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Carrier PROGRAMMABLE DIGITAL THERMOSTAT 53DFS250-FS Owner's Manual page 3

Programmable digital thermostat

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Important
i
Before you Begin
When using unoccupied modes, Auto fan speed must be
selected. Manual fan speed should not be used for unoc-
cupied operation. Auto Fan speed must be used to pre-
vent the system from entering the coil freeze protection
cycle or in heating, the high-pressure protection cycle.
(See Advanced Setup section for fan speed selection.)
If different heating and/or cooling temperature set points
are desired Monday through Friday at different times of
the day, two occupied periods must be programmed. To
adjust set points and times for the two occupied periods:
If the space to be controlled should have a designated
temperature from 7:00 a.m. to 5:00 p.m. Monday through
Friday and for the remainder of the day have an alternate
or setback temperature set point set to stop at 5:00 p.m.,
program the Occupied 2 mode at 12:00 a.m. to
12:00 a.m. at the alternate temperature set point.
NOTE: If one occupied period starts and stops within
another occupied period the lower occupied number has
priority.
If additional setback is desired for Saturday and Sunday,
program Occupied 1 from 12:00 a.m. to 12:00 a.m. for
both Saturday and Sunday at the desired temperature.
Pross the Mode button.
While holding the Mode button,
press the Up button for 2 seconds
to enter time period
MODE O
programming.
Select the maximum
number
of occupied
periods to be
(_
used on any one day.
(1,2 or 3)
_)
Adjust the cooling
set point for occupied
1.
_j)
(35 to 99 F)
Adjust the heating
(_
set point foroccupied
1.
(35 to 99 F)
(x(
HEAT
12
Adjust the cooling
_f,_l
set point for unoccupied
COOL
(_
pedods.
(35 to 99 F)
Adjust the heating
(_
set point for unoccupied
HEAT
periods.
_,
(35 to 99 F)
_
NOTE: If no Unoccupied
Mode witl be used, press the Mode button and pro-
ceed to the next step.
,//"
,\
Select the day for
i
Occupied 1.
(Mo - Su)
I • t=l M
Adjust the start time
for occupied
1.
Adjust the stop time
_ • _1 _l Pm
i
for occupied 1.
On
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Off
ON
The copy command
becomes
avail-
able after the maximum
number of
occupied periods
are programmed
in
a day. This example uses 1 as the
maximum
occupied
periods ever pro-
grammed
in one day.
Select Yes or No to copy
_ I_
the previous
day's
I I &!
program
to this day.
Tu
NO
t'N
LU ou
Selecting
Yes, then pressing Mode will copy the previous day's program
and
then will ask the same copy question
again. If yes is selected
each time, this
routine will repeat until Saturday is copied to Sunday. After Saturday is copied
to Sunday, the copy command
is unavailable.
Select the day
Tu
for Occupied
t.
(Tu - Mo)
2i .uu
Adiust the start time
for occupied
1.
• U U Pm
I
Adjust the stop time
for occupied
I.
Page 3

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