Economy Mode; Freeze Protection - Carrier ComfortVu TB-24-HM Installation And Operation Manual

Operating instructions (cont.)

Economy mode

Activate Economy mode by triggering a window contact, door switch,

key-tag, remote economy switch, the built-in PIR sensor (passive
infrared sensor), or through communication – binary value
"UnoccupiedByNetwork".
When Economy mode is active, the thermostat will use special

economy setpoints for cooling and heating set by technician.
See objects "EconomySetpointinHeat" and "EconomySetpointinCool"
in the Technician Settings section of this manual.

Freeze Protection

The Freeze protection feature will not allow the room temperature to drop below
predefined cut-in temperature. Depending on which configuration the system is
operating under (W/WO Heat pump), this feature will force the system to operate
in heat mode and activate the fan.
This feature will take effect when the thermostat is either ON or OFF. When the
room temperature rises above the predefined cut-out temperature, the thermostat
will return to its previous state.
When freeze protection is activated, the display alternates between "AL" and
room temperature.
Cut-out
- 11 -
Economy by window contact
Economy by built-in PIR, by the
remote economy switch, or through
communication
Economy by door switch
Economy by Key-tag
Temperature
Cut-in
Normal work Freeze protection
Time