Installation and User Guide
20
Part No. 37-7760003
09-2018 18-HD48D1-1A-EN
circulation even when the heating and cooling equipment
is not cycling.
8.8 Choose the System Setting
(Cool, Off, Heat, Em, Auto)
Press the SYSTEM key to select:
Cool: Thermostat controls only the cooling system.
Off: Heating and Cooling systems are off.
Heat: Thermostat controls only the heating system.
Em: Setting is available only when the thermostat is configured
in HP1 or HP2 mode.
Auto: Auto Changeover is used in areas where both heating
and cooling may be required on the same day.
AUTO allows the
thermostat to automatically select heating or cooling depending
on the indoor temperature and the selected heat and cool
temperatures. When using
AUTO, be sure to set the Cooling
temperatures more than 1° Fahrenheit higher than the heating
temperature.
8.9 Manual Operation for
Non-Programmable Mode
Press the SYSTEM key to select
“Heat” or “Cool” and use
the keys to adjust the temperature to your desired setting. After
selecting your desired settings you can also press the SYSTEM
key to select
AUTO to allow the thermostat to automatically
change between
“Heat” and “Cool”.
8.10 Manual Operation (Bypassing
the Program) Programmable Mode
Manual operation will bypass the program and allow you to
adjust the temperature as you desire. The temperature you set
in Hold will be maintained indefinitely. Press
or
to adjust
the temperature. The HOLD key will appear. Press the HOLD
key. “Hold At” will appear next to the set point temperature and
the thermostat will maintain the new set point temperature until
Run Schedule is pressed to resume program operation.
8.11 Program Override
(Temporary Override)
Press
or
keys to adjust the temperature. This will override
the temperature setting for a (default) four hour override period.
The override period can be shortened by pressing or
lengthened by pressing . Program Override period can range
from 15 minutes to 7 days.
Example: If you turn up the heat during the morning program,
it will be automatically lowered later, when the temporary hold
period ends. To cancel the temporary setting at any time and
return to the program, press
Run Schedule.
If the SYSTEM key is pressed to select
AUTO the thermostat
will change to “
Heat” or “Cool”, whichever ran last. If it switches
to “
Heat”, but you want “Cool”, or it changes to “Cool”, but you
want “
Heat”, press both keys simultaneously to change to the
other mode.
9. Programming
9.1 Set Current Time and Day
1. Press Menu key to enter installer menu. Then press Set
Time once to indicate hour & AM or PM designation in
clock display.
2. Press and hold either the or touch key until you
reach the correct hour and AM or PM designation.
3. Press Set Time again to display minutes only in clock
display.
4. Press and hold either the or touch keys until you
reach the correct minutes.
5. Press Set Time once again to display year.
6. Press either the or touch key until you reach the
correct year.
7. Press Set Time once again to display month.
8. Press either the or touch key until you reach the
correct month.
9. Press Set Time once again to display date of the month
along with day of the week at top row (which is automatic).
10. Press and hold either the or touch key until you
reach the correct day of the month and day of the week
displayed at the top row.
11. Press Run Schedule once or twice to remove the key.
Now the display will show the correct time and room
temperature.
9.1.1 Automatic Daylight Saving
Calculation
The Real Time Clock will adjust automatically for daylight savings
time, in the following manner:
Increment one hour at 2 AM on the second Sunday of March and
decrement one hour at 2 AM on the first Sunday of November.
The daylight saving feature can be enabled or disabled in installer
configuration menu. Default is
DS ON (enabled).
After entering installer configuration mode, momentarily press
touch key until the display indicates dS (in actual temperature
digits) and on (default – in clock digits). and keys will toggle
display and operation from on to OFF.
9.2 Programming Tip: Copy Program
1. When programming your thermostat, you may copy the
program from one day to another day or group of days using
the Copy key. In 7 day programming mode, a day can be
copied to another day or all six other days. In 5+1+1 day
programming mode the weekday (Mon – Fri) program can
be copied into Sat and Sun or either Sat or Sun.
2. To copy a program from one day to another:
3. In Set Schedule mode, enter the program for the day or
select the day you wish to copy by pressing Advance Day.
4. Press Copy. The display will show “Copy” next to the
SYSTEM key and the day of the week that will be copied.
5. Press Advance Day. The day being copied will be indicated
and the other days will be flashing.
6. If you wish to copy to all days skip to next step or press
Advance Day until the day you wish to copy to is flashing.
7. Press Copy. “Copy” will disappear, the day you copied from
will disappear and the day (s) you copied to will be on.
8. If you wish to copy this same program into other days, press
Copy and repeat steps 3, 4 and 5.
9. Press Run Schedule to return to normal operation.
10. Fill in the blank schedule provided and then:
