100 provides the capability to monitor, display and control the humidity in a room. The control is either implemented by extending the cool cycles or by the control of built-in auxiliary relays. These relays can be configured to control a humidifier, dehumidifier, vent or DH Fan control. Humidity Control Logic The Humidity Control Logic (HCL) will extend a cool call if the following conditions are met. The HCL logic will not initiate a cool call—the HCL will terminate its cool call upon any of these conditions not being met as...

Savant Wireless Thermostat: SST-W100 Humidity User Settings The following user settings can be configured. Humidity Setpoint Used by both the HCL and the auxiliary relays when in humidifier or dehumidifier mode. Range is 20%-80% in 55 increments. Default is 55%. Humidity Mode Enables or disables the HCL logic. Humidifier Mode Enables or disables the Humidifier logic. This is only exposed, if either A1 or A2 is set to Humidifier. Dehumidifier Mode Enables or disables the Dehumidifier logic. This is only exposed if either A1 or A2 is set to Dehumidifier. Humidity Installer Settings The...

Savant Wireless Thermostat: SST-W100 Remote Sensor Features The thermostat has two remote sensor connections, RS1 and RS2. When connected RS1 will replace the internal temperature sensor. RS2 can either be an averaging sensor (indoors), or an outdoor temperature sensor depending on the remote sensor setup in the thermostat’s Installer Settings menu. SST-W100 displays outside temperature when remote sensor installed in outdoor location. The remote sensor function depends on what sensors are connected, as outlined in the next table. Internal only Use internal sensor for room temperature Use...

Savant Wireless Thermostat: SST-W100 Display Features The SST-W100 includes a 128x64 backlit graphical display. Using this display screen the user can monitor the temperature, humidity and the state of the HVAC system. From the screen, the user can also change modes and setpoints. By pressing and holding the Hold button, the installer can modify any of the parameters used in the algorithms supported. There is also a list of features that belong to the display itself, that are described below the figure. Room Temperature Backlight Display Heating/Cooling Mode Selection Run/Hold Mode...