AMX ViewStat Operation/Reference Manual
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AMX ViewStat Operation/Reference Manual

AMX ViewStat Operation/Reference Manual

Communicating thermostat
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Operation/Reference Guide
ViewStat

Communicating Thermostat

P r od u c t C a t e g o r y
L as t R e vi s ed: 5 /1 6 /20 0 8

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  • Page 1: Communicating Thermostat

    Operation/Reference Guide ViewStat Communicating Thermostat P r od u c t C a t e g o r y L as t R e vi s ed: 5 /1 6 /20 0 8...
  • 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.

  • Page 3: Table Of Contents

    Wiring the VST-TSTAT to a VST-DIST Distribution Panel ... 11 Mounting the Base to a Wall ... 12 Connecting the ViewStat to AMX Control Systems ... 13 Connecting to an Axcess Control System (via AXC-232++, AXB-EM232, or Axcent3/PRO) ... 14 Connecting to an Axcess Master Controller via the RS232/422/485 (DB-9) Port ...
  • Page 4 Backlighting Set-Up ... 42 Balance Point Set-Up ... 43 Display Set-Up ... 43 Using the NetLinx Module to Program the ViewStat ...45 AMX_ViewStat NetLinx Module - Overview ... 45 The ViewStat Model ... 46 Command Interface - SEND_COMMANDs ... 47 String Feedback...
  • Page 5 Selecting the Mode ... 59 Setting temperatures ... 60 Fan operation... 60 Backlight operation ... 60 Network override... 60 Clearing a temporary flashing message ... 60 In Case Of Power Failure ... 60 Cleaning the Thermostat ... 60 ViewStat Communicating Thermostat Table of Contents...
  • Page 6 Table of Contents ViewStat Communicating Thermostat...

  • Page 7: Product Information

    Product Information Introduction The ViewStat Communicating Thermostat (FIG. 1) operates similarly to a conventional thermostat but has the unique capability of being controlled, either locally or remotely from a NetLinx or Landmark control system. The ViewStat is compatible with any 24-volt controlled HVAC system. This manual describes how the ViewStat connects to several different types (see theViewStat Installation and Wiring section on page 7).

  • 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 ViewStat (VST) VST-TTM VST-TRH VST-TSF Flush-mount remote sensor VST-TSO Duct/Outdoor remote sensor Duct/Outdoor-mount temperature/relative humidity sensor (optional) VST-DIST ViewStat Specifications...

  • Page 9: Support Module Specifications

    This temperature data is sent back to the ViewStat Thermostat, allowing you to accurately control and monitor temperature in a given area or multiple areas.

  • 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.

  • Page 11: Hvac System Pre-Installation Check List

    In addition to the wires necessary to support the HVAC system control, an RJ45- terminated Cat5 cable is necessary to support NetLinx or Landmark communications (see theViewStat Installation and Wiring section on page 7 for details). ViewStat Communicating Thermostat Product Information # of HVAC...
  • Page 12 Product Information ViewStat Communicating Thermostat...

  • Page 13: 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.

  • Page 14: Removing The Faceplate From The Base

    ViewStat Installation and Wiring Removing the Faceplate from the Base No tools are required to disassemble the thermostat – just use your hands to pull the front panel off of the base (FIG. 2). FIG. 2 Pulling the front panel off of the base Loss of internal programs may result from static discharge to thermostat circuit board.

  • Page 15: Setting The Dip Switch

    Reassembly No tools required – line up pins on circuit board with the corresponding terminal blocks. Use your hands to push the front panel securely to the mounted base. ViewStat Communicating Thermostat ViewStat Installation and Wiring Switch Switch Switch Switch...

  • Page 16: Attaching The Miniverter To The Viewstat

    Miniverter FIG. 5 ViewStat base with Communication, Power and Equipment terminals Before mounting the ViewStat, you must attach the MiniVerter to the rear panel of the ViewStat, as described below: Detach the faceplate from the base of the ViewStat.

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

    (reproduced in FIG. 7) gives wiring information for the panel. ViewStat Communicating Thermostat ViewStat Installation and Wiring ViewStat base (top view) Slide the MiniVerter into locking position in the bracket.

  • Page 18: Mounting The Base To A Wall

    ViewStat Installation and Wiring ADDRESS # ADDRESS # ADDRESS # ADDRESS # Transformer 24 V, 40 VA minimum up to 8 thermostats C - 24 V (common) (-) if DC R - 24 V (hot) (+) if DC FIG. 7...

