Humidifier Pad Reminder; Uv Lamp Reminder; Temperature Recovery; P+I Control - Honeywell VisionPRO 8000 Owner's Manual

VisionPRO TM 8000 Touchscreen Programmable Thermostat
Humidifier Pad Reminder
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.
UV Lamp Reminder
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.
Temperature Recovery
The thermostat feature, Adaptive intelligent Recovery
TM,
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°R 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.
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Following
Schedule
Recovery
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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.
P+I Control
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.
31 68-0280