Temperature Setpoints - Johnson Controls TEC3322-1 Series Installation Manual

Dehumidification control - fan coil only
The TEC3000 controller support dehumidification control on fan coil devices under three configurations:
• Four-pipe fan coil
• Four-pipe fan coil with reheat
• Two-pipe fan coil (with changeover in cooling mode) with reheat
For optimal dehumidification performance, a 4-pipe unit with floating/incremental or 0 to 10 V control and a multi-
speed or variable-speed fan is recommended.
Dehumidification operates when the zone humidity increases above the zone humidity setpoint and the controller is
in the Idle or Cooling state. Dehumidification does not operate during heating and stops if the zone temperature
drops below the heating setpoint. When dehumidification is active, the cooling device controls to the humidity
setpoint, and the heating device reheats the zone in order to keep the temperature at the cooling setpoint. While in
the dehumidification mode, a multi-speed or variable-speed fan runs at the lowest possible speed to maximize
condensation and moisture removal across the cooling coil.
To enable dehumidification control:
1. Press the Menu icon.
2. Press Setup.
3. Press General Control Setup.
4. Press Dehum Enable and select Yes.
5. Press Save and the back arrow to return to the previous screen.
This point is also exposed to the BAS through the point DEHUM-EN.
To adjust the dehumidification setpoint:
1. Press the Menu icon.
2. Press Setpoints.
3. Press Dehumidification and adjust accordingly.
4. Press Save and the back arrow to return to the previous screen.
This point is also exposed to the BAS through the point DEHUM-SP.

Temperature setpoints

The thermostat controller provides a flexible setpoint configuration to give power to the building owner while being
easy to use by the occupant. In addition to a simple up/down offset adjustment on the home screen for the
occupant, there are six temperature setpoints on the TEC. The six temperature setpoints are Cooling and Heating
setpoints for Occupied, Unoccupied, and Standby modes. To set these setpoints:
1. Press the Menu icon.
2. Press Setpoints.
3. Select the setpoint to adjust and change as desired.
4. Press Save and the back arrow to return to the previous screen.
Note: The TEC enforces a 2-degree deadband between heating and cooling setpoints. If a setpoint violates this
standard (for example, cooling setpoint is set to 70 with a heating setpoint already set to 70), the opposing setpoint
is modified to comply with this deadband (in the previous example, the heating setpoint would automatically
change to 68).
TEC3000 Series Networked and Wireless Proportional Fan Coil and Individual Zone Thermostat Controllers with
Dehumidification Capability Installation Guide
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