TemperZone TZT-100 User guide

Installer Manual
TZT-100 Multi-function Thermostat
Ver 1

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This document it not typically left with the user as it contains information on setting
values which, if not correctly set may damage the heating, cooling or air conditioning
system or seriously affect its performance or energy consumption.
Great effort has been taken to making the TZT-100 thermostat system intuitive, reliable
and easy to install. Using a common sense approach to the installation will ensure this
product is installed easily and to the customer’s satisfaction. Please read and
understand this instruction manual so that installation, testing and commissioning
process is undertaken in an efficient and effective manner.
This manual is to be used in conjunction with the TZT-100 “User Manual”.
Throughout this manual and any associated documentation, references to “temperzone” relate to
“Temperzone Ltd.” in New Zealand, and “Temperzone Australia Pty. Ltd.” in Australia.
Care has been taken in the preparation of this manual. However temperzone takes no responsibility for errors or omissions in
this document. It is the user’s responsibility to ensure this thermostat and the equipment connected to it, is operating to their
specifications, and in a safe manner.
Due to ongoing product improvement Smart Temp Australia Pty. Ltd., Temperzone Ltd. and Temperzone Australia Pty. Ltd.
reserve the right to change the specifications of the TZT-100 thermostat (or its components) without notice.
All rights reserved. © temperzone P/L 2010
Intellectual rights apply.

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Table of Contents
Installation...................................................................................................................4
Mounting the wall controller....................................................................................................5
Setting the hardware switches .................................................................................................6
TT Terminal Functions ..................................................................................................9
Outside Air Sensor wiring........................................................................................................10
Remote Air Temperature sensor wiring.................................................................................10
Averaging Temperature sensors.............................................................................................11
Remote ON / OFF function......................................................................................................11
Using the “Occupancy Mode ..................................................................................................11
Supply Air Temperature Monitoring ......................................................................................12
Typical Drawings ........................................................................................................12
Attaching the thermostat...........................................................................................17
Advanced Installer Settings ........................................................................................18
Commissioning...........................................................................................................31
Using Remote Temperature Sensors...........................................................................34
Advanced Functions ...................................................................................................35
Specifications.............................................................................................................40
Sensor Resistance v Temperature Table ..............................................................................40
Troubleshooting.........................................................................................................41

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Installation
As with any air conditioning project undertaken, careful installation is the key to a
successful outcome. Time taken during this installation process will be rewarded with a
happy customer and fewer call-backs.
The steps required to install the TZT-100 thermostat are -
1. Read and understand this manual and the User manual.
2. Mount the TZT-100 back plate in a suitable location.
3. Set the 8 DIP switches to match the need of the project / user.
4. Wire the optional remote temperature sensor(s) or switches if required.
5. Power up the air conditioning system.
6. Set the installer software options (if required).
7. Program and set up the TZT-100 thermostat.
(The User Manual will assist with this).
8. Test the heating, cooling and other functions –Commissioning.
For convenience the layout of this manual is in the same order as the steps listed above.

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Mounting the TZT-100 thermostat.
The TZT-100 can only be as accurate as the onboard temperature sensor, or its optional
remote temperature sensor(s) permit. It is therefore essential that the TZT-100 be
installed in a location that is typical of the ambient room temperature. Do not install
the thermostat in a draft, near a floor, behind doors or on a non-insulated external wall.
Also avoid placing the thermostat in areas where the air movement is limited, affected
by direct sunlight or other areas not “typical” of the temperature of the room.
Further, when mounting the TZT-100 be aware that drafts
may travel down the inside of cavity walls, (especially if
mounted on external walls) and enter the back of
the thermostat or sensor enclosure through the
cable entry holes in the wall. It is important to fully
seal these holes to prevent any drafts affecting the
internally mounted temperature sensor. It is
recommended to mount the TZT-100 or remote sensors between
1.5 & 1.7 metres from the floor where possible.
Move the control wires through the large opening in the thermostat base plate then
place the thermostat base on the wall and using appropriate screws, firmly attach the
thermostat base to the wall. Block any holes where cables enter the back of the
thermostat to prevent drafts entering through these holes affecting the sensor.

