CHC applications can have a variable number of heating and cooling stages. The number of pipes used on the unit could be two or four. The outputs could be of staged, PWM, floating, or Thermal type. In addition the outputs can be of Change over mode.
Define the operation of the chilled ceiling controller outputs and the type of equipment to be controlled.
Configuration can be performed with the wizard Off-line or On-line.
| Name | Definition |
| Application |
Select/disable ceiling protection. Condensation Protection Chilled Ceiling protection option. It enables dew-point calculation and condensation protection. The cold water temperature value must be available (either wired connected or shared via the network). If the humidity value is available (either connected or shared via the network), the controller uses it to calculate the dew-point temperature for the cold water temperature limitation; otherwise it uses a settable dew-point setpoint. No Condensation Protection Disable the dew-point temperature calculation and protection. The cold water temperature and the humidity are not needed by the controller; the chilled ceiling protection can still be performed by the condensation switch.
Define the type of equipment that is being controlled in terms of the number of pipes used on the unit. Two Pipe A unit that has only two pipes. Selecting this system type limits the controller to control only one valve output and operate in a changeover mode. When operating in the changeover mode, the controller uses only the one valve for controlling both heating and cooling. Use this configuration only when changeover operation is required. Four Pipe A unit that has four pipes connected, providing both heating and cooling at the same time. The controller uses one output to control heating only and one output to control cooling only, as configured in the Outputs page. |
| Control Outputs | Configures the two control outputs for the different type of actuators and
control sequences required for the application.
The output triac pair connected to terminals 13/14/15 of the controller. Heat Mode The output is modulated open when heat energy is needed in the space. Cool Mode The output is modulated open when cool energy is needed in the space; it is also modulated to limit the cold water temperature above dew-point temperature (if enabled). ChangeOver Mode The output is modulated open when heat or cool energy is needed in the space. In Cool Mode, the output is modulated to limit the cold water temperature above the dew-point temperature (if enabled). Not Used The output is not controlled by the controller and is always off.
Select the type of actuator to be connected to the output. Floating A three-point actuator that can be commanded open or closed. It is on terminals 14/15 and/or 17/18. The run-times for the actuator are configured in the Outputs page. Floating A three point actuator that can be commanded open or closed on terminals 14/15 and/or 17/18. The run-times for the actuator are configured in the Outputs page. The Zero Energy Position (no Heat and no Cool) is the middle Position (50%). The Cool Range is 0 to 50%; the Heat Range, 50 to 100%. The Range can be reversed by selecting the Actuator Direct or Reverse Option. During the Synchronization Process, the fan is turned off. PWM A duty-cycled output where the 24VAC output is pulsed on/off in the duty cycle range 0% to 100%. This actuator drives output terminal 14 and/or 17. One Stage A single-stage on/off output. It switches terminals 14 and/or 17. Two Stage A two-stage output: Terminals 14/17 are switched for stage 1 and terminals 15/18 are switched for stage 2. Three Stage A three-stage switched output. Terminals 14/17 are switched for stage 1, terminals 15/18 are switched for stage 2. Both terminal 14+15 and/or 17+18 are switched for stage 3. Thermal A switched on/off output for switching a 24V thermal actuator on terminal 14/17.
The output triac pair connected to terminals 16/17/18 of the controller.
The selection options are the same as for Output 1. |