TB3 SERIES COMMUNICATING THERMOSTATS INSTALLATION INSTRUCTIONS
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USERS INTERFACE
The TB3 thermostat user interface consists of a multi-segment display and five function keys.
NOTE:
When Time Schedule is enabled, and the Local/Remote selection point is set to “Local Control,” the On/Off
button is locked. If “Remote Control” is chosen, the On/Off key will be unlocked even if the user has locked it.
After a certain time, the value of the Local/Remote selection point will be changed to “Local Control.” The user
will not be able to change the Key Log value at this time.
Name
Key
Symbol
Description
On/Off
Key
Switch device state on/off.
Mode
Key
1.
Mode Selection:
To change the modes, press the mode key. The modes available for
selection will vary depending on the available pipe system.
• For 2-Pipe System, modes available are - Cooling, Heating, and Ventilation.
• For 4-Pipe System, modes available are - Auto, Cooling, Heating, and Ventilation.
NOTE:
In 2 pipe systems, the device will operate in the auto mode based on the supply water
temperature measured from the changeover sensor if it is selected. In this case, the user
will not be able to change the mode.
2.
Time Selection:
As soon as the mode key is pressed for three seconds, the year will appear
on the screen, followed by the month, hour, minute, and day of the week on successive taps.
To adjust the required time, use the up and down arrow keys.
3.
Schedule Operation:
After selecting the day of the week in the time selection, press the
mode key again to enter the schedule menu. The sequence of events to configure the
schedule is as follows:
When in schedule mode, “Monday opening time hour digit” displays > Tap the mode key to
enter the edit mode and use up and down to configure the parameter > Tap the mode key
again to display “Monday closing time minute digit” > Tap the mode key to enter the edit
mode and use up and down to configure the parameter.
4.
Key Lock Operation:
Pressing the mode key along with the up key displays the lock on the
screens and locks the panel. To unlock, press the same combination of keys again. “Key
Lock” options can be changed via parameter P6. Refer to the
Up Key
Increase the set value.
Down
Key
Decrease the set value.
Fan Key
Change the fan speed to low, medium, high, and automatic.