Bedienungsanleitung Honeywell TB6980 (Seite 5 von 6) (Englisch)

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TB6980/TB7980 62-0238 400-150-005-B 3/23/06 5/6

4.5 Output 3 (models TB6980B and TB7980B)

The following table shows the output types for Output 3 and their

corresponding settings in the configuration menu.

When any setting between 1 and 4 is selected, Output 3 controls

heating only, regardless of the thermostat’s mode.

When setting 5 is selected, Output 3 controls heating or cooling

depending on whether the default mode has been set to heat or

cool respectively (see section 4.3.1). For example, if the default

mode has been set to heat mode, the contact remains opened when

the thermostat is in cool mode. When the thermostat is in heat

mode, the contact closes when Output 1 reaches a percentage of its

capacity, set via the configuration menu.

4.6 Minimum and Maximum Setpoints

The minimum and maximum setpoints are factory-set at 10°C

(50°F) and 35°C (95°F). The maximum setpoint can be set between

35°C (95°F) and (minimum setpoint + 1). The minimum setpoint can

be set between 10°C (50°F) and (maximum setpoint - 1).

4.7 DIP Switches

Three switches at the back of the control module are used to select

various options.

Temperature Display (SW1)

Selects the desired temperature display (°C or °F).

Access Mode (SW2)

Selects the operation mode (NORM) or the configuration mode

(MENU).

• Place the switch to MENU to access the configuration menu.

• Place the switch to NORM for normal display.

Output 2 Type (SW6)

Sets Output 2 type (Analog or Triac).

WARNING: Place the switch according to the type of device (Ana-

log or Triac) connected to Output 2. Failure to do so can result in

thermostat damage.

5. Operation

5.1 Backlight

To turn the backlight on, press any button. The display will illuminate

for 12 seconds.

5.2 Temperature Display and Setting

The thermostat usually displays the actual temperature. To view the

setpoint, press once on one of the buttons. The setpoint

appears for 5 seconds and is indicated by the display. During the

setpoint display, press one of the buttons to change it.

Note: The temperature setpoint is automatically increased or

decreased by 1°C (2°F) when the controller switches to heating

mode or to cooling mode respectively. For example, if the setpoint is

at 25°C in heating mode, it will become 26°C in cooling mode and

will return to 25°C when the controller is back in heating mode.

5.3 Output Display

The bar graph represents the voltage for an analog out-

put or the duty cycle for a triac output. The bar graph

usually shows Output 1 power (% of damper opening).

To view Output 2 or 3, press Override for 2 seconds to

enter the diagnostic mode. Press Override momentarily

to switch between the three output graphs. To exit the

diagnostic mode, press Override for 2 seconds or wait

for 1 minute for the mode to exit automatically.

5.4 Mode Changeover

The thermostat can switch between heat mode and cool mode

either via:

• the automatic changeover

• the changeover input

5.4.1 Automatic changeover

In automatic changeover, the thermostat detects when the system

switches between heat mode and cool mode by comparing the air

supply temperature with the ambient temperature. If the thermostat

is in heat mode, it switches to cool mode when the air supply is

cooler than ambient by 5°C (9°F) or more. If it is in cool mode, it

switches to heat mode when the air supply is warmer than ambient

by 5°C (9°F) or more.

Note: Neither the heat mode icon ( ) nor cool mode icon ( )

appears when the thermostat is placed in automatic changeover.

Menu setting Description

0 Not used

1 24 VAC pulsed (triac) / 1 sec. cycle

24 VAC pulsed (triac) / 10 min. cycle / direct action

(e.g., N.C. thermal valve)

24 VAC pulsed (triac) / 10 min. cycle / reverse action

(e.g., N.O. thermal valve)

24 VAC pulsed (triac) / 15 min. cycle (e.g., mechanical

relay such as R841)

N.O. contact (The contact closes when Output 1 reaches

or exceeds set percentage. See section 4.1.)

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