  • Page 19: Connecting The Viewstat To Amx Control Systems

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

    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,...

  • Page 21: Connecting To An Axcess Master Controller Via The Rs232/422/485 (Db-9) Port

    FIG. 9 shows the wiring configuration for Axcess systems (using the DB-9 PROGRAM port). ViewStat (Communication terminal) FIG. 9 Connecting the ViewStat to an Axcess Control System via the RS232/422/485 (DB-9) port ViewStat Communicating Thermostat Wiring and Baud Configurations Function RS-232...

  • Page 22: Connecting To Netlinx Integrated Controllers Via The Rs232/422/485 (Db-9) Port

    FIG. 9 shows the wiring configuration for NetLinx systems (using the DB-9 PROGRAM port). ViewStat (Communication terminal) FIG. 10 Connecting the ViewStat to an NetLinx Integrated Control System via the RS232/422/485 (DB-9) port Wiring and Baud Configurations Function RS-232 RS-422...

  • Page 23: Connecting To A Netlinx Master Controller Via Nxc-Com Card

    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 24: Connecting To A Landmark Control System

    ViewStat and Master is 1,000 ft (304.8 m). To connect multiple ViewStats to a NetLinx system, use a NetLinx Hub (NXC-NH) to add additional ICSNet ports to the system, connect the RJ-45 jack on the ViewStat to an available ICSNet jack on the Hub. Functio...

  • Page 25: Connecting To A Landmark Control System

    ViewStat and MCU is 1,000 ft (304.8 m). To connect multiple ViewStats to a Landmark system, use a Landmark Hub (PLH-RPT) to add additional PhastLink ports to the system, connect the RJ-45 jack on the ViewStat to an available PhastLink jack on the Hub.

  • Page 26: Wiring The Thermostat

    ViewStat Installation and Wiring Wiring the Thermostat Strip 1/4" (0.63 cm) of insulation from each wire to be used. 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 26. Use color-coding practices (i.e.

  • Page 27: Connecting The Viewstat To The Hvac System

    Communication and Equipment Terminal Wiring Definitions (Cont.) Equipment Terminal (Cont.) DEH/Y1 Connecting the ViewStat to the HVAC System A qualified HVAC technician should perform these steps step to ensure proper termination. Make sure the HVAC system power is off. The following figures (FIG. 14, FIG. 15) show wiring diagrams for several different HVAC equipment types.
  • Page 28 ViewStat Installation and Wiring FIG. 15 shows a typical heat/cool wiring schematic: USE 18-20 GA. THERMOSTAT CABLE. NUMBER OF CONDUCTORS REQUIRED DEPENDS ON THE HVAC SYSTEM BEING CONTROLLED CAUTION! ENSURE HVAC SYSTEM POWER IS OFF BEFORE WIRING INDOOR BLOWER/HEAT UNIT STAGE AUX.

  • Page 29: Checking Hvac System Operation

    Minimum On time delays. Press the Mode button until the HEAT message appears, along with the current heat setting in the Main display. ViewStat Communicating Thermostat ViewStat Installation and Wiring Message display Scroll/Set-Up buttons Main (LCD) display Adjust buttons...

  • Page 30: Optional Hvac Set-Up Features

    5 seconds or until any of the three aforementioned buttons are pressed. Thermostat Set Up is a series of sub-menu's that allow you to customize the ViewStat in various ways. The Set Up and Configuration section on page 39 outlines the set up features. The following steps will guide you only through Communications Set Up sub-menu (FIG.
  • Page 31 This number must be set the same at each thermostat. Press Enter to set the baud rate. The ViewStat must be set for 9600 baud to communicate with the miniverter. This is the default setting, and you shouldn’t ever change this setting.

  • Page 32: Wiring Diagrams

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

  • Page 33: Two-Stage Furnace And Two-Stage Ac Configuration

    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 ViewStat Installation and Wiring ViewStat Black (power) (common)

  • Page 34: 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. 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 35: Boiler With Ac (Two Transformers) Configuration

    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 ViewStat Installation and Wiring ViewStat Black (power) (common)

  • Page 36: Single-Stage Heat Pump Configuration

    ViewStat Installation and Wiring Single-stage heat pump configuration 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 Black (common) (power) (from MiniVerter)

  • Page 37: Two-Stage Heat Pump Configuration

    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 ViewStat Installation and Wiring ViewStat Black (common) (power) (from MiniVerter)

  • Page 38: 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. 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 39: 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. do not install in a cold garage or hot equipment room). Refer to the Support Module Specifications section on page 3 for more information on the modules.

  • Page 40: Multiple Support Module Installation

    Connect the wires on the thermostat sub-base to the terminals labeled RSR, RSC, RSB and RSA on the ViewStat base (see FIG. 5 on page 10) and the Communication and Equipment Terminal Wiring Definitions table on page 20). Make sure that each terminal on the support module is wired to the terminal with the same label at the thermostat.

  • Page 41: Setting The Support Module Dip Switches

    ViewStat displays an average of all incoming temperature readings. If all connected support modules are set to monitor mode, then the ViewStat displays the temperature reading from the on-board sensor, and the temperature from the remote sensor (or the average temperature if you’re using multiple sensors) is displayed as the REMOTE temperature.

  • Page 42: Dip Switches 1 And 2: Address (1-4)

    "off" position it will use the remote sensor inputs (T1/T2). If the DIP switch is in the "on" position, it will use the temperature input from the onboard thermistor. This option only exists for the Sensor 1 input and can still be configured to monitor or control. ADDRESS 3 ADDRESS 4 ViewStat Communicating Thermostat...

  • Page 43: Applications

    Make sure all temperature sensors connected to this ViewStat are set to "Monitor". Once the humidity control sensor(s) have been wired to the ViewStat, the thermostat display will change to indicate % RH instead of °F/°C. The thermostat mode selections will also change to reflect humidity control.

  • Page 44: Troubleshooting Remote Sensors

    15 seconds. Thermostat displays RH instead of °F or °F instead of RH: Make sure that monitor/control DIP switches are set correctly. Reset support module after changing any DIP switches by turning off power for approximately 15 seconds. ViewStat Communicating Thermostat...

  • Page 45: 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.

  • Page 46: Network Override Set-Up

    Mode Locked Out Partial Lockout More Unlock Thermostat More EXIT Back MAIN MENU MAIN MENU Set Time Limit min. Set Temp. Limit Allow SetPoint Changes? Timed Time Val Allow Fan Changes? Timed Allow Mode Changes? Timed EXIT Back ViewStat Communicating Thermostat...

  • Page 47: Security Set-Up

    To reset the password to 7777, you must cycle power to the ViewStat. An easy way to cycle power on the ViewStat without having to remove power from the HVAC system is to remove the ViewStat faceplate from the base (see FIG. 2 and FIG. 3 on page 8), then replace it.

  • Page 48: Communications Set-Up

    2nd stage cooling from coming on too soon when 1st stage is acting to control temperature levels or to keep costly auxiliary heat from coming on too soon when the heat pump is sufficient. ViewStat Communicating Thermostat...

  • Page 49: Balance Point Set-Up

    A fourth, date and time, can also be displayed in the scroll list. Display Set-Up Options TEMPERATURE SCALE SHOW TEMPERATURE SET POINTS ALWAYS SHOW TEMPERATURE SET POINTS ONLY IF CHANGED SHOW DATE AND TIME ViewStat Communicating Thermostat On With Every Change Next On Only When Needed More Set, 1=lighter...
  • Page 50 Set Up and Configuration Display Set Up More FIG. 38 Display set-up Temperature Scale °F°C F Show Temp Setpts Always Next Show Setpts Only If Changed More Display Time and Date? EXIT Back ViewStat Communicating Thermostat...

  • Page 51: Using The Netlinx Module To Program The Viewstat

    The ViewStat module is designed to save you the work of manually coding the entire ViewStat command set. By using the module, you’ll save time, and still take full advantage of the ViewStat’s features. While it is strongly recommended that you use the NetLinx module, it is also possible to write your own code "from scratch".

  • Page 52: The Viewstat Model

    System: This refers the controller and all that it controls. 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. Zones have their own temperature settings.

