RCS Model TZ40 Communicating Thermostat with ZWave Communications Installation and Operation Manual Rev P HVAC Control Unit DCN: 141-00885 Revision 16 Date: 1/26/06 This manual applies to these TZ40 Revisions or later Model Rev Part Number Firmware Version TZ40 Thermostat TS40 Wall Display Unit P D 001-00885 001-01060-26 3.07.4 HFR HVAC Control Unit P 001-01430-01 3.05.
TZ40 OPERATION The TZ40 Thermostat provides typical thermostat functions as well as the capability to send and receive information via ZWave communications. This communications capability allows the thermostat’s setpoint, mode and fan operation to be changed or monitored remotely. The thermostat consists of three parts, a Wall Display Unit (WDU), a HVAC Control Unit and the ZWB ZWave Adapter. The Wall Display Unit looks like a traditional thermostat and is the wall mounted user interface for the TZ40.
OPERATION Wall display Unit Control Buttons All 6 buttons on the TS40 Wall Display Unit are “Soft Keys” meaning that they change functions when you change screens. The function of the buttons is defined by “on-screen labels” that are dynamic and change when you change screens. The following are definitions for the buttons for the main “Thermostat screen” and their primary mode of operation. Other screens and their button operations are defined in following sections.
Thermostat Control Screen 10:25 1 2 3 4 Sys Off Economy Run No Msg MENU Outside 60 75 MODE FAN 76 H 74 C RUN The thermostat control screen is the default display screen and is the screen that is normally displayed on the Wall Display Unit. It can be set to switch to a minimized screen of only room temperature after a few seconds of display. The User Settings menu allows selecting the screen timeout for a minimized screen. Pressing ANY button will bring this screen back from a minimized screen.
Thermostat Control Screen Thermostat Control Screen Buttons Thermostat Control Screen - UP and DOWN Buttons The UP and DOWN buttons adjust the setpoint temperature. Pressing the UP button will increment the setpoint value by one degree and conversely, pressing the Down button will decrement the setpoint one degree. Pressing and holding a button down will cause the setpoint to continuously change until the button is released.
Thermostat Control Screen Mode Button Continued Cool Mode: Only cooling will occur. Auto Mode: Heating or cooling will come on according to the heating and cooling setpoints. The system will automatically switch between heating and cooling when the temperature exceeds the appropriate setpoints. EH Mode: Only displayed when Heat Pump HVAC System type is selected.
Thermostat Control Screen Thermostat Control Screen - LED Displays The Thermostat Control Screen has the following LED labels and descriptions, numbered from top to bottom, 1-4. o LED 1 Green: System Operation display.
Main Menu Screen The Thermostat has a menu tree that can be accessed by pressing the “Menu” button on the Main Thermostat screen. Various configurations of the TS40 can have different screen contents. The first screen that will come up is the Main Menu screen. This is a list of the other menus or functions that can be accessed. Standard screens are listed below. Yours may vary with different configuration or revisions.
Main Menu > Messages The TS40 Message Screen allows you to retrieve text messages sent from the serial network to the thermostat. The message screen features navigation buttons to read new and old messages and delete them. Up to 16 messages can be stored in the thermostat, if more than 16 messages are received, the oldest is erased to make room for the newest message. New messages will turn on and flash the Message LED and Mail Icon in the main thermostat screen.
Main Menu > Schedules The Schedules Screen allows you to review and set the setback schedule for the thermostat. The TZ40 has a 4 x 7 schedule. Four times a day can be selected for Heating and Cooling setpoints. Each day of the week can have a different schedule. Groups of days can be copied with the same schedule. When the TZ40 is set to “Run” mode, the schedule will be executed daily, with the setpoints being changed as per that days schedule stored in the thermostat.
Main Menu > Schedules > Heat and Cool Schedule Screen When you select the Heat and Cool Schedule menu item, the Schedule programming screen opens and the schedule for current day will be displayed. Use the scroll buttons to highlight the data to be modified. Once the data has been highlighted, use the +/- buttons to change the value of the data. To copy a days schedule to another or group of days, move the cursor to “c” on the bottom right of the schedule screen.
Main Menu > Schedules > Heat and Cool > Copy Schedule The Copy Schedule screen is a sub screen of the Schedule screen. The Copy Schedule screen allows you to copy a day’s schedule to another day or group of days. First select the day to be copied in the Schedule screen. Scroll to the “c” at the bottom of the Schedule screen to highlight it. The “Next” button will change to the “Copy” button. Press the “Copy” button to open the Copy Schedule screen.
Main Menu > User Settings The User Settings screen allows you to set or change various user options of the thermostat such as the clock, Minimized Screen timeout, Fahrenheit/Celsius mode, sensor calibrations, and backlight settings. Menu options: • Set Clock Select this menu item to go to the Clock setting screen. • Screen Timeout Select the Screen Timeout time in seconds. Options are 0 or 15 to 127 (default set to 30 seconds).
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Main Menu > User Settings > Set Clock The Set Clock screen allows you to set the Thermostat internal clock. To set the Time and Day, move the cursor with the navigation arrows until the data you want to change is highlighted. Using the + and – arrows to increment or decrement the data to the desired setting. When finished, press the SET button to return to the Main Menu screen or wait for screen to timeout.
Main Menu > User Settings > Sensor Calibration The Sensor Calibration screen allows you to change the temperature calibration for the internal and any external remote temperature sensors attached to the TZ40 WDU. You can change the temperature calibration by +/- 7 degrees. When the Sensor Calibration screen is selected it will show the internal and all detected remote sensors.
Main Menu>User Settings>Backlite/Display The Backlite/Display screen allows you to set the Backlite ON and OFF brightness levels and contrast. Backlite Timeout. Sets the time from last button press that the backlite will timeout and turn off. Adjustable from 0 or 20 to 45 seconds. If set to “0”, the backlite will never timeout and will always be ON. If set in the range of 20 to 45 seconds, the backlite will turn OFF after the selected time expires. ON Level. Sets the brightness of the backlite when ON.
Main Menu > Thermostat Info The Thermostat Info screen displays the current configuration of the Thermostat Wall Display Unit and the HVAC Control Unit. This information is useful for quick check of firmware versions and HVAC system setup. It also shows the network address setting. Thermostat information displayed is: • • • • • • Wall Display Unit Type and Firmware version number. Control Unit Type and Firmware version number.
Main Menu > Installer Settings (Hidden Screen) The Installer Settings screen is a hidden screen designed for installer use only. Do not change any settings in this screen unless you are a qualified service technician. Changing these settings will affect the operation of the heating/cooling system. To enter this screen, go to the main menu selection screen and press and hold the two inner buttons for 3 seconds until the Installer Settings screen appears.
Heat Delta Stage 1 ON Range 1 to 8 degrees Default: 1 Sets the delta from setpoint that stage 1 heating starts. Stage 1 turns off at setpoint. Heat Delta Stage 2 ON Range from 1 to 8 degrees Default: 3 Sets the delta from setpoint that stage 2 heating starts. Stage 2 turns off at setpoint. Heating Delta Stage 3 ON Range from 1 to 8 degrees Default: 5 Sets the delta from setpoint that stage 3 heating starts. Stage 3 turns off at setpoint.
Installer Settings Screen Installer Settings Display Lock Service Mode Network Addr Autosend + Done N 1 N Select Screen navigation buttons: Done + Return to Main Menu screen Move menu selection pointer up Increase by 1 or change from Y to N Decrease by 1 or change from Y to N Select Select menu item to go to a submenu DCN: 141-00885-16 1/26/06 TZ40 Thermostat Manual 21 Move menu selection pointer down
TZ40 Installation STOP Before proceeding with removing an existing thermostat and installing the TZ40, Read the following important steps. 1. 2. 3. 4. Record existing wiring information on the enclosed wiring form. Perform the TZ40 bench test Check WDU wiring BEFORE applying power to control unit. Be sure to install a freeze protection device as required. Installation Overview Standard thermostat wiring vs TZ40 in retrofit applications.
