RCS TZ16 Installation And Operation Manual

RCS Residential Control Systems Inc.

Model TZ16

Z-Wave Communicating Thermostat

with Rev P HVAC Control Unit

INSTALLATION AND OPERATION MANUAL

DCN: 141-00882

Rev 02

5/18/06

Product Part No

This manual applies to the following product revisions or later

TZ16 Thermostat 001-00882-07
TS16 Wall Display Unit 001-00910-12
HFRP HVAC Control Unit 001-01430-03
ZWBT-485 Z-Wave Thermostat Adapter 001-01030-06

*** IMPORTANT NOTICE ***

DO NOT USE THIS PRODUCT FOR BUILDING FREEZE PROTECTION! YOU ARE ADVISED TO

INSTALL A MECHANICAL FREEZE PROTECTION DEVICE FOR THIS PURPOSE.

TZ16 Operation

The TZ16 thermostat provides the latest technology in a full-featured universal thermostat with serial
communications. The TZ16 has many new features including:

• Separate Heating and Cooling setpoints

• Multistage HVAC systems support

• Wall Display Unit setting of

o Network Address
o F/C temperature display mode
o Sensor calibration (internal and remotes)

• Automatic Remote Sensor detection

• Supports the latest Z-Wave thermostat protocol

The TZ16 thermostat consists of three parts, a Wall Display Unit (WDU), the HVAC Control Unit and the
ZWBT Z-Wave Thermostat adapter. The Wall Display Unit provides users functions like a traditional

thermostat and connects to the Control Unit by a 4 wire cable. The Control Unit connects at the HVAC
system using the standard thermostat connections and provides the thermostatic temperature control of
the system. The ZWBT provides connection to the Z-Wave network.

The TZ16 maintains separate heating and cooling setpoints. The display shows the setpoint of the current
operating mode (in Auto mode, the system keeps track of the current operating mode of the last call, either
heating or cooling).

In addition to the universal Standard or Heat Pump HVAC systems support, the TZ16 has multistage
heating/cooling system outputs. The control unit can support 2 stages of heating and cooling for Standard
systems. It supports 3 stages of heating and 2 stages of cooling for Heat Pump systems.

The TZ16 has a convenient setup mode from the Wall Display Unit. You can set the network address, F or
C display mode and easily calibrate the internal and all attached remote sensors.

The TZ16 has automatic detection and setup of remote temperature sensors. Remote sensors have
address settings that, when detected by the TZ16, will be used for specific functions, such as, in lieu of the
internal sensor or averaging with internal or remote other sensors.

The TZ16 can be used with system controllers that support the Z-Wave thermostat protocol.

TZ16 Thermostat Block Diagram

Wall Display Unit

TZ16 Thermostat

4 Wires

HVAC Control Unit

4 Wires

Z-Wave
Adapter

4-8 Wires depending on the HVAC system.

*NOTE: Must have both 24VAC Common and
24VAC Return power connections to the HVAC
system.

HVAC System

Thermostat
Connections

24C*
24R*
W1
W2
G
Y1
Y2

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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.

Any changes, such as the temperature or control button operations at the WDU are sent to the HVAC
Control Unit. In turn, the Control unit sends changes in setpoint or modes from the serial communications
network to the WDU. When updates are received by the WDU, they are displayed on the LCD display for 3
seconds and then the display returns to the current room temperature.

LCD DISPLAY

Shows current temp normally.

Shows setpoint or mode

when buttons pushed.

Setback Mode On Indicator

Setpoint Increase Button

Setpoint Decrease Button

TS16 WDU

.7.5

MODE

FAN

Manual Fan On Indicator

System Mode Button
Manual Fan Button

LCD Display

The LCD display is a two digit multifunction display that normally shows the current room temperature. It
has a continuous backlight for easy viewing anytime. Whenever any of the control buttons are pushed, the
LCD display will change to show that function’s current status. The LCD display will stay in the new display
mode as long as buttons are being pushed. After 3 seconds of no activity, the display will change back to
show current temperature.

The right decimal point on the LCD display will turn on whenever manual fan is ON. The left decimal point
will flash whenever the setback mode is ON.

Remote changes in setpoint or modes that are received by the WDU from the Control Unit will cause the
LCD display to switch and display the updated data for 3 seconds and then return to room temperature.

Temperature Display

The WDU will normally display the room temperature from the internal digital temperature sensor or a
remote sensor if attached.

The WDU will display temperatures from -9°F/C to 127°F/C. Temperatures less than 0° will be displayed
down to -9 ° as negative numbers. Temperatures below –9 will also be displayed but no minus sign can be
displayed. Temps over 100° will be displayed without the leading 1 (ex: 102 will be displayed as 02°.)

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Control Buttons

The UP and DOWN buttons control the heating or cooling setpoint temperature.
TO VIEW THE CURRENT SETPOINT: Push either the UP or DOWN buttons once will cause the LCD

display to change to show the current setpoint temperature (but won’t change it).
TO CHANGE THE SETPOINT: With the setpoint displayed as above, push the UP button to increase the

setpoint temperature by one degree or push the DOWN button to decrease the setpoint by one degree.
Pushing and holding a button down will cause the setpoint to continuously ramp up/down until the button is
released. After 3 seconds of no activity, the LCD display will change back to show the current room
temperature and the new setpoint value will be sent to the Control Unit.

