RCS Model TR40 Thermostat with Serial RS232/485 Communications Installation and Operation Manual PN: 141-01070 Revision 03 Date: 5/22/03 Applies to these TR40 Revisions or later Model Part Number Firmware Version TR40-232 001-01070-07 TR40-485 001-01080-07 TS40 WDU 001-01060-07 3.05.5 HFR-232 CU 001-00810-07 3.04.3 HFR-485 CU 001-00820-07 3.04.
Residential Control Systems Inc.
OPERATION The TR40 Thermostat provides typical thermostat functions as well as the capability to send and receive information via serial communications. This communications capability allows the thermostat’s setpoint, mode and fan operation to be changed remotely. In addition, the remote systems can request status of the thermostat’s temperature, setpoints, modes, and other system information. The thermostat consists of two parts, a Wall Display Unit (WDU) and a HVAC Control Unit.
The TR40’s LCD features a backlit display for low light and night visibility. It can be set to remain on constant or to turn out after a 20-45 second delay .
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.
Main Thermostat 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 main thermostat screen is the default display screen and is the screen that is normally displayed on the Wall Display Unit. It will revert to a minimized screen after 30 seconds of display. Temperature Display The WDU will normally display the current temperature from the internal digital temperature sensor or a remote sensor. The sensors have an accuracy of +/- 1°F(+/- .5°C).
Pushing the UP button will increment the setpoint value by one degree and conversely, pushing the Down button will decrement the setpoint one degree. Pushing and holding a button down will cause the setpoint to continuously change until the button is released. Main Thermostat Screen The setpoint can be set from 40°F to 99°F ( 5°C to 37°C), unless limited in the Installer Settings.
raising the heating setpoint above the cooling setpoint. Again the thermostat will “push” the cooling setpoint up to maintain the 3 degree separation. EH Mode: Only available when Heat Pump HVAC System type is selected. When there is a compressor failure with the heat pump system, setting the mode to EH will allow the supplemental heat to come on whenever there is a heat call to provide heating. It also disables the compressor outputs to prevent further damage to the system.
o LED On, “Vent” displayed > fresh air venting is active o LED 3 Green: Run/Hold display. Shows state of Schedule Run/Hold Mode. o LED Off, “Run” displayed > Schedule is running o LED On, “Hold” displayed > Schedule is off, temperature setpoint hold in effect. o LED 4 RED: Alert LED.
Main Menu Screen The TR40 Thermostat has a menu tree that can be accessed by pressing the “Menu” button on the Main Thermostat screen. Various configurations of the TR40 can have different screen contents. The first screen that will come up is the Main Menu screen that list the other menus or functions that can be accessed. Standard screens are listed below. Message Screen This is a text messaging subsystem that allows message of up to 80 characters to be sent to the thermostat.
Main Menu > Messages The TR40 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 TR40 has 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 TR40 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, timeouts, Fahrenheit/Celsius mode or sensor calibration. Menu options: • Set Clock Select this menu item to go to the Clock setting screen. • Screen Timeout This sets the time before the current screen times out and returns to the minimized screen. If the time is set to 0, the current screen will not time out and will stay displayed until another screen is selected.
Main Menu > User Settings > Set Clock The Set Clock screen allows you to set the system 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.
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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 TR40 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.
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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 qualified service personnel. 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.
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Installer Settings Screen Installer Settings Network Addr Service Mode Min Run Time Min Off Time Done 1 N 1 1 + Thermostat Setup screen navigation buttons: Done + Return to Main Menu screen Increase setting by 1 or change from Y to N Decrease setting by 1 or change from Y to N Scroll Up Scroll Down DCN: 141-01070-03 TR40 Thermostat Manual 23
Installation 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.
TR40 CONTROL UNIT STANDARD HEATING/COOLING HVAC SYSTEMS OPERATION In the HEAT mode, the heating system will be turned on at one deg below the setpoint and will turn off at the setpoint. In the COOL mode, the cooling system will be turned on at one deg above the setpoint and will turn off at the setpoint. In the AUTO mode, the current heating or cooling operating mode will operate as usual with the one deg setpoint control.
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Control Unit Installation LOCATION AND MOUNTING Install the 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.
Control Unit Installation HVAC Unit Connection: Electrically, the Control Unit looks like a standard thermostat to your HVAC system. All connections to the HVAC systems are made at the normal thermostat connection on the HVAC unit. Refer to the following HVAC wiring information for the type of HVAC system, Standard or Heat Pump, that the TR40 is being connected to. Refer to your HVAC system’s documentation for specific information on its thermostat connections.
Control Unit Installation POWER The TR40 is supplied with a 12VDC 500mA wall mount transformer. SYSTEM CHECKOUT It is strongly recommended that you hook-up and run a simple bench test before installing this controller. Not only will this save you time in system checkout but will also familiarize you with the TR40 operation. QUICK TEST NOTE: Before power up, set the control unit dipswitch, SW1, to ALL OFF. 1. Connect a Wall Display Unit to the Control Unit with a short (2 foot) 4 wire cable. 2.
HVAC SYSTEM QUICK TEST The TR40 Control Unit connects to the HVAC system at the normal thermostat connections on the HVAC unit. Standard thermostat control of HVAC systems consist of contact closures in the thermostat. You can verify that your HVAC system is working correctly by duplicating these contact closures by shorting across the proper terminals on the HVAC system. Refer to the following HVAC system example. HVAC SYSTEM EXAMPLE This is a simplified diagram of an HVAC System and Thermostat.
RCS TR40 THERMOSTAT WIRING DIAGRAM NOTE: Jumper JP2 is factory installed for normal HVAC systems with a common heating and cooling transformer. Cut jumper JP2 for separate transformer systems with both RC and RH wires.