  • Page 53: Command Interface - Send_Commands

    'T-<stat> COOL?' 'T-<tstat> DATE-<val>' 'T-<tstat> DATE?' 'T-<tstat> DEHUMIDIFY-<val>' 'T-<stat> DEHUMIDIFY?' ViewStat Communicating Thermostat Using the NetLinx Module to Program the ViewStat Description Set cool set point. Parameters: • <tstat> : id of thermostat/zone • <val>: + = increase cool set point by one degree...
  • Page 54 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command 'T-<stat> FAN?' 'T-<tstat> FMODE-<val>' 'T-<stat> FMODE?' 'T-<tstat> HEAT-<val>' 'T-<stat> HEAT?' 'T-<tstat> HMODE-<val>' Description Query for current fan state. Parameter: • <tstat> : id of thermostat/zone Example: 'T-2 FAN?' Set fan mode.
  • Page 55 'T-<tstat> HOLD-<val>' 'T-<stat> HOLD?' 'T-<tstat> HUMIDIFY-<val>' 'T-<stat> HUMIDIFY?' 'T-<tstat> HUM?' 'T-<tstat> ID?' ViewStat Communicating Thermostat Using the NetLinx Module to Program the ViewStat Description Query for current humidify mode. Parameter: • <tstat> : id of thermostat/zone Example: 'T-22 HMODE?' Set thermostat hold state.
  • Page 56 Using the NetLinx Module to Program the ViewStat Command Interface - SEND_COMMANDs (Cont.) Command 'T-<tstat> LIGHT-<val>' 'T-<tstat> LOCK-<val>' 'T-<stat> LOCK?' 'T-<tstat> MENU-<val>' 'T-<tstat> MENU?' 'T-<tstat> MODE-<val>' 'T-<stat> MODE?' Description Control backlight on thermostat. Parameters: • <tstat> : id of thermostat/zone •...
  • Page 57 'T-<tstat> TIME-<val>' 'T-<tstat> TIME?' 'T-<tstat> TXT-<line>,<val>' 'T-<tstat> TXT?<line>' ViewStat Communicating Thermostat Using the NetLinx Module to Program the ViewStat Description Displays text on thermostat window when MENU is enabled. Query for current outside humidity. Parameter: • <tstat> : id of thermostat/zone...

  • Page 58: String Feedback

    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. Data going to the module will be in the form of commands.
  • Page 59 'T-<tstat> FMODE-<val>' 'T-<tstat> HEAT-<val>' 'T-<tstat> HMODE-<val>' 'T-<tstat> HOLD-<val>' 'T-<tstat> HUM-<val>' ViewStat Communicating Thermostat Using the NetLinx Module to Program the ViewStat Description Reports current fan state. Parameters: • <tstat> : id of thermostat/zone • <val> : 0 = fan is off...
  • Page 60 Using the NetLinx Module to Program the ViewStat String Feedback (Cont.) String 'T-<tstat> HUMIDIFY-val>' 'T-<stat> ID-<val>' 'T-<tstat> LOCK-<val>' 'T-<stat> MENU-<val>' 'T-<tstat> MODE-<val>' 'T-<tstat> OUTHUM-<val>' 'T-<tstat> OUTTEMP-<val>' 'T-<stat> PMES<num>-<val>' Description Reports current humidify set point. Parameters: <tstat> : id of thermostat/zone <val>...
  • Page 61 'T-<tstat> TEMP-<val>' 'T-<stat> TIME-<val>' 'T-<tstat> TXT-<line>,<val>' 'SCALE-<val>' 'USEDEBUG-<val>' 'VERSION=xx.yy' ViewStat Communicating Thermostat Using the NetLinx Module to Program the ViewStat Description Reports current inside temperature. Parameters: • <tstat> : id of thermostat/zone • <val> : current inside temperature Example: 'T-4 TEMP-76' Reports thermostat time.
  • Page 62 Using the NetLinx Module to Program the ViewStat ViewStat Communicating Thermostat...

  • Page 63: 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 64: Fan Button

    If there is no activity on the system for 15 minutes the icon will be crossed out. This does not mean the thermostat is unable to communicate, only that there has been no communication to this thermostat in 15 minutes. ViewStat Communicating Thermostat...

  • Page 65: Operating The Thermostat

    • AUTO (heat or cool auto-changeover) • EMERGENCY HEAT (EM. HEAT for heat pump equipment only) ViewStat Communicating Thermostat Cool EM. HEAT Select the OFF mode to prevent the heating and cooling equipment from operating. COOL appears on the display and only the cooling equipment will be operated to maintain the temperature at the COOL setting.

  • Page 66: Setting Temperatures

    When using any cleaner be careful not to get any into the interior of the thermostat. Do not spray any liquid directly onto the thermostat. Spray the cleaner onto a soft cloth and wipe the surface of the thermostat. ViewStat Communicating Thermostat...
  • Page 67 Operating the Thermostat ViewStat Communicating Thermostat...
  • Page 68 It’s Your World - Take Control™ 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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