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Cool Switch
OFF—Cooling will not come on.
AUTO—Cooling will come on when any zone is more than 1.5°F
above desired cool setpoint.
Fan Switch
ON—Fan will stay on continuously (recommended).
AUTO—Fan will come on only when heating or cooling is
required.
Emergency Heat Switch (Heat Pump Systems only)
OFF—Electric strip heat will not come on unless there is a zone
more than 2°F below desired heat setpoint and comfort trend
demand has been satisfied.
ON—When any zone requires heat, electric strip heat will turn on.
The compressor will remain off.
CONTROLLER DISPLAY
When set for normal operation, the 4 zone controller display shows
current zone temperature setpoints and allows adjustment of these
setpoints using setpoint buttons. By pressing both heating or
cooling setpoint buttons simultaneously, controller will lock in and
display temperatures for that zone. To release, push both buttons
simultaneously again. This will only work when T-20 is off.
ZONE SELECTOR DIAL
To view setpoints for each zone, turn zone selector dial to zone
number you wish to view.
The setpoints for selected zone will be displayed in controller
display.
Program Schedules
Each zone has 3 different weekly periods, (Weekdays, Saturday,
and Sunday) and up to 4 different possible combinations of heating
and cooling setpoints that can be programmed to provide auto-
matic climate control depending upon day of week and time of
each day. Each zone can be programmed independently. (See
Table 9.)
NOTE: All zones must be programmed.
Vacation Mode
Vacation mode displays current vacation temperature setpoints and
allows adjustment of these setpoints using setpoint buttons. These
setpoints are used by all zones until selector dial is returned to 1 of
the zone selection positions. At all times, the setpoints displayed
will be the temperature range that the system will maintain.
This mode can also be used to maintain entire home at 1 constant
temperature-typically when unoccupied.
NOTE: If Fan Switch is set to ON, fan will continue to run in
vacation mode.
To enter vacation mode, turn selector dial to VACATION. The
word "VACATION" will appear on controller display whenever
system is in this mode. Set vacation mode setpoints.
Setting The Clock
The clock display will normally show hour, minutes, AM or PM,
and day.
1. Set minutes.
Press SELECT MIN/HR/DAY button once.
Press ADVANCE TIME/DAY button to scroll to proper
minutes.
2. Set hour.
Press SELECT MIN/HR/DAY button once again.
Press ADVANCE TIME/DAY button to scroll to proper hour,
AM or PM.
3. Set day.
Press SELECT MIN/HR/DAY button once again.
Press ADVANCE TIME/DAY button to scroll to proper day.
4. Return to normal operation.
Press SELECT MIN/HR/DAY button once again. The newly
programmed time will be displayed.
Programming Schedules
1. Enter Program Mode
Press SET TIME/TEMP SCHEDULES button to enter pro-
gram mode. The program mode and current zone will be
shown on controller display.
2. Select a zone.
Turn rotary switch to the zone to be programmed.
3. Select a weekly period.
The clock display will show MTWTHF.
Pressing ADVANCE TIME/DAY button selects weekly pe-
riod to be programmed.
Pressing button 1 time will change clock display to SA.
A second press will change display to SU.
A third press returns display to MTWTHF.
4. Program time periods.
There are 4 start times that can be programmed in each weekly
period.
Press SELECT MIN/HR/DAY button to program start times
for selected weekly period.
Pressing SELECT MIN/DAY/HR button once shows first
program start time on clock display and setpoints, with the
word PROGRAM for this start time on controller display.
Additional presses display start times 2, 3, 4, and then back to
weekly period display.
NOTE: While in program mode, if a period of 4-1/2 minutes
passes without a change to some value, the controller will return to
normal operation.
5. Program start time
NOTE: Start times must be programmed in chronological order
and must be in the same day. Any times before previous time
period will be ignored. In the WRONG example below, periods 2
and 4 will be ignored.
RIGHT 6 AM - TIME PERIOD 1
8 AM - TIME PERIOD 2
5 PM - TIME PERIOD 3
9 PM - TIME PERIOD 4
WRONG 6 AM - TIME PERIOD 1
2 AM - TIME PERIOD 2
9 PM - TIME PERIOD 3
5 PM - TIME PERIOD 4
Table 9—Example Weekly Schedule
WEEKDAYS SATURDAY SUNDAY
6AM 72/70 7 AM 72/68 8 AM 72/70
8AM 85/65 10 AM 85/65 10 AM 85/65
5PM 70/68 2 PM 70/68 7 PM 70/68
10 PM 85/65 11 PM 85/65 10 PM 85/65
WEEKLY PERIOD
Start Time Cooling Setpoint/Heating Setpoint
15