Mode Of Operation; Icon Functions - Bosch 3H/2C Installation & Operation Manual

Installation, Operation & Application Manual
Reset Check Filter Timer

—
Used to reset the elapsed number of (fan running) hours for the Check
Filter Timer
—
Press or to select
—
Press to advance to the next screen or press
configuration setting mode.
Auto exit occurs after two minutes of no icons being touched.
RESET
Check
Filter
CONFIG
Figure 25
Bosch Thermotechnology Corp. | 08.2016
(YES).
to exit
Bosch 3H/2C Touch-TechnologyThermostat | 13

6 Mode of operation

BC7801 is based on the i3020R, but adds connections to the UPM to read UPM fault
codes. It saves fault code history and displays a new message on the front panel of
the thermostat to alert the user to call a service technician to service the system.
The thermostat is a programmable, manual or auto changeover, up to 3-stage heat
and up to 2-stage cool thermostat. It functions with air conditioning, heat pumps,
gas, oil, or electric heat systems. The thermostat activates the heating appliance
when the room temperature is below the set heat temperature (by the diff erential
temperature). When the call for heat has been satisfi ed, the outputs are turned off .
With heat pumps, the thermostat will not let the compressor come on for 4 minutes
after it turns off to protect your compressor.
When the room temperature is greater than the set cool temperature (by the
diff erential temperature), the cooling device is activated. When the call for cooling
has been satisfi ed, the outputs are turned off . The thermostat will not let the
compressor come on for 4 minutes after it turns off to protect your compressor.
The program schedule can be overridden by changing the set temperature (
). This puts the thermostat into a temporary hold. It will automatically return to
the program schedule depending on how the override feature is confi gured.

6.1 Icon Functions

UP – Used to increase the time, set temperatures, and to adjust
confi guration settings.
DOWN – Used to decrease the time, set temperatures, and to adjust
confi guration settings.
MENU – Used to enter confi guration, set the clock, lock the thermostat,
or select viewing options.
—
CONFIG Sets up thermostat to work for specific
—
CLOCK Set year, month, date, and time.
—
LOCK Allows you to lock the thermostat to prevent
tampering.
—
VIEW Allows you to see both the remote sensor
temperatures, date, current schedule period, lock screen,
filter accumulated time, and show details (system status).
FAN – Used to select between AUTO, ON, and HOURLY fan operation.
MODE – Used to select between OFF, HEAT, EMERGENCY HEAT (heat
pump only), COOL, and AUTO changeover modes.
HOME – Wakes thermostat, returns to home screen, and enters changes
into memory.
SCHEDULE – Used to edit program schedule, turn program on and off ,
and set vacation return dates.
CALL
CALL SERVICE TECH – Message appears when the thermostat senses a
SERVICE
TECH
lockout condition occured on the UPM.
CHECK FILTER – Message appears when the blower motor set runtime
has been met. Indicates the air fi lter should be
checked, cleaned, or changed.
systems.
Data subject to change
or