DCN: 140-02121-02 Page 2
INSTALLATION
Thermostat Power
The TBZ48 can be operated by battery power or 24VAC.
Important Note: If the thermostat is installed on a Z-Wave network while it is battery
powered, it will operate as a Z-Wave FLiRS endpoint device. If it is installed on a Z-Wave
network when it is 24VAC powered, it operates as an always-on Z-Wave routing device.
If the power method is changed after the thermostat is installed on a Z-Wave network, it
must be uninstalled and re-installed so that the network knows what kind of powered
device it is.
Battery Power
The TBZ48 can be powered by either two AA Alkaline batteries or four AA Alkaline
batteries. The thermostat will operate for approximately one year on two AA Alkaline
batteries depending on the frequency of user operations and backlight operation.
Operation on four AA Alkaline batteries will be approximately twice as long. Always use
Alkaline batteries and replace in complete sets (2 or 4) at a time with new units.
24VAC Power
The thermostat can also be powered from the HVAC system. Both the C wire (24VAC
common wire - typically blue) and the R wire (24VAC hot wire - typically red) are
required for 24VAC operation.
Note! Do not install batteries if the thermostat is powered from 24VAC. They are not
required for backup.
Heating & Cooling System (HVAC) Setup
The thermostat must be setup for the correct system type and configuration of the HVAC
system for proper operation.
Default HVAC System Settings
The thermostat is default setup for the following typical HVAC system configuration:
HVAC system type: Standard gas/electric
HVAC fan type: Gas heat
HVAC heating stages: one
HVAC cooling stages: one
If installed on this type of a HVAC system, the System setup does not need to
change. Proceed to the wiring installation.
If installed on a Heat Pump HVAC system or any HVAC configuration other than the
default settings, change the default HVAC system settings in the SYSTEM setup menu.
Changing the default HVAC system setup
The thermostat normally displays the Thermostat Main Control Screen. To change the
thermostats HVAC system defaults, select the Menu Screen and then select the SYSTEM
menu. Follow instructions below to access the SYSTEM screen.
Thermostat button operation: To conserve battery life, the thermostat backlight
turns off after a short time of no activity. The first press of any button turns on the
backlight (but does not initiate any action). Press the button again to initiate the action
desired. If the backlight is already on, button presses work with the first press.
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