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Setting the hardware switches
Switch
Off
On
Sw1 –Fan Speeds
1 Speed Fan
3 Speed Fan
Sw2 –Equipment Type
Heat Cool
Heat Pump (O/B terminals)
Sw3 –Stages
1 Stage
2 Stages
Sw4 –Reversing Valve
If Sw 2= ON –Heat Pump
Energise in cool (O)
Energise in heat (B)
Sw4 –Fan Mode
If Sw 2= OFF –Heat/cool
Fan Control by Heater (HG)
Fan Control by T’stat (HE)
Sw5 –Anti-Rapid Cycle
Timer
Off
4 Minutes
Sw6 –Operation
Manual Thermostat
Programmable Thermostat
Sw7 –Minimum Run
2 minutes
6 Minutes
Sw8 –Program Type
If Sw 6= ON –Programmable
Commercial Program
Residential Program
Sw8 –Set points
If Sw 6= OFF –Manual
Single Set point
Two Set points
Typical drawings have been provided on page 12 of this manual that will
assist with the selection of the correct positions for these function switches.

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Switch 1 –Relay Assignment
The TZT-100 is fitted with 5 relays capable of switching up to 24VAC @ 1Amp each.
Switch 1 sets the function of these relays as either 3 fan speeds with 1 heat and 1 cool
operation or single fan speed with 2 heat and 2 cool, in either HP (heat pump / reverse
cycle) or HC (heat with add on cool) mode.
Switch 2 –Equipment Type.
Both heat with add on cool, or heat pump types of systems can be controlled by the
TZT-100 thermostat.
Heat Cool System uses the “W” terminal(s) only for heating and the “Y” terminal(s) only
for cooling.
Heat Pump systems use the “Y” terminal(s) for BOTH heating and cooling (the
compressor). The “W1” terminal controls the reversing valve which determines the
heating or cooling mode.
Switch 3 –Equipment Stages.
When it is necessary to control a single stage A/C system fitted with auxiliary heating
elements, turn Sw3 OFF thereby selecting single stage mode. Heating elements
controlled by the W2 output are now assigned as stage 2 heat.
Switch 4 –Reversing Valve or Fan mode
Regardless of the other switch positions, this switch should normally be left in the
factory default ON position for all temperzone units.

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Switch 5 –Anti-Rapid Cycle Timer
temperzone recommends that this switch be left in the ON position. This means that
the thermostat’s Anti-Rapid Cycle Timer is in use. The TZT-100 timer will work in parallel
with the Anti-Rapid Cycle Timer in the Air Conditioner’s internal controls. Leaving
“Switch 5” ON will provide the user with feedback as to the equipment status.
Note: When power is first applied to the TZT-100, it “assumes” that the compressor has
just stopped and applies this Anti-Rapid Cycle delay time before starting. This may hold
off the indoor fan also.
Switch 6 –Thermostat Operation
To suit the varying requirements of the user, the TZT-100 can be set as a
“Programmable”thermostat using the time clock to automatically control the building
temperature to a programmed temperature profile or to the very simple to operate,
“Manual”mode where the user turns the thermostat on or off and adjusts the
temperature set point manually.
Switch 7 –Minimum Run Time
To conserve energy and protect the A/C system, it is recommended that each time the
compressor starts it runs for a minimum period of time. This ensures oil return for
lubrication purposes. “Switch 7”enables you to select a minimum run time of 2 or 6
minutes. Once heat or cool cycle has started it must continue for this minimum period.
The LCD will flash the word “Heating” or “Cooling” whenever this timer is holding
Heating or Cooling on past set point, or when the user has changed mode etc.

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Switch 8 –Thermostat Control Logic.
This switch has two functions based on the position of “Switch 6”.
When the TZT-100 is set as a programmable thermostat, “Switch 8”determines
whether a commercial or residential program is selected. When “Switch 6”has the
TZT-100 set as a non-programmable thermostat, “Switch 8” then selects between single
set point mode (imitating a simple mechanical thermostats operation), or separate
heating and cooling set points. “Two set point”mode also permits the user to select a
separate day and night set point if desired.
TT Terminal Functions
The TZT-100 is fitted with a set of terminals marked “TT”. Details of the “TT” terminals
functionality is provided below. See the advanced installer setting menu on page 25 of
this manual for setting the function of this set of terminals. The wiring used in the
following examples are not polarity dependent and do not normally require screened
cable for short runs (less than 10 metres). With longer cable runs, or where there is
electrical noise present, can benefit from the use of screened cable, earthed at one.
Please Note - The TZT-100 can use multiple sensors if required. Drawings
showing these various configurations are shown on page 34 of this manual.

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Outside Air Sensor Wiring
Set “TT= OA” in the advanced installer menu.
The TZT-100 can display the outside air temperature if
desired. Some advanced control functions such as high
and low balance points rely on this sensor to be fitted
for correct operation. Using a single pair of wires
connect the “TT” terminals in the TZT-100 to the two terminals in the outside air
temperature sensor. (See Figure 1). If the outside air sensor fails two dashes will be
shown on the LCD where the outside air temperature would normally be displayed to
alert you of the problem.
Remote Room Temperature Sensor Wiring
Set “TT= RS” in the advanced installer menu. (Default)
When you wish to measure the temperature from a
location distant from the TZT-100, simply connect a
remote temperature sensor to the “TT” terminals in the
TZT-100 controller. This will automatically disable the sensor fitted inside the TZT-100
and use the remote temperature sensor(s) to control the room temperature (Shown in
Figure 1 above). Should you wish, you can easily switch the remote temperature sensor
on and off, thereby switching temperature sensing locations between the remote
sensor and the TZT-100 internal temperature sensor. Simply fit an inline switch in the
sensor wiring. (See Figure 2.)
Figure 1
Figure 2

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Averaging Temperature Sensors
Set “TT= AV” in the advanced installer menu.
If required, the TZT-100 can average the sensed temperature, between the remote
temperature sensor(s) and the one fitted to the TZT-100. (See Figure 1 on the previous
page for details on wiring the sensor.) The TZT-100 will auto-detect this sensor and
automatically average the two sensor values to control the room temperature.
Remote ON / OFF Function
Set “TT= OF” in the advanced installer menu.
The TZT-100 can be connected to an external dry contact.
When this contact is closed the TZT-100 will turn OFF. (See Figure 3.) When the TZT-100
has been switched OFF via the “TT” terminals the word “OFF” will flash in the LCD to
indicate that this has been the shutdown method. The TZT-100 will return to the user
settings when this switch is open.
Using the “Occupancy Mode”
Set “TT= OC” in the advanced installer menu.
The TZT-100 can alternate between the user preferred set points and an installer pre
programmed set point when required. Simply wire a remote switch to the TZT-100 “TT”
terminals (See Figure 3). When the switch is open the user settings will control the
room temperature. When the switch is closed the Installer “Oc”(Occupied Cooling
value) & “Oh”(Occupied Heating value) settings will be used to control the room
temperature.
Figure 3

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Supply Air Temperature Monitoring
Set “TT= DA” in the advanced installer menu.
In this mode, the TZT-100 will ONLY broadcast this sensor temperature value via its
ModBus communication. This value is not used by the TZT-100 nor is it displayed on the
LCD. It is expected that this information is used for supervisory functions or equipment
control feedback.
The TT input pair, is an analogue input designed to read a temperature dependant
resistor, otherwise known as a thermistor. If a switched resistor network is connected
to the TT inputs, a supervisory system can read the varying analog signal present at the
TT terminals as a result of the switching of resistors. This would enable the supervisory
system (BMS), to decode a number of digital states.
Typical Drawings
Simplified Wiring schematics showing different Air Conditioning system configurations
appear on the following pages. The DIP switch combinations corresponding to each of
these systems are shown beside each schematic.

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Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =Off (HC System)
Sw3=Off (Single Stage)
Sw4= Off (HG)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Tip
Set Installer menu Fn=H
Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =Off (HC System)
Sw3=Off (Single Stage)
Sw4= N/A
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Tip
Set Installer menu Fn=C
Figure 4
Figure 5

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Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =Off (HC System)
Sw3=Off (Single Stage)
Sw4= Off (HG)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =Off (HC System)
Sw3=On (Two Stage)
Sw4= Off (HG)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Figure 6
Figure 7

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Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =On (HP System)
Sw3=Off (One Stage)
Sw4= On Heat (B)/ Off Cool (O)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Note –Set SW4 to suit
suit the system
Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =On (HP System)
Sw3=Off (One Stage)
Sw4= On Heat (B)/ Off Cool (O)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Note –Set SW4 to suit
suit the system
Figure 8
Figure 9

