Honeywell W7750A Heating, Economizer, IAQ Option, Coil Freeze, Stat Option, Filter Monitor

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Table 15. Configuration Options Summary For W7750A,B,C Controllers.

		Possible Configurations for the
Option		W7750A Model		Possible Configurations for the W7750B,C Models
Type of	1.	One stage.	1.	One stage.
Heating
	2.	Two stages.	2.	Two stages.
	3.	Three stages.	3.	Three stages.
	4.	Four stages.	4.	Four stages.
	5.	None.	5.	Series 60 Modulating electric valve, or pneumatic via transducer.
			6.	Pulse Width Modulating electric valve, or pneumatic via transducer.
			7.	None.
Type of	1.	One stage.	1.	One stage.
Cooling
	2.	Two stages.	2.	Two stages.
	3.	Three stages.	3.	Three stages.
	4.	Four stages.	4.	Four stages.
	5.	None.	5.	Series 60 Modulating electric valve, or pneumatic via transducer.
			6.	Pulse Width Modulating electric valve, or pneumatic via transducer.
			7.	None.
Type of	1.	Digital Output Enable/Disable	1.	Digital Output Enable/Disable signal for controlling an external
Economizer		signal for controlling an external		economizer package.
		economizer package.
	2.	Series 60 Modulating electric	2.	Series 60 Modulating electric damper motor, or pneumatic via
		damper motor, or pneumatic via		transducer.
		transducer.
	3.	None.	3.	Pulse Width Modulating electric damper motor, or pneumatic via
				transducer.
			4.	None.
IAQ Option	1.	None.	1.	None.
	2.	Local IAQ Digital Input— directly	2.	Local IAQ Digital Input— directly wired to the controller. (Contacts
		wired to the controller. (Contacts		closed means poor IAQ is detected.)
		closed means poor IAQ is
		detected.)
	3.	Network (IAQ Override signal	3.	Network (IAQ Override signal received via the LONWORKS Bus).
		received via the LONWORKS Bus).
			4. Local CO2 Analog Input— directly wired to the controller. (The sensor
				must be a 0 to 10V device representing 0 to 2000 PPM CO2.)
Coil Freeze	1.	None.	1.	None.
Stat Option
	2.	Local Coil Freeze Stat Digital	2.	Local Coil Freeze Stat Digital Input— directly wired to the controller.
	Input— directly wired to the controller.		(Contacts closed means that coil freeze condition is sensed.)
	(Contacts closed means that coil
	freeze condition is sensed.)
Filter Monitor	1.	None.	1.	None.
Option
	2.	Local Dirty Filter Digital	2.	Local Dirty Filter Digital Input— directly wired to the controller.
		Input— directly wired to the		(Contacts closed means that the filter is dirty.)
		controller. (Contacts closed means
		that the filter is dirty.)
			3.	Local Analog Input for Differential Pressure across the Filter (directly
				wired to the controller). The sensor must be a 2 to 10V device
				representing 0 to 5 inw (1.25 kPa).

ROOM TEMPERATURE SENSOR (RmTemp)

This is the room space temperature sensor. This sensor is the T7770 or the T7560A,B Wall Module. When it is configured, it provides the temperature input for the W7750 temperature control loop. If it is not configured, it is required that a room temperature sensor value be transmitted from another

LONWORKS Bus device. If no valid room temperature value is available to the W7750 Controller, the temperature control algorithm in the controller is disabled, causing the heating, cooling, and economizer control outputs to be turned off. If the W7750 Controller is configured for Continuous Fan (rather

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