Honeywell PC8900A Manual page 28

The current day and time are now programmed. The
preprogrammed schedule is activated. The preprogrammed
settings can be customized or cleared. When using the
preprogrammed settings as is, programming is done. To
customize or create a new program, follow the steps in the
Setting a Customized Program section. Operating the Comfort
Center™ section shows how to make any temporary changes.
Setting a Customized Program
Planning your Program
Plan a schedule before programming. Leave any period blank
when no setting is required. When an outdoor sensor is part of
the system, enter a frost setting. The humidity and frost
settings are the same for the entire program.
Programming the First Day
When changing the existing program, go to step 7a. When
clearing the program and starting over, proceed as follows.
NOTE: Press the RUN key at any time to exit the
programming mode.
1. Clearing Current Program
a. Press SELECT PERIOD.
SYSTEM
CHECK
SELECT
PERIOD
SET SYSTEM FAN
CLOCK DAY
HEAT OFF COOL AUTO ON CIRC
SELECT
HUMIDITY VENTILATE
PERIOD TIME
TIME
CANCEL
b. Hold CANCEL until display shows PROG CLR .
SYSTEM
CHECK
CANCEL
SET SYSTEM
CLOCK HEAT OFF COOL DAY
SELECT
PERIOD HUMIDITY
TIME
TIME
CANCEL
2. Setting Day, Time, and Setpoints
a. Press SELECT PERIOD until display shows WAKE .
SYSTEM
CHECK
SELECT
PERIOD
SET SYSTEM
CLOCK DAY
HEAT OFF COOL AUTO ON CIRC
SELECT
HUMIDITY VENTILATE
PERIOD TIME
TIME
CANCEL
b. Press DAY until display shows MON .
SYSTEM
CHECK
DAY
SET SYSTEM
CLOCK
HEAT OFF COOL DAY AUTO ON CIRC
SELECT
HUMIDITY
PERIOD VENTILATE
TIME
TIME
CANCEL
c. When display reads COOL SET PT , press HEAT/
COOL SETPOINTS to switch to HEAT SET PT .
SYSTEM
CHECK
HEAT/COOL
SETPOINTS
SET SYSTEM
CLOCK HEAT OFF COOL DAY
SELECT
PERIOD HUMIDITY
TIME
TIME
CANCEL
d. Press and hold a TIME key until the display shows
the desired starting time. The time changes in ten-
minute increments.
SYSTEM
CHECK
TIME
TIME
SET SYSTEM
CLOCK
HEAT OFF COOL
SELECT
HUMIDITY
PERIOD
CANCEL
68-0173—3
HEAT SET PT
HEAT/COOL
SETPOINTS
MON
WAKE
HOLD
RUN
FAN HEAT/COOL
AUTO ON CIRC SETPOINTS
VENTILATE HOLD
RUN
HEAT SET PT
FAN HEAT/COOL
SETPOINTS
MON
WAKE
HOLD
RUN
HEAT SET PT
FAN HEAT/COOL
SETPOINTS
MON
HOLD WAKE
RUN
HEAT SET PT COOL
FAN HEAT/COOL
AUTO ON CIRC SETPOINTS
VENTILATE HOLD
RUN
AM
FAN HEAT/COOL
DAY SETPOINTS
AUTO ON CIRC
MON
VENTILATE HOLD
TIME
TIME
RUN
M6215
e. Press and hold the up or down arrowhead key until
the display shows the desired temperature.
f. Press HEAT/COOL SETPOINTS to switch to COOL
SET PT .
HEAT/COOL
SETPOINTS
NOTE: The time is used for both heating and cooling.
g. Press and hold the up or down arrowhead key until
the display shows the desired temperature.
NOTES:
— When the numbers do not move while you are
COOL
holding the up or down arrowhead key, the setting
limit (45°F and 88°F) is reached.
— When set for auto changeover, there must be 3°F
M6206
between the heating and cooling setpoints. When
setting the cooling setpoint with the heating setpoint
at 68°, the cooling setpoint can be no lower than 71°.
And when cooling is set for 70°, the heat setpoint
changes to 67°. The PC8900A automatically pushes
the alternate setpoint so you can adjust the setpoint
M6205
to its desired setting.
— When set for manual changeover, the 3° differential
between the heating and cooling setpoint does not
apply.
COOL
3. Setting Fan
IMPORTANT
M6206
The FAN and VENTILATOR settings are the same for
heating and cooling. The FAN setting for heating
COOL
cannot be set for AUTO and the cooling set for CIRC.
a. Press FAN until FAN AUTO, FAN ON or FAN CIRC
M6207 is displayed, as desired.
FAN
AUTO ON CIRC
NOTES:
M6209
— AUTO means the fan only runs when heating or
cooling is running.
— ON means the fan runs during this entire period.
— CIRC means the fan runs at least 30 percent of the
time during this period, including when the heating or
cooling system is running.
28
SYSTEM
HEAT SET PT COOL
CHECK
SET SYSTEM FAN HEAT/COOL
CLOCK DAY SETPOINTS
HEAT OFF COOL AUTO ON CIRC
SELECT
HUMIDITY VENTILATE HOLD
PERIOD TIME
TIME
CANCEL RUN
SYSTEM
HEAT
CHECK
SET SYSTEM FAN HEAT/COOL
CLOCK HEAT OFF COOL DAY AUTO ON CIRC SETPOINTS
SELECT
PERIOD HUMIDITY VENTILATE HOLD
TIME WAKE
TIME
CANCEL RUN
When you change the time while setting the
cooling temperatures, the time is also changed
for heating.
SYSTEM HEAT
CHECK
SET SYSTEM FAN HEAT/COOL
CLOCK HEAT OFF COOL DAY AUTO ON CIRC SETPOINTS
SELECT
PERIOD HUMIDITY VENTILATE HOLD
TIME
TIME
CANCEL RUN
SYSTEM
HEAT
CHECK
SET SYSTEM FAN HEAT/COOL
CLOCK DAY SETPOINTS
HEAT OFF COOL AUTO ON CIRC
SELECT
PERIOD HUMIDITY VENTILATE HOLD
TIME WAKE
TIME
CANCEL RUN
FAN
AUTO
M6210
COOL SET PT
FAN
AUTO
M6231
COOL SET PT
FAN
AUTO
M6232
COOL SET PT
FAN
AUTO
M6213