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Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =On (HP System)
Sw3=Off (One Stage)
Sw4= On Heat (B)/ Off Cool (O)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Note –Set SW4 to suit
suit the system
Switch Settings
Sw1 = Off (1 speed fan)
Sw2 =On (HP System)
Sw3=On (Two Stage)
Sw4= On Heat (B)/ Off Cool (O)
Sw5= Installer preference
Sw6= User requirements
Sw7= Installer preference
Sw8= User requirements
Note: Set W3=EH
in the installer menu.
Figure 10
Figure 11

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Attaching the thermostat
Check that the position of the 8 DIP switches matches the requirements of the
equipment being controlled and the specific requirements of the user. Detailed
information on the 8 DIP switches can be found on page 6 of this manual.
Check the wiring matches that of the equipment the TZT-100 is to control and that all
wiring is tight and not likely to short between adjacent wires. Equipment wiring
information can be found commencing on page 12 of this manual.
If using the ModBus communication capability of the TZT-100,
ensure the “A”, “B” & “T” data wires are in the correct position as
an error here may affect the communication of the entire
network. See page 35 for detailed wiring of the communications
port of the TZT-100.
Using masking tape or similar, block the hole in the wall
where the wiring enters the back of the thermostat to
prevent drafts that may travel down the inside of the wall
cavity affecting the accuracy of the internally fitted temperature sensor.
Remove and discard the plastic tab on the internally fitted backup battery so
that the battery is now in circuit and operating. Be careful not to pull the battery out
or damage the battery holder when doing this.
Figure 12

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When attaching the thermostat to the base, avoid twisting the case as this may stress
the LCD and cause it to crack. Avoid running wiring near the internally fitted sensor.
Take care not to damage or crush the temperature sensor between the two half’s of
the case when you close the TZT-100 case. Check this sensor location.
Advanced Installer Settings
The TZT-100 is fitted with many advanced functions that can be finetuned by the
installer to specifically match the needs of the project of the user.
Normally these functions will not need to be altered from the factory default position
however, there may be times when you wish to alter a setting or control capability so
that the TZT-100 performance will perfectly match a particular application. On the next
few pages there is detailed explanation of these functions and their range of control.
While in the advanced installer menu, all TZT-100 equipment control functions will be
suspended. Normal equipment operation will continue when you have exited this menu
(after any Anti-Rapid Cycle delays or safety delays have terminated).

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Using the Installer Menu
To move forward through the Installer menu items tap the “O/RIDE”button.
To move backwards through the Installer menu items tap the “PROG”button.
To adjust a value, tap the (Up) or (Down) buttons.
To exit the installer menu, tap the “Mode” button, the “Fan” button or wait 60 seconds.
Entering the Installer Menu
To enter the Installer menu, press and hold the O/RIDE button for 15 seconds. After 15
seconds the LCD will show “88:15”(eight eight one five).
Adjust this value to “88:21”–(eight eight two one) the factory default PIN (or your
previously selected value) by using the (Up) or (Down) button. Tap the O/RIDE
button again to enter the menu.
If you have entered the correct PIN you will be given the first menu option, if you have
entered an incorrect PIN you will be exited from this menu. You may retry.
The Default Values are shown in bold text in heading line of the explanation for each
parameter shown on the following pages:

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PN = 21 Keyboard Lock PIN
This is the required PIN for future entry into the Installer menu.
Range 00 to 99 in 01 steps. To prevent accidental PIN changes, you must press
and hold the or buttons for longer than 1 second to change the PIN value.
(Caution, if you change this value and forget your new PIN, you may need to return the
TZT-100 to temperzone for unlocking, there may be a fee for this service)
LC = 0 Keyboard Lock level
Programmable Mode (SW6=ON)
LC = 00 - Key board Lock OFF.
LC = 01 - All buttons are locked except the Temperature +/- buttons*.
LC = 02 - All buttons are locked except the O/Ride button & Temp +/- buttons*.
LC = 03 - Fan and Program buttons are locked*.
LC = 04 - Fan, Program and Override buttons are locked *.
LC = 05 - All buttons locked except O/Ride.
LC = 06 - All Buttons locked.
Manual Mode (SW6=Off)
LC = 00 - Key board Lock OFF.
LC = 01 - All buttons are locked except the Mode button.
LC = 02 - All buttons are locked except the Mode and temperature +/- button*.
LC = 03 - Fan & O/ride buttons are locked*.
Mode button can only select Auto (Heat & Cool) and off.
LC = 04 - O/Ride Button is locked*.
Mode button can only select Auto (Heat & Cool) and off.
(*Note the temp +/-buttons range can be limited in the HL & CL menu )