AMX VIEWSTAT COMMUNICATING THERMOSTATS Instruction Manual
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AMX VIEWSTAT COMMUNICATING THERMOSTATS Instruction Manual

AMX VIEWSTAT COMMUNICATING THERMOSTATS Instruction Manual

Communicating thermostat
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ViewStat
Communicating Thermostat
H VA C C o n t r o l s

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Summary of Contents for AMX VIEWSTAT COMMUNICATING THERMOSTATS

  • Page 1 instruction manual ViewStat Communicating Thermostat H VA C C o n t r o l s...
  • Page 2 This warranty extends only to products purchased directly from AMX Corporation or an Authorized AMX Dealer. AMX Corporation is not liable for any damages caused by its products or for the failure of its products to perform. This includes any lost profits, lost savings, incidental damages, or consequential damages. AMX Corporation is not liable for any claim made by a third party or by an AMX Dealer for a third party.

  • Page 3: Table Of Contents

    Wiring the VST-TSTAT to a VST-DIST Distribution Panel ..........11 Mounting the Base to a Wall ................... 13 Connecting the ViewStat to AMX Control Systems............13 Connecting to an Axcess Control System (via AXC-232++, AXB-EM232, or Axcent3/PRO) 15 Connecting to an Axcess Master Controller via the RS232/422/485 (DB-9) Port ....16 Connecting to NetLinx Integrated Controllers via the RS232/422/485 (DB-9) Port ....
  • Page 4 Table of Contents Address the Thermostats and Set Highest Address ............27 Wiring Diagrams......................29 Single-stage furnace and AC configuration................29 Two-stage furnace and two-stage AC configuration.............. 30 Roof top unit (two-stage heat and two-stage cool) configuration........... 31 Boiler with AC (two transformers) configuration..............
  • Page 5 Table of Contents Operating the Thermostat ..................63 Front Panel Components ....................63 Message Display........................63 Scroll/Set-up buttons......................63 Mode button ........................... 63 Adjust buttons ........................64 Fan button ..........................64 Enter button..........................64 Main display ........................... 64 Operating The Thermostat ....................65 Selecting the Mode ........................
  • Page 6 Table of Contents ViewStat Communicating Thermostat...

  • Page 7: Product Information

    (see theViewStat Installation and Wiring section on page 7). If there are any specific wiring needs or unusual wiring configurations please contact AMX Technical Support, and we will endeavor to find the answer, before your installation. If necessary, contact AMX Technical Support for help with additional specific control wiring scenarios.

  • Page 8: System Components

    Product Information System Components The components in a complete ViewStat system (including optional accessories) are listed below: System Components Component Name Description ViewStat (VST) Communicating thermostat VST-TTM Temperature support module (optional) VST-TRH Temperature/Humidity support module (optional) VST-TSF Flush-mount remote sensor Indoor flush-mount temperature/relative humidity sensor (optional) VST-TSO Duct/Outdoor remote sensor Duct/Outdoor-mount temperature/relative humidity sensor (optional) VST-DIST...

  • Page 9: Support Module Specifications

    Product Information ViewStat Specifications (Cont.) Circuit Board Components: Communication and HVAC Terminals with captive-wire connectors that connects the Thermostat, HVAC Equipment connectors equipment, control system, remote sensors and power supply. Refer to the Wir- ing the Thermostat section on page 21 for details. DIP Switch 4-position DIP switch that configures the thermostat for various application types (Servant/Master, Electric/Fossil, Single/Multi, Heat Pump/Heat-Cool).

  • Page 10: Maximum Cable Distances

    Product Information The ViewStat supports up to four Support Modules, and can display any one of the following: The remote temperature on support module address 1 if its mode is set to "Control". The average temperatures of all support modules set to "Control" mode. The humidity of the VST-TRH (Temperature and Humidity Module) set to "Control"...

  • Page 11: Hvac System Pre-Installation Check List

    Product Information HVAC System Pre-Installation Check List Before getting started, determine what type of heating system is/will be installed in the house. Then use the following table to determine if the proper numbers of wires are available, depending on the HVAC System type.
  • Page 12 Product Information ViewStat Communicating Thermostat...

  • Page 13: Viewstat Installation And Wiring

    ViewStat Installation and Wiring ViewStat Installation and Wiring This section covers the installation, wiring and checkout of a ViewStat Communicating Thermostat System. 1. 120 volts may cause serious injury from electrical shock. Disconnect electrical power to the HVAC system before starting installation. This system is a low-voltage system. 2.

  • Page 14: With Remote Temperature Sensors

    ViewStat Installation and Wiring With remote temperature sensors Follow the guidelines for placement of the sensors and locate the thermostat indoors where operating range (see specs) will not be violated (i.e. do not install in a cold garage or hot equipment room).

  • Page 15: Setting The Dip Switch

    ViewStat Installation and Wiring Setting the DIP Switch Set the DIP switch located on the thermostat circuit board (FIG. 4) according to the application needs (see the DIP Switch Settings table below for details). FIG. 4 Setting the DIP Switch The following table shows what each switch corresponds to depending on position.

  • Page 16: Attaching The Miniverter To The Viewstat

    ViewStat Installation and Wiring Attaching the MiniVerter to the ViewStat Before attaching the MiniVerter to the rear of the ViewStat, connect the wiring, as described below: 1. Detach the faceplate from the base of the ViewStat. 2. Pull the stripped/tinned wires through the cutout in the center of the base (FIG. 5). Common (black) from 24 VAC HVAC System...

  • Page 17: Wiring The Vst-Tstat To A Vst-Dist Distribution Panel

    ViewStat Installation and Wiring ViewStat base (top view) Insert the MiniVerter (connector-side down) into the guide slots inside the mounting bracket. MiniVerter card Slide the MiniVerter into locking position in MiniVerter the bracket. mounting bracket Snap into place FIG. 6 Inserting the MiniVerter into the mounting bracket (top view). 7.
  • Page 18 ViewStat Installation and Wiring 24VAC Switches A - Allows Transmit Communications B - Allows Received Communications PWR - Turns power to thermostat on/off Communications Wire to Protocol Adapter, LEDs light when other Distribution Panels or communications are directly to Automation System transmitted (A) or received (B) A: Transmit B: Receive...

  • Page 19: Mounting The Base To A Wall

    Loss of internal programs may result from static discharge to thermostat circuit board. Installer must touch a grounded metal object before handling the circuit board. Connecting the ViewStat to AMX Control Systems When a Mini Verter is used the Viewstat has a single RJ-45 jack on the rear panel, and uses ICSNet cabling to connect to NetLinx or Landmark control systems.
  • Page 20 ViewStat Installation and Wiring The wires should be connected in the standard manner described in the following table. If standard EIA/TIA 568A/B color coding is followed, wiring problems will be minimized PHASTLink RJ-45 Pinout Information (EIA/TIA 568 A) Wire Color Polarity Function White/Green...

  • Page 21: Connecting To An Axcess Control System (Via Axc-232++, Axb-Em232, Or Axcent3/Pro)

    ViewStat Installation and Wiring Connecting to an Axcess Control System (via AXC-232++, AXB-EM232, or Axcent3/ PRO) To connect the ViewStat to an Axcess control system via an Axcess Cardframe (cardframe must be equipped with an AXC-232 232/422/485 Control Card), AXB-EM232 Enhanced Master, or Axcent3(PRO) Controller, refer to the card-edge pinout information below: Axcess System Card Edge Pinouts Signal...

  • Page 22: Connecting To An Axcess Master Controller Via The Rs232/422/485 (Db-9) Port

    ViewStat Installation and Wiring Connecting to an Axcess Master Controller via the RS232/422/485 (DB-9) Port The table below lists the connector pins, signal types, and signal functions for RS-232/RS-422/RS- 485 DB-9 (male) connector on an Axcess Master Controller (i.e. Axcent3 or Axcent3/PRO). DB-9 Pinouts Wiring and Baud Configurations Signal...

  • Page 23: Connecting To Netlinx Integrated Controllers Via The Rs232/422/485 (Db-9) Port

    ViewStat Installation and Wiring Connecting to NetLinx Integrated Controllers via the RS232/422/485 (DB-9) Port The table below lists the connector pins, signal types, and signal functions for RS-232/RS-422/RS- 485 DB-9 (male) connector on an NetLinx Integrated Controllers (i.e. NI-2000/3000/4000). DB-9 Pinouts Wiring and Baud Configurations Signal Function...

