Unit installation

DCN: 141-00885-16 1/26/06 TZ40 Thermostat Manual 19
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 a qualified service technician. 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.
The Installer Settings screen displays the current internal settings of the thermostat. You can view and
change the settings from this screen. Scroll to the desired function and use the +/- buttons to change.
Display Lock: Y or N Default: N
Y = Display LOCKED
N = Display unlocked
Allows you to lock or unlock the thermostat buttons. When the buttons are locked, you can still access the
main menu, but you will not be allowed to select any menu options. The Installer Settings hidden button
operation is always operational, allowing you to return to this screen and turn Display Lock off.
Service Mode Submenu
Service Mode: Y or N Default: N
Y = Service Mode On.
N= Service Mode Off.
Sets the thermostat to a test mode with short delays. All runtime and staging delays are reduced
to 15 seconds to speed up system checkout and testing.
Caution: compressor short cycle protection is lost in this mode.
Network Settings Submenu *** DO NOT CHANGE FOR ZWAVE THERMOSTATS ***
Network Address: 1 to 254 (0 and 255 are reserved). Default: 1
Sets the serial communications network address.
Autosend: Y or N Default: N
Y = Autosend On, sends network message when there is a changes in Temp, Setpoints and Mode.
N = Autosend Off. Polled Mode. Only responds to polling requests.
Max Heat SP 10 to 109 Default: 109
Sets the maximum heating setpoint that is allowed. Will not ramp or accept setpoints higher that this
maximum.
Min Cool SP 6 to 110 Default: 6
Sets the minimum cooling setpoint that is allowed. Will not ramp or accept setpoints lower than this
minimum. NOTE: this value needs to be reset if you are going to use degree C mode.
Minimum Run Time 1- 9 Minutes Default: 6
Sets the minimum run time before a heating/cooling cycle can turn off.
Minimum Off Time 5-9 Minutes Default: 6
Sets the minimum off time before another heating/cooling cycle can begin.
Delta T Settings Submenu:
This is a submenu of the delta, or difference between, the setpoint and current temp for determining when
a heat or cool call comes on. Deltas are the number of degrees away from setpoint.
H/C Delta – Setting the minimum separation between heating and cooling setpoints. Attempts to
lower the cooling below the heating setpoint by this amount will PUSH the heating setpoint down
to maintain this separation. Same for setting the heating setpoint above the cooling setpoint will
PUSH the cooling setpoint up to maintain this separation. Range is 3 to 15 degrees. Default set
to 4 degrees.