TZ40 Wall Display Unit Installation WDU Location. Choose a location that best represents the temperature of the area to be controlled. Avoid locations that are subject to drafts, from doors and windows, or areas with direct sunlight exposure. WDU Mounting Route the wires to the WDU through the access hole in the back of the case. Mount the WDU to the wall with the screws and anchors provided.
TZ40 Control Unit Installation Location and Mounting Install the TZ40 Control Unit in a protected, convenient, INDOOR location near the HVAC system or in a service accessible area such as an equipment closet or garage. Mount the Control Unit in a vertical position on a wall or sturdy structural member. The unit may be mounted on the HVAC system but care should be taken to avoid the hot burner section or high vibration areas.
HVAC System Wiring Diagram 1 - Standard Gas or Electric System Wiring TZ40 Control Unit FUSE IMPORTANT! For typical central heating/cooling systems, leave jumper JP1 installed. If you have separate Heating and Cooling system transformers, CUT JUMPER JP1. Wire RC to the Cooling system transformer and RH to the Heating system transformer.
HVAC System Wiring Diagram 2 - Heat Pump System Wiring TZ40 Control Unit FUSE SW1 STD 1 S2 2 IMPORTANT! Do not cut JP1 for Heat Pump Systems. RC and RH are common for Heat Pumps.
TZ40 Power Connection The TZ40 Control Unit requires 24VAC power from the HVAC system it is controlling. Connect the 24VAC Common (Blue wire/terminal) and 24VAC R (Red wire/terminal) from the HVAC system to the control unit’s HVAC System terminal block J4’s 24VCom and 24V RH or 24V RC terminals (the RH and RC terminals are default jumpered together…see below) Common or Split Transformer Systems Most HVAC systems have a common heating and cooling transformer.
TZ40 ZWave Adapter The TZ40 comes with an external ZWave adapter (ZWB) that connects to the TZ40 RS485 port. The RS485 port is dedicated to the ZWave adapter and cannot be used for other communications. NOTE: DO NOT CHANGE THE DEFAULT RS485 ADDRESS OF THE THERMOSTAT (SET TO 1). The TZ40 supports the standard ZWave protocol for thermostats. Connect the adapter as shown and proceed with enrolling the device into your ZWave network. ZWB ZWave Thermostat Adapter Wiring 1.
System Checkout It is strongly recommended that you hook-up and run a simple bench test before installing the TZ40. Not only will this save you time in system checkout but will also familiarize you with the thermostat’s operation. THERMOSTAT BENCH TEST 1. Connect the Wall Display Unit to the Control Unit with a short (12-24 inch) 4 wire cable. 2. Before power up, set the Control Unit dipswitch, SW1, to ALL OFF 3. Connect power to the Control Unit. 4. Verify Control Unit Status LED is blinking. 5.
HVAC System Testing If you have difficulty with the HVAC system operation, you can perform the following test to verify the HVAC system is operational. Thermostats, like the TZ40, are just switches to the HVAC system as shown in the diagram below. This is a simplified example of a thermostat and a standard HVAC wiring diagram. The HVAC system operation can be tested by duplicating the thermostat switch operation by shorting across the thermostat terminals on the HVAC system.
RCS TZ40 Wiring Diagram TZ40 CONTROL UNIT SW1 TS40 WALL DISPLAY UNIT WDU GND G +12VDC +V GND C DATA D D 24V COM Blue 24V RH HEAT1 HEAT2 CO RS485 GND J2 D+ FAN 24V RC W1 W2 / O* COMP1 DCOMP2 Program HVAC SYSTEM JP1 STATUS C RH=RC Cut Jumper to split J1 12V CLOCK ZWBT-485 ZWave Thermostat Adapter Fuse Mini ATO 2 Amp STD 1 HP S2 2 OFF ON RX/D TX/D + GND +12V THERMOSTAT CONNECTOR C - 24VAC Common Red R - 24VAC Return White W1 – Heat Stage 1 Orange W2/O* – Heat Stage2 G G