  • Page 24: Connecting To A Netlinx Master Controller Via Nxc-Com Card

    ViewStat Installation and Wiring Connecting to a NetLinx Master controller via NXC-COM card The Viewstat can connect to a NetLinx NXF Cardframe or NXI equipped with a NXC-COM Dual COM Port Control Card. The following table shows the card edge pinout information for the NXC- COM card.

  • Page 25: Connecting To A Landmark Control System

    ViewStat Installation and Wiring Connecting to a LandMark Control System PhastLink cables are used to connect all PhastLink-compatible devices, including keypads, dimmers, J-box IR devices, amplifiers, audio switches, etc. The table below lists the RJ-45 pinout information. RJ-45 Pinout Information Pin Wire Color Polarity Function White/Green...

  • Page 26: Connecting To A Netlinx Control System

    ViewStat Installation and Wiring Connecting to a NetLinx Control System To connect a single ViewStat to a NetLinx control system, use ICSNet cabling to connect the RJ-45 jack on the ViewStat to any available ICSNet jack on the NetLinx Master. The maximum cabling distance between the ViewStat and Master is 1,000 ft (304.8 m).

  • Page 27: Wiring The Thermostat

    ViewStat Installation and Wiring Wiring the Thermostat 1. Strip 1/4" (0.63 cm) of insulation from each wire to be used. 2. Secure wires into the terminals on the base according to the appropriate wiring diagram, as described in the following table. Refer to the Wiring Diagrams section on page 29. Use color- coding practices (i.e.

  • Page 28: Connecting The Viewstat To The Hvac System

    ViewStat Installation and Wiring Communication and Equipment Terminal Wiring Definitions (Cont.) Equipment Terminal (Cont.) DEH/Y1 1st stage Cooling (non-heat pump) -or- 1st stage Compressor (heat pump) -or- Dehumidification (with humidity control sensor) 2nd stage Heat (non-heat pump) -or- 2nd stage Emergency Heat (heat pump) 2nd stage Cooling (non-heat pump) -or- 2nd stage Compressor (heat pump)
  • Page 29 ViewStat Installation and Wiring MULTI-STAGE FURNACE USE 18-20 GA. THERMOSTAT CABLE. NUMBER OF CONDUCTORS REQUIRED DEPENDS ON THE HVAC SYSTEM BEING CONTROLLED 2ND STAGE COOL STAGE HEAT 1ST STAGE COOL STAGE HEAT RELAY MULTI-STAGE A/C COOL COOL REFER TO THE THERMOSTAT INSTALLATION SHEET FOR CAUTION! INTERNAL SCHEMATIC, THERMOSTAT CHECK-OUT ENSURE HVAC SYSTEM POWER...
  • Page 30 ViewStat Installation and Wiring b. FIG. 15 shows a typical heat/cool wiring schematic: OUTDOOR HEAT PUMP UNIT USE 18-20 GA. THERMOSTAT CABLE. NUMBER VALVE OF CONDUCTORS REQUIRED DEPENDS ON THE HEAT COMP. HVAC SYSTEM BEING CONTROLLED CAUTION! VALVE COMP. COOL ENSURE HVAC SYSTEM POWER IS OFF BEFORE WIRING INDOOR BLOWER/HEAT...

  • Page 31: Checking Hvac System Operation

    ViewStat Installation and Wiring Checking HVAC System Operation Use the thermostat buttons to verify that the thermostat is controlling the equipment operation. A checkout procedure is supplied in the installation instructions supplied with thermostat. This procedure will verify only that the thermostat operates the equipment. The HVAC installer may need to connect 24VAC to the R and C terminals to check HVAC operation.

  • Page 32: Optional Hvac Set-Up Features

    ViewStat Installation and Wiring 4. Use the down arrow button to lower the set point 3°F below room temperature. In 5 to 10 seconds the first stage of cooling begins, and the COOL message icon begins to flash. If there is a second stage it will begin in four minutes.

  • Page 33: Address The Thermostats And Set Highest Address

    ViewStat Installation and Wiring Address the Thermostats and Set Highest Address These steps must be done at each thermostat for communication to work properly. 1. Press the Mode and Enter buttons simultaneously at the thermostat. It may take a couple of tries to get them pressed together.
  • Page 34 ViewStat Installation and Wiring Start with address 1 and increment by 1 for each new address - do not skip an address. This will optimize communications speed. Write down the address for each thermostat. 6. After the address has been selected, press the Enter button to store the address. 7.