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

The MODE button sets the HVAC system Heating or Cooling mode.
TO VIEW THE CURRENT MODE: Push the MODE button once and the LCD display will change to show

the current mode.
TO CHANGE THE MODE: While the mode is being displayed, pushing the MODE button again will go to

the next mode. The system mode cycles from Off to Heat to Cool to Auto and back to Off again with
each push of the MODE button. Once you stop pushing the button (for 3 seconds) the new mode will take
affect and the display will change back to room temperature.

When Heat Pump HVAC system type is selected on the Control Unit dipswitch, an additional system mode
of “EH”, or Emergency Heat, is included in the TS16 mode selections. EH is used when Heat Pump
compressor failure requires the use of Auxiliary Heat (heat strips) for primary heating. When EH mode is
selected, the display will alternate between current temperature and “EH” to remind you that the EH mode
has been selected.

FAN

The FAN button controls the HVAC system’s manual fan mode. Pushing the FAN button once will turn the
fan ON and pushing it again will turn the fan to the AUTO mode (which is OFF unless the fan is
automatically turned ON by the heating or cooling operation ). The decimal point in the middle of the two
digits on the LCD display will come on when the manual fan is ON. Changes in the fan mode will be sent to
the HVAC Control Unit.

MODE Button

FAN Button

Setpoint UP and DOWN Buttons

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Setup Mode

The TZ16 has a setup mode to allow the user to set the following functions from the WDU:

• Network Address (NOTE: Must be set to “1” for use with the Z-Wave thermostat adapter.)

• 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. The display will change to show “SU”.

4. Release all buttons.

5. The display will change to show the setup menu, starting with “Ad” (address)

6. Select what setup function you want to change or view by pressing the Mode button to cycle
through the menu options:

“Ad” Serial Network address
“FC” Fahrenheit or Celsius mode
“C1” Calibrate Internal Sensor (or Remote Sensor address 1 if attached)
and if additional external sensors are attached they will appear also:

“C2” (if Remote Sensor address 2 attached)

Setting the Address

When you first enter the setup mode, the first menu selection displayed on the LCD display is “Ad”.
This is default set to “1”. DO NOT CHANGE THIS. The Z-Wave thermostat adapter requires the HVAC
controller to be set to address 1.

Setting the Fahrenheit or Celsius mode

In the setup mode, press the mode button to select “FC” mode. Press the UP/DOWN buttons to select F
or C mode desired. To exit press mode again to move another setup mode or wait for the screen to time
out and return to thermostat mode.

Setting the Sensor Calibration

In the setup mode, press the mode button to display the sensor calibration address, “C1”, to be calibrated.
”C1” is the internal sensor and normally that is all that will be available to calibrate unless external remote
sensors are attached. These will show up as “C2”, and “C3” in the menu selection, if present. With the
desired sensor address displayed, press the UP/DOWN buttons to change the sensor calibration to the
desired temperature. See calibration explanation below.

Exit setup mode

When you are done making changes and no button is pressed for 3 seconds, the display will automatically
exit setup mode and return to the thermostat mode and current temperature display.

Temperature Display Calibration

The TS16 WDU has the capability for the user to adjust the temperature display calibration of the internal
sensor as well as all attached remote sensors from the WDU in the setup mode.

Normally the TS16, with no attached remote sensors, will only show the internal sensor as “C1” in the
calibration setup menu. The TS16 can have additional remote sensors attached. These are addressed as
remote sensors 1 to 4. If they are detected by the TS16, they will show up in the calibration menu as
additional sensors to calibrate as C2. Note that if remote sensor with 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.

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The calibration menu selections are:
C1 = calibrate internal sensor or remote sensor address 1 if attached
C2 = calibrate remote sensor address 2 (only shows up in menu if attached)

Remote Sensors

The TS16 Wall Display Unit has a remote sensor terminal block, J2, on the base for connection of a
remote temperature sensor. Remote sensors have an address that can be set to 1, 2, or 4. Without any
remote sensor attached, the WDU uses the internal sensor for the current temperature information. When
a remote sensor is attached, the WDU will detect it automatically and will use the remote sensor(s)
according to its address selection. Modes of operation are as follows:

Address 1: Use this remote sensor instead of the internal sensor. (becomes C1 in the calibration setup).
Address 2: Average remote sensor 2 with internal sensor or sensor address 1 if attached. (C2)
Address 3: Not used on TS16 wall display units
Address 4: Not used on TS16 wall display units

Table of Remote Sensor Functions and Sensor Addresses

Function Remote Addr 1 Remote Addr 2 Remote Addr 3 Remote Adrr 4

Use internal sensor only No Yes Not used Not used
Used as remote sensor only Yes No Not used Not used
Average internal and one remote No Yes Not used Not used
Average two remotes (only 2) Optional with A2 Yes with A1 Not used Not used

When averaging sensors are used, the average temperature is displayed on the WDU and reported to the
HVAC control unit. You cannot view an individual remote averaging sensor temperatures as the main
thermostat display or report individual sensor temperatures on the communication port. However, you can
check the individual sensor temperatures by going to the calibration setup menu and selecting the sensor
address. You can view the outside temperature by pressing both the UP/DOWN buttons simultaneously.

“CF” or “SF” Error Displays

If the WDU is not properly wired or if communications to the Control Unit is interrupted, the LCD display will
display “CF” to denote Communication Failure. Momentary display of “CF” caused by bad or lost data, will
clear automatically when data communication is restored.

If the “CF” continues to be displayed, check wiring for problems. A continuous “CF” display may indicate a
problem with the Control Unit or the WDU itself.

An “SF” display indicates a temperature sensor failure. If this is displayed continuously, the sensor is failing
to respond and must be replaced. This can also be displayed when attempting to view the outside
temperature if this sensor has failed or been disconnected.

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