Electric heat operation
Electric heat operation
The Tracer ZN521 supports both
Baseboard heat operation
When configured for baseboard heat output, the controller turns on base- board heat at 2.2°F (1.2°C) below the active heating setpoint, and turns off baseboard heat at 0.8°F (0.4°C) below the active heating setpoint. The range for activating the baseboard heat cannot be adjusted; however, the heating setpoint is configurable using the Rover service tool.
Baseboard heating is used most effectively when the discharge air tem- perature control high limit is set below 100°F (56°C). If this is done, the unit heat will maintain the temperature on light load days and the base- board heat will be enabled to maintain the temperature on heavier load days.
Dehumidification
The Tracer ZN521 supports a dehumidification feature. Dehumidification is possible if the following are present:
•Mechanical cooling is available
•The heating capacity is located in the reheat position
•A zone humidity sensor is connected at AI4, or a relative humidity (RH) value is transmitted to the controller by a BAS.
•The Space RH Setpoint is valid (configurable using the Rover service tool)
•Dehumidification is enabled using the Rover service tool
The controller initiates dehumidification if the zone humidity exceeds the humidity setpoint. The controller continues to dehumidify until the sensed humidity falls below the setpoint minus the relative humidity off- set.
The controller uses cooling and heating capacities simultaneously to dehumidify the space. While dehumidifying, the controller maintains the zone temperature at the active setpoint.
Note:
Dehumidification is not available for
| 47 |