  • Page 35: Wiring Diagrams

    ViewStat Installation and Wiring Wiring Diagrams Single-stage furnace and AC configuration. ViewStat Black (power) (common) (from MiniVerter) FIG. 18 Single-stage furnace and AC configuration ViewStat Communicating Thermostat...

  • Page 36: Two-Stage Furnace And Two-Stage Ac Configuration

    ViewStat Installation and Wiring Two-stage furnace and two-stage AC configuration. ViewStat Black (power) (common) (from MiniVerter) FIG. 19 Two-stage furnace and two-stage AC configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat...

  • Page 37: Roof Top Unit (Two-Stage Heat And Two-Stage Cool) Configuration

    ViewStat Installation and Wiring Roof top unit (two-stage heat and two-stage cool) configuration. ViewStat Black (power) (common) (from MiniVerter) FIG. 20 Roof top unit (two-stage heat and two-stage cool) configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer.

  • Page 38: Boiler With Ac (Two Transformers) Configuration

    ViewStat Installation and Wiring Boiler with AC (two transformers) configuration. ViewStat Black (power) (common) (from MiniVerter) FIG. 21 Boiler with AC (two transformers) configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat...

  • Page 39: Single-Stage Heat Pump Configuration

    ViewStat Installation and Wiring Single-stage heat pump configuration ViewStat Black (common) (power) (from MiniVerter) FIG. 22 Single-stage heat pump configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat...

  • Page 40: Two-Stage Heat Pump Configuration

    ViewStat Installation and Wiring Two-stage heat pump configuration. ViewStat Black (common) (power) (from MiniVerter) FIG. 23 Two-stage heat pump configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer. ViewStat Communicating Thermostat...

  • Page 41: First- Stage Radiant Floor Heat, Second-Stage Furnace One Stage Of Cooling Configuration

    ViewStat Installation and Wiring First- stage radiant floor heat, second-stage furnace one stage of cooling configuration. ViewStat Black (common) (power) (from MiniVerter) FIG. 24 First-stage radiant floor heat, second-stage furnace one stage of cooling configuration IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to the common side of the transformer.
  • Page 42 ViewStat Installation and Wiring ViewStat Communicating Thermostat...

  • Page 43: Support Module Installation And Wiring

    Support Module Installation and Wiring Support Module Installation and Wiring Follow the guidelines for placement of the support modules (as described below), and locate the ViewStat indoors where the operating range of the ViewStat (32° - 99°F/0° - 37°C) will not be violated (i.e.
  • Page 44 Support Module Installation and Wiring 4. Remove the circuit board from the base by pulling back the latch that holds it at the bottom center, as shown in FIG. 26: Pull down FIG. 26 Removing the circuit board 5. Use the sub-base as a template to mark the mounting hole locations on the wall. The word "TOP"...

  • Page 45: Multiple Support Module Installation

    Support Module Installation and Wiring DIP switches must be set prior to powering the support module (support module is powered when thermostat is returned to its base). If switches need to be changed after powering the support module, the thermostat must be removed from its base for a minimum of 15 seconds to ensure proper reset of the support module.

  • Page 46: Setting The Support Module Dip Switches

    Support Module Installation and Wiring Setting the Support Module DIP Switches Both the VST-TTM and VST-TRH support modules contain a 6-position DIP switch (FIG. 30) located on the circuit board to set the support modules address, mode (monitor/control), and the temperature sensor source (T1/T2 or Onboard Sensor).

  • Page 47: Dip Switch 4: Humidity Sensor 2 (Vst-Trh Support Module Only)

    Support Module Installation and Wiring Dip switch 4: Temperature Sensor 2 (VST-TTM support module only) Sensor 2 is for an external flush-mount or outdoor/duct temperature sensor for the VST-TTM support module. Determine whether you want the Sensor 2 input to monitor or control temperature. If DIP switch number 4 is in the "off "...

  • Page 48: Applications

    Support Module Installation and Wiring Applications Heat Pump Applications If the support module is being used with a heat pump thermostat with auxiliary heat, the thermostat can be configured to disable the use of auxiliary heat during warm weather and to lock out the compressor when the outdoor temperature is too cold.

