Honeywell TH8321 Benutzerhandbuch

31

68-0280—01

The Humidifier Pad change reminder must be turned on from 

the Installer Setup. Once expired, the screen flashes, 

“Change Humidifier Pad” and a Reset key appears. Press the 

Reset key to reset the change reminder. 

The remaining calendar days can be viewed by pressing the 

More key. The remaining days can be edited using the More 

key or from the Installer Setup. To view or reset the reminder 

before it expires, follow these steps using the More key:

1. Press the More key until the Humidifier Pad change 

reminder appears on the screen. This is the number of 

calendar days remaining on the Humidifier Pad 

reminder.

2. Press the Edit key. 

3. Use the Up and Down keys to change the number of 

calendar days.

4. Press the Done key to go back to the viewing screen.

5. Press the Reset key to activate the new number of days 

selected in the previous screen.

6. Press the Done key to return to the Home Screen.

The UV Lamp change reminder must be turned on from the 

Installer Setup. Once expired, the screen flashes, “Change 

UV Lamp” and a Reset key appears. Press the Reset key to 

reset the change reminder.

The remaining calendar days can be viewed by pressing the 

More key. The remaining days can be edited using the More 

key or from the Installer Setup. To view or reset the reminder 

before it expires, follow these steps using the More key:

1. Press the More key until the UV Lamp change reminder 

appears on the screen. This is the number of calendar 

days remaining on the UV Lamp reminder.

2. Press the Edit key. 

3. Use the Up and Down keys to change the number of 

calendar days.

4. Press the Done key to go back to the viewing screen.

5. Press the Reset key to activate the new number of days 

selected in the previous screen.

6. Press the Done key to return to the Home Screen.

The thermostat feature, Adaptive Intelligent Recovery™, 

eliminates all guesswork when setting the thermostat 

schedule. 

Simply set the program schedule to the time that the comfort 

temperature is desired. The thermostat then turns on the 

heating or cooling at just the right time to have the home 

reach the scheduled temperature at the scheduled time.

For example—get up at 6:00 AM and want the temperature to 

be 70°F. Set the Wake period for 6:00 AM and 70°F. The 

thermostat then turns on the heat before 6:00 AM to raise the 

temperature to 70°F by 6:00 AM.

The thermostat alerts that the heating or cooling system is 

coming on before a scheduled time by showing “Recovery” on 

the screen.

NOTE: It takes about a week for the thermostat to adjust to 

local weather, the schedule, the construction of the 

home and the heating and/or cooling system. Each 

day it adjusts the next day’s recovery start time 

accordingly.

The thermostat microprocessor-based control requires that 

the user understands temperature control and thermostat 

performance. A conventional mechanical or electronic 

thermostat does not control temperature precisely at setpoint. 

Typically there is an offset (droop) in the control point as the 

system load changes. This is a phenomenon that most people 

in the industry know and accept. Many factors contribute to 

offset including switch differential, thermal lag, overshoot, 

cycle rates and system load.

The thermostat microprocessor simultaneously gathers, 

compares and computes data. Using this data, it controls a 

wide variety of functions. The special proprietary algorithm 

(program) in the thermostat eliminates the factors causing 

offset. This makes temperature control more accurate than 

the conventional mechanical or electronic thermostats. The 

temperature control algorithm is called proportional plus 

integral (P+I) control.

The thermostat sensor, located on the thermostat or remote, 

senses the current space temperature. The proportional error 

is calculated by comparing the sensed temperature to the 

programmed setpoint. The deviation from the setpoint is the 

proportional error.

The thermostat also determines integral error, which is a 

deviation based on the length of error time. The sum of the 

two errors is the (P+I) error. The cycle rate used to reach and 

maintain the setpoint temperature is computed using the P+I. 

The additon of the integral error is what differentiates the 

thermostat from many other electronic and mechanical 

thermostats. See Fig. 31.

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CLOCK SCREEN

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M22301