FCU 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 controller outputs and the type of fan coil unit to be controlled.
Configuration can be performed with the wizard Off-line or On-line.
| Name | Definition | ||||||
| Types |
Select the hardware version to be used for the controller. The different hardware versions have different combinations of inputs and outputs. See the following table. The type of hardware you select affects the choices that appear in the rest of the pages for FCU. Based on your hardware selection, the configuration software ensures that you cannot configure a controller for application it cannot perform. |
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| Selection in tool | Controller Type | Number of Relays | Number of | Lon Transceiver | |||
| Fan | Reheat | Outputs | Digital In | ||||
| W7752D_F | W7752D |
3 | 1 | 2 | 1 | FTT-10 | |
| W7752F | |||||||
| W7752E_G_J | W7752E | 3 | 0 | 2 | 1 | FTT-10 | |
| W7752G | |||||||
| W7752J | |||||||
Define the type of fan coil unit that is being configured. It describes the number of pipes used on the unit. Two Pipe A fan coil unit that has only two pipes. 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 fan coil unit that has four pipes connected, providing both heating and cooling at the same time. The fan coil controller uses one output to control heating only and one output to controller cooling only, as configured in the control outputs (Equipment Control page). |
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| Relay Outputs |
Select the number of stages required for the fan output.
Select the use of the fourth relay for those controller types with four relays. This relay is normally used for electric reheat, but can also be used for switching equipment not directly controlled by the fan coil controller. Reheat The relay is switched on when the control algorithm demands electrical reheat as defined in the Reheat Options (Equipment Control tab). Free Use The relay is switched on and off as commanded from the network. It is not controlled by the internal fan coil controller temperature control algorithm. Rel Not Used The Relay is not switched by the fan coil controller and cannot be commanded via the network. |
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| 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, and 15 of the controller. Select the control sequence option for output 1. For four-pipe applications, the heating option is recommended to minimize field wiring errors. For two-pipe applications, the changeover option is the only selection. 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 ChangeOver Mode The output is modulated open when heat or cool energy is needed in the space. Not Used The output is not controlled by the controller and always remains off.
Select the type of actuator to be connected to the output. Floating A three-point actuator that can be commanded open or closed. This type is on Terminals 14/15 and/or 17/18. The run times for the actuator are configured in the Equipment Control tab tab. Floating Mid 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 tab. 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 Duty-cycled output where the 24VAC output is pulsed on/off in the duty cycle range: 0 percent to 100 percent. This type drives output Terminal 14 and/or 17. One Stage Single-stage on/off output. This type switches Terminals 14 and/or 17. Two Stage Two-stage on/off output. This type switches Terminal 14/17 for stage 1 and Terminal 15/18 for stage 2. Three Stage Three-stage switched output. The output switches Terminal 14/17 for stage 1 and Terminal 15/18 for stage 2. It switches both Terminal 14+15 and/or 17+18 for stage 3. Thermal Switched on/off output. This type switches a 24V thermal actuator on Terminal 14/17.
The output triac pair connected to terminals 16, 17, and 18 of the controller. Select the control sequence option for output 2. For four-pipe applications, the Cool Mode option is recommended to minimize field wiring errors. For two-pipe applications, the ChangeOver Mode option is the only selection.
The selection options are the same as for Output 1. |
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