RCS Residential Control Systems Inc.
DO NOT USE THIS PRODUCT FOR BUILDING FREEZE PROTECTION! YOU ARE ADVISED TO INSTALL A MECHANICAL FREEZE PROTECTION DEVICE FOR THIS PURPOSE. TXB16 Operation The TXB16 thermostat provides the latest technology in a full-featured universal thermostat with X10 communications.
TS16 Wall Display Unit The TS16 Wall Display Unit has a LCD display and control buttons for changing the setpoint, system operating mode and manual fan mode. The WDU also has an internal temperature sensor. The display serves as a common display for many functions. It normally shows the current room temperature but switches to show setpoint, mode or other functions when buttons are pushed. Two on-screen indicators show the state of the manual fan and setback mode.
Setpoint Display The displayed setpoint shows the setpoint of the current operating mode (heating or cooling) of the system. If you change modes, the setpoint displayed will change to the new operating mode setpoint. If you set the mode to AUTO mode, the setpoint displayed will be the current operating mode of the system, either heating or cooling. This will change if the operating mode changes automatically. MODE MODE Button The MODE button controls the HVAC system mode.
If you attached a remote temperature sensor to the WDU that is set to remote sensor address “4”, you can view the outside temperature by pressing the UP and DOWN buttons simultaneously. Setup Mode The TXB16 has a new setup mode to allow the user to set the following functions from the WDU: • X10 House Code Address • F/C mode • Sensor Calibration Entering into the setup mode. Enter the setup mode by the following procedure: 1. First press and hold the Mode button 2. Simultaneously press the Fan button. 3.
address 1 is attached it replaces the internal sensor and is becomes the “C1” sensor. See the remote sensor section for more details. When the desired sensor is selected in the setup menu, you can adjust its displayed temperature calibration up or down 7 degrees by pressing the UP/DOWN buttons.
If the WDU detects that a sensor is not responding, it will display “SF”. In most cases this will clear itself when communications is restored to the sensor. A continuous “SF” display may indicate a problem with the wiring or the WDU itself. Check wiring and replace the WDU as needed.
TXB16 HVAC Control Unit The TXB16 HVAC Control Unit works in conjunction with the Wall Display Unit to provide thermostatic control of the HVAC system. In addition, the Control Unit can receive X10 commands for remote control of the setpoints, temperatures and modes of the thermostat. The TXB16 X10 bi-directional protocol also allows the unit to transmit information via the pre-set dim commands. The TXB16 Control Unit connects to the HVAC system the same as, and in place of, a standard thermostat.
Minimum Off Time (MOT). The HVAC Control Unit has a short cycle protection (SCP) delay of 6 minutes after any compressor operation. This delay prevents a subsequent compressor call until the delay times out. This delay is to allow the compressor head pressure to bleed off before starting again. In addition, at the end of every heating or cooling call the MOT is triggered to prevent rapid cycling of the system.
Heat Pump HVAC System Setup Heat Pump Mode Selection. For Heat Pump operation, set SW1-1 to the HP SYS position (ON). Fan Mode Selection. Set the Fan selection, SW1-2, to the STD FAN position (OFF). Change Over Selection. Heat pump systems change from heating to cooling by reversing the direction of Freon flow in the system. This change over is controlled by the CHANGEOVER (CO) output from the Control Unit (sometimes this is referred to as the reversing valve).
X10 OPERATION X10 Power Line Interface The TXB16 Control Unit has an X10 powerline carrier interface that allows X10 commands to be received over the 110 VAC powerline. Commands from remote systems can change the setpoint temperature and mode of the Thermostat. The Control Unit connects to the power line by an external PSC05 (or TW523) X10 Power Line Interface Module. X10 commands received by the Control Unit are decoded to a new setpoint or a new mode and are sent to the WDU to update its display.
The specific X10 commands that the TXB16 Control Unit can receive and how they are decoded into setpoints and modes is defined by a “Decode Table”. The TXB16 includes 3 Unit Code decode tables, B, P, L and the Preset Dim Bi-Directional decode table. See the X10 Protocol manual #150-00200 for further information. Unit Code Decode Tables Unit Code Decode tables us the simple direct X10 commands sent by devices like the X10 mini or maxi controller, most all home automations systems and many security systems.
TXB16 Installation STOP Before proceeding with removing an existing thermostat and installing the TXB16, Read the following important steps. 1. 2. 3. 4. Record existing wiring information on the enclosed wiring form. Perform the TXB16 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 TXB16 in retrofit applications.
TXB16 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.
The TS16 WDU has an addition connector, J2, on the WDU base for connection of an external remote temperature sensor. Follow the wiring diagram with the remote sensor to connect to the WDU.
TXB16 Control Unit Installation Location and Mounting Install the TXB16 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 IMPORTANT! Cut jumper JP2 for systems with separate Cooling and Heating system transformers. Wire RC to Cooling system transformer and RH to heating system transformer.
HVAC System Wiring Diagram 2 - Heat Pump System Wiring IMPORTANT! Do not cut JP2 for Heat Pump Systems. RC and RH are common for Heat Pumps.
Wiring to the X10 Powerline Interface Module The X10 interface on the Control Unit is the RJ11 jack, J2. It is connected to an X10 power line interface module, Model PSC05 (or TW523), by the four (4) wire modular phone cable provided. TXB16 CONTROL UNIT 120V OUTLET X10 PLI MODULE X10 PLI RJ11 J2 JACK 4 WIRE MODULAR CABLE IMPORTANT NOTE: Use the Modular Cable Provided. If you do not, be sure the cable is the correct type. The Cable must be 4 wire (NOT 2), and reversing.
System Checkout It is strongly recommended that you hook-up and run a simple bench test before installing the TXB16. 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 the 12VDC transformer to the Control Unit. 4.
It is recommended that you install the TXB16 and Control Unit and then rerun these quick tests BEFORE you connect the controller to the HVAC system. You will be confident that the TXB16 is working correctly before you attempt to interface to the HVAC system.
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 TXB16, 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 TXB16 Wiring Diagram TXB16 CONTROL UNIT HCFRX REV G +12VDC +V HVAC SYSTEM STD/HP 1 FAN/HT 2 H1 HVAC JP2 SYSTEM C1 Red C2 W1 HT1 White H2/CO G FAN Green FAN J1 GND +V CLOCK C CLK DATA D DATA THERMOSTAT CONNECTOR RC 24VAC RH OFF ON WDU G STATUS CO C/H 3 S4 4 TS16 WALL DISPLAY UNIT GND RC=RH SW1 U1 NOTE: Jumper JP2 is factory installed for common transformer heating and cooling systems (RC=RH).
Note: The default SW1 switch setting is all OFF.
