Carrier 53DFS250-FS User Manual
Owner's Manual
PROGRAMMABLE DIGITAL THERMOSTAT
53DFS250-FS
Front Panel
I 1 [Liquid Crystal Display
m Up/Down Buttons
m Mode Button
m Heat or Cool Indicator
___
I 6 [Temperature Sensor Bubble
with Thermoglow™ Backlight
Override Button
Heat = Red, Cooi = Green
Table of Contents
FRONT PANEL
DISPLAY
QUICK START Set the clock and go
BASIC OPERATION
PROGRAMMING Occupied and
Unoccupied Periods
ADVANCED SETUP
ABOUT ADVANCED FEATURES
AND OPERATION
WARRANTY
7-Day Programmable
3 Occupied periods and 1 Unoccupied period
Auto Changeover
Large, Easy To Read Display
Thermoglow™ Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, lAC Feature
Meets California Title 24
Display
-Q
Cool
Locked
Override
j-E
AUTO
Outside
ONOFF
Heat
00
00
m Mode Indicators
1
1
2
2
[~2~| Clock with Day of the Week
3
4
5
7
m Room Temperature Display
0 Desired Set Temperature
[1 Override Indication
Selects the operation mode of the equipment.
HEAT — indicates the heat mode.
COOL — indicates the air conditioning mode.
AUTO — indicates the system will automatically
changeover between the heat and cool
modes as the temperature varies.
OFF — indicates the entire system is turned off.
PROGRAM ON — indicates the stored program is
enabled to run. See page 2.
Indicates the current time and day. This clock is also
used to program the timer periods. See page 2.
Indicates the current room temperature.
Indicates desired room temperature(s). See page 2.
Indicates the current program is currently being over
ridden for up to 4 hours. See pages 2 and 5.
n.
-S
IMPORTANT: Follow Installation Instructions
before proceeding.
A CAUTION: SET THERMOSTAT TO MODE "OFF'
PRIOR TO CHANGING SETTINGS IN SETUP OR
RESTORING FACTORY DEFAULTS.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tata 3e 2f
Catalog No. 535-328 Printed in U.S.A. Form OM53-3
Occupied or Unoccupied Indication
Indicates the program number: Occupied 1, 2, 3, or
Unoccupied. See pages 3 and 4.
Pg 1
11-04 Replaces; New
Display
Setup Indication
□
Indicates the thermostat is in the programming mode.
See page 4.
Fan Operation Indication — 3 Speed
Fan — indicates constant continuous fan operation,
3 speed indicators appear as:
1 bar ■ = low speed
2 bars il = medium speed
3 bars ill = high speed
When Fan is not lit — indicates the fan is in Auto
mode. The fan will operate at the speed which will
help meet room temperature conditions. See page 4.
Basic Operation
Select Mode
The HEAT setting indicates
the temperature the room has
to reach before the unit wit!
turn on to heat the room.
The COOL setting indicates
the temperature the room has
to reach before the unit will
turn on to cool the room.
I if
1 é . li ti Prr:
111
HEAT
S3
7?
Locked Indication
Locked appears after the right combination of buttons
are pressed, rendering the buttons inoperative.
See page 5.
10
Start/Stop Indication
Start or Stop appears when programming timer
functions. See page 3.
11
Outside Indication
Indicates the temperature displayed is from the
optional outside sensor. See page 6.
Quick Start Set the Clock and Go
During Setup and
Programming:
Pressing the Mode but
ton selects different
flashing items. (Repre
sented in dark black).
Pressing the Up and
Down buttons will
modify the flashing
selection.
To adjust the
clock or Day use
buttons.
MODE
OVERRIDE o
iP'fifh
I S» ■
Press both Mode and mode
Override buttons as
above to return to
normal operation. OVERRIDE
Press the Mode button.
While holding the Mode,
press the Override button
for 2 Seconds to enter Setup
screens.
o
o
The thermostat is preprogrammed from the factory to
operate without the need for further programming. To op
timize the installation of this thermostat, follow the in
structions in the Advanced Setup section, or in the Occupied/Unoccupied periods section.
NOTE: The thermostat is not programmed to operate
heat pump systems.
AUTO will automatically
select heat or cool based on V
room temperature demand.
Program On will activate the
stored timer operation.
(Occupied and Unoccupied
periods.)
OFF indicates the system is
Select Desired Temperature
I J “ n ff «S *81
I L H Lf y ;'ìr; f
Pressing the up/down buttons in Auto mode will adjust both the
heat and cool set point temperatures simultaneously.
Pressing the up/down buttons in Heat or Cool modes will adjust
only the heat or cool set point temperature.
Override
turned oft.
I LI
( re ft ft
t IL w y y Pm Slop or
Su
o
OVERRIDE f
unoccupied _
rr
i'll
U Jl
t Zi ■ r$ n r.
I C .u U
n • Il
you
O COOL
on
COOL
HEAT
cc
nn
IH
Override
Î3
a
I
ProgramOn
If?
■ . ■ CIOOL
m m M AUTO
■ HEAT
ProgramOn
OFF
In any mode, adjust the
desired Set Point Temperature
During programmed, unoccu
pied periods pressing the
Override button will force the
thermostat into Occupied 1
comfort settings, temporarily.
With each successive push of
the Override button, the over
ride timer will add 30 min
utes, until the maximum of
4 hours is reached. Then the
next press will zero out the
override timer, returning to
unoccupied if there are no
further button presses.
When in Override, the Over
ride icon and the Occupied 1
icon appear on the display.
The time of day clock alter
nates with the time remaining
in override.
During Override, the set
points are adjustable, provid
ed the keypad is not locked.
with
Page 2
Programming Occupied and Unoccupied
Periods
Important — 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.
Press the Mode buttofi. While hoiding the Mode button,
press the Up button for 2 seconds to enter time period
programming.
o
Select the meximum number
of occupied periods To be
used on any one day.
(1,2or3)
Seiect the day for
Occupied 1.
(Mo - Su)
ñ r<Am
