The W7763C, D and E Controllers are Chilled Ceiling Controllers in the Excel 10 product line. They cover a wide range of control applications including radiators, induction units, and fan coil units with manual fan switching, chilled ceiling and chilled beam and are suitable for either wall mounting or unit mounting. The controllers can operate as stand-alone units or networked using the standard Echelon LONWORKS bus. Interfaces are provided for a wide range of actuator types. Heating systems can be water or electric, and cooling systems can be chilled water supply or compressors. Extensive timing and interlock features make the W7763 especially suitable for systems using electric heat and compressors.
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The W7763C, D and E are LonMark-compliant Chilled Ceiling Controllers in the Excel 10 family product line. These controllers provide room temperature control using different heating and cooling sequences. The controller is provided with default configuration settings from the factory and is fully operable on installation. Using standard Echelon configuration tools, the controller can be configured with job-specific settings. A variety of T7770 wall modules interface with the Chilled Ceiling Controllers and provide the following options: setpoint adjustment, an occupancy bypass button and LED, and an E-Bus jack. All wall modules include a space temperature sensor, however a remote C7068A return air sensor can also be used.
The following table lists the supported output types.
| Ouput | Options |
| Heating | Floating, thermal, PWM, on/off, multi-stage electric |
| Cooling | Floating, thermal, PWM, on/off, multi-stage compressor |
The following table lists the Chilled Ceiling Controller models.
| Model | Inputs | Outputs | Setpoint Knob | Sensor | Bypass |
| W7763C | 3 | 2 | X | X | X |
| W7763D | 4 | 2 | X | ||
| W7763E | 4 | 2 |
Heat and cool sequences can be selected to be active or not active, giving a total of four different sequence options:
The controller automatically disables heat and cool control until the window is closed again. Frost protection remains active.
The controller has the following modes of operation.
This is the normal operating condition for a room or zone when it is occupied. The controller can be switched into this mode by a network command, by the room occupancy sensor, or by a bypass button on the wall module.
The standby mode saves energy by reducing heating or cooling demand during periods where the room is temporarily unoccupied.
This mode is used for longer unoccupied periods, such as at night or during weekends and holidays.
If the controller is configured for window open detection, the controller automatically disables heat and cool control until the window is closed again. Frost protection remains active.
If the temperature drops below 46 Deg.F (8 Deg.C), the controller enables the heating circuit as frost protection.
When configured with an air flow detector, the controller protects equipment by disabling the system when the fan fails (for fan coil units with manual fan speed control).
The controller operates two-pipe units configured with a changeover input.
When configured with a chilled water temperature sensor, the controller will close the cool valve when the chilled water temperature falls below the dewpoint. The dewpoint may be a fixed value or calculated based upon input from a humidity sensor.
When configured with a condensation switch, the controller will close the cool valve
when condensation is detected.
| Inputs | Function | Pin Number | Characteristics |
| Digital | Window/occupancy/changeover/air flow/condensation | 4 | Closed <= 400 ohm, open >= 10K ohm |
| Digital (See Table of Supported Output Types) |
Override | 7 | Closed <= 400 ohm, open >= 3.3k ohm |
| Analog | Humidity Sensor | 1 | 0 to 10 Vdc |
| Analog | Temperature Sensor | 3,9 | 20K ohm NTC (25 Deg.C) |
| Analog (Wall module connection only.) |
Setpoint adjustment | 8 | 10k Ohm |
| Outputs | |||
| Digital (Wall module connection only.) |
Override LED | 6 | 0/5 VDC (l<10mA) |
| Triac (2 pairs) | Heat and cool | 14,15, 17, 18 | 24 VAC, 250 mA max continuous, 650 mA max surge (<=30 sec) |