  • Page 49: Troubleshooting Remote Sensors

    Support Module Installation and Wiring Mode of Operation Set to "Humidify" The B terminal is continually energized in the "Humidify" mode. When the thermostat calls for humidity, the W1/HUM terminal will energize. If the minimum off time of 2 minutes has not elapsed since the previous call, no terminals will energize until it has.
  • Page 50 Support Module Installation and Wiring ViewStat Communicating Thermostat...

  • Page 51: Set Up And Configuration

    Set Up and Configuration Set Up and Configuration The ViewStat has many features that can be adjusted to customize operations. Temperature Control Set Up, Balance Point Set Up and Communications Set Up, in particular, should only be adjusted with the help of a qualified service technician. When first powered up, the Message Display will scroll through the current mode status, fan status, and Heating/Cooling output status.

  • Page 52: Network Override Set-Up

    Set Up and Configuration The following items are configured in thermostat set-up: Network Override Set-Up This enables or disables the Network Override feature. When Network Override has been invoked the thermostat will only respond to the buttons of the thermostat; commands sent by the automation system are ignored.

  • Page 53: Security Set-Up

    Set Up and Configuration Security Set-Up This prevents unauthorized individuals from accessing Thermostat Set-Up. A code can be setup that must be entered to gain entry into Thermostat Set-Up (FIG. 35). Security Remove Set Up More Password Next Set New Password More Enter Lockout Code...

  • Page 54: Communications Set-Up

    Set Up and Configuration Communications Set-Up This is where the thermostat address is entered. Additionally, the total number of thermostats (or the highest addressed stat on the network) is entered here to optimize communication timing. Consult a qualified service technician before changing any of the values in this Sub-Menu (Sub- Menu not shown).

  • Page 55: Balance Point Set-Up

    Set Up and Configuration Backlight On With Every Set Up More Change Next On Only When Needed More Set, 1=lighter 2-darker toggle between 1 and 2 using the Up and Down buttons Disable More EXIT Back FIG. 37 Backlighting set-up Balance Point Set-Up Balance points limit heat pump operation when the outdoor temperature is too high or too low.
  • Page 56 Set Up and Configuration Display Set-Up Options (Cont.) SHOW DATE AND TIME the message display will, by default, scroll three messages showing the status of the mode, fan and equipment outputs. A fourth, date and time, can also be displayed in the scroll list. Display Temperature Set Up...

  • Page 57: Using The Netlinx Module To Program The Viewstat

    For a detailed description of the NetLinx programming protocol for the ViewStat, refer to the "ViewStat Programming Protocol Reference Manual", available on the AMX.COM web site. When connecting thermostats (thermostat/mini-verter pair), it is best to initialize each mini-verter separately. If all mini-verter devices have the same device number and are on the bus at the same time, an initialization problem can occur where all devices obtain the same new device identification number.
  • Page 58 Using the NetLinx Module to Program the ViewStat It is important that the serial number array be the same length as the device array. If the serial number array happens to be shorter, the length will be set to that of the device array and the new members of the array will be set to the value 1.

  • Page 59: The Viewstat Model

    Using the NetLinx Module to Program the ViewStat The ViewStat Model The model will define a security system as consisting of the following components: 1. System: This refers the controller and all that it controls. 2. Zone: The system will consist of one or more ViewStat zones. A zone is nothing more than an area that can be controlled separate from other areas.
  • Page 60 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command Description Set date. 'T-<tstat> DATE-<val>' Parameters: • <tstat> : id of thermostat/zone • <val> : MMDDYY Example: 'T-1 DATE-030894' Requests current date on thermostat 'T-<tstat> DATE?' Set dehumidify set point.
  • Page 61 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command Description Set heat set point. 'T-<tstat> HEAT-<val>' Parameters: • <tstat> : id of thermostat/zone • <val> : + = increase heat set point by one degree - = decrease heat set point by one degree 38..88 = new heat set point (F) Examples:...
  • Page 62 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command Description Set humidify set point. 'T-<tstat> HUMIDIFY-<val>' Parameters: • <tstat> : id of thermostat/zone • <val>: + = Increase humidify set point by one percent - = Decrease heat set point by one percent 10-90 = humidify point (in percent) Example: 'T-6 HUMIDIFY-30'...
  • Page 63 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command Description When on, displays text as set by the MSG command. 'T-<tstat> MENU-<val>' Parameters: • <tstat> : id of thermostat/zone • <val> : 1 = enables display of 'msg' message 0 = disables display of 'msg' message Gets the current menu state 'T-<tstat>...
  • Page 64 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command Description Query for current inside temperature. 'T-<tstat> TEMP?' Parameter: • <tstat> : id of thermostat/zone Example: 'T-4 TEMP?' Set time. 'T-<tstat> TIME-<val>' Parameters: • <tstat> : id of thermostat/zone •...

  • Page 65: String Feedback

    Using the NetLinx Module to Program the ViewStat String Feedback The NetLinx module will provide feedback to the glue code for ViewStat system changes via string events. Below are the strings supported. Data coming from the module will be in the form of strings.
  • Page 66 Using the NetLinx Module to Program the ViewStat String Feedback (Cont.) String Description Reports current humidify mode. 'T-<tstat> HMODE-<val>' Parameters: • <tstat> : id of thermostat/zone • <val> : OFF = disabled (no humidity control) HUMID = humidify mode DEHUM = dehumidify mode AUTO = automatically controlled based on humidify and dehumidify set points.
  • Page 67 Using the NetLinx Module to Program the ViewStat String Feedback (Cont.) String Description Reports current HVAC mode. 'T-<tstat> MODE-<val>' Parameters: • <tstat> : id of thermostat/zone • <val> : OFF = disabled (no cool, no heat) HEAT = heat mode (no cool) COOL = cool mode (no heat) AUTO = thermostat automatically controls heat and cool based on set points.
  • Page 68 Using the NetLinx Module to Program the ViewStat String Feedback (Cont.) String Description Reports current temperature scale. 'SCALE-<val>' Parameter: • <val> : C = Celsius F = Fahrenheit (default) Example: 'SCALE-F' Displays debug state. 'USEDEBUG-<val>' Parameter: • <data> : 1 = enabled 0 = disabled Reports current version number of the NetLinx module.

  • Page 69: Operating The Thermostat

    Operating the Thermostat Operating the Thermostat This section describes the front panel components, and gives instructions for operating the ViewStat thermostat. FIG. 40 shows the front panel. Front Panel Components Message Display Two types of messages are displayed, Permanent and Temporary Messages. Permanent Messages are those that scroll continually during thermostat operation.

  • Page 70: Adjust Buttons

    Operating the Thermostat Adjust buttons The Adjust buttons adjust the heating and cooling temperature settings. Fan button The fan can be operated continuously ( ) or only when there is a need to heat or cool. FAN ON Enter button The Enter (or Network Override) button is used to override the home automation system, to clear temporary flashing messages on the message display and with the set-up features of the thermostat.

  • Page 71: Operating The Thermostat

    Operating the Thermostat Operating The Thermostat Notes on temperature adjustments: setting must always be a minimum of 2° (F or C) higher than the setting. COOL HEAT The thermostat will automatically maintain the 2° difference. For example, if the Cooling set point is 75°F and one changes the Heating set point to 74°F, the thermostat will automatically change the Cooling set point to 76°F.

  • Page 72: Setting Temperatures

    Operating the Thermostat – Do not set to OFF mode during periods when freezing temperatures could occur. Setting temperatures Press the Up or Down adjust button. The setting to be changed will begin to flash. Press and hold the button to change the setting. If operating in the mode, the only temperature set point available to change is the HEAT...

  • Page 73: In Case Of Power Failure

    Operating the Thermostat In Case Of Power Failure This thermostat does not require a battery. If the power goes out, the screen is blank. During the period the power is off, the heating/cooling system will not operate. When power is restored, the thermostat will return to the previous settings.
  • Page 74 Operating the Thermostat ViewStat Communicating Thermostat...
  • Page 75 Operating the Thermostat ViewStat Communicating Thermostat...
  • Page 76 ATLANTA • BOSTON • CHICAGO • CLEVELAND • DALLAS • DENVER • INDIANAPOLIS • LOS ANGELES • MINNEAPOLIS • PHILADELPHIA • PHOENIX • PORTLAND • SPOKANE • TAMPA 3000 RESEARCH DRIVE, RICHARDSON, TX 75082 USA • 800.222.0193 • 469.624.8000 • 469-624-7153 fax • 800.932.6993 technical support • www.amx.com...

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