Honeywell manual Application Types, Output 2 models TB6980B and TB7980B, Minimum Opening

4.2 Application Types

The following table shows the different thermostat applications and their corresponding settings in the configuration menu.

Menu setting		Description
0	Internal	To control the ambient temperature using the internal
	sensor	(built-in) sensor
		To control the ambient temperature using the
1	Room	50014156-002 temperature sensor (the internal sensor
		is not used)
		To control the temperature at the air return using the
2	Air return	50014157-001 temperature sensor (the internal sensor
		is not used)
		To control the temperature at the fresh air supply using
3	Air supply	the 50014157-001 temperature sensor (the internal
		sensor is not used)
	Automatic	To control the ambient temperature using the internal
4		sensor. The 50014157-001 temperature sensor is used
	changeover	for automatic changeover. See section 5.5.1.
		To use the outdoor air for cooling whenever possible.
		The 50014157-001 temperature sensor is used to
		measure the outdoor air temperature. The internal
		temperature sensor measures the room temperature
	Limited	which is then compared with the setpoint. If the room
5		temperature is lower than the setpoint, the air intake
	cooling
		damper remains closed. If the room temperature is
		higher than the setpoint, the latter is then compared with
		the outdoor temperature. If the fresh air temperature is
		lower than the setpoint by more than 5°F(3°C), the
		damper opens to allow cool air in.

4.3 Output 1

Output 1 is used to control a damper. It controls heating when the thermostat is in heat mode or cooling when the thermostat is in cool mode.

Set the following configuration parameters:

•Default mode

•Output type (TB7980 models only)

•Minimum opening

•Opening time (TB6980 models only)

4.3.1Default Mode / Output Type

The default mode (heat/cool) is used for the following:

•The default mode is the thermostat’s mode at power-up.

•The default mode is the active mode when the N.O. changeover contact is open (see section 5.5.2).

•When configured as a contact (see section 4.5), Output 3 controls either heating or cooling depending on whether the default mode is set to heat or cool respectively.

The following table shows the different default modes, the different output types for Output 1, and their corresponding settings in the configuration menu.

Menu setting	TB7980 models	TB6980 models
0	Cool / 0-10 V analog	Cool
	(max. of 10 min. refresh)	(24 V tri-state floating)
1	Heat / 0-10 V analog	Heat
	(max. of 10 min. refresh)	(24 V tri-state floating)
2	Cool / 2-10 V analog
	(max. of 10 min. refresh)
3	Heat / 2-10 V analog
	(max. of 10 min. refresh)

4.3.2 Minimum Opening

The minimum damper opening can be set between 0 and 50 %.

Note: It is not recommended to set the minimum damper opening to 0 % (fully closed) when a duct heater is connected to Output 2 or 3.

4.3.3 Opening time (TB6980 models only)

The damper opening time can be set between 80 and 160 seconds.

4.4 Output 2 (models TB6980B and TB7980B)

Output 2 controls heating only, regardless of the thermostat’s mode. When the thermostat is in heat mode, Output 2 is activated as soon as Output 1 reaches its full capacity. When the thermostat is in cool mode, Output 2 is activated when the measured temperature drops below the setpoint.

The following table shows the output types for Output 2 and their corresponding settings in the configuration menu.

Menu setting			Description
0	Not used
1	24	VAC pulsed (triac) / 1 sec. cycle
2	24	VAC pulsed (triac) / 10 min. cycle / direct action
	(e.g., N.C. thermal valve)
3	24	VAC pulsed (triac) / 10 min. cycle / reverse action
	(e.g., N.O. thermal valve)
4	24	VAC pulsed (triac) / 15 min. cycle (e.g., mechanical
	relay such as R841)
5	0-10		V pulsed / 1 sec. cycle
6	0-10		V analog / 1 sec. refresh
	(e.g., SCR controlled device such as a re-heater)
7	0-10		V analog / max. of 10 min. refresh (e.g., valve)
8	2-10		V analog / max. of 10 min. refresh (e.g., damper)

Note: If 0-4 is selected, set the SW6 switch to Triac. If 5-8 is selected, set the switch to Analog (see section 4.7)

TB6980/TB7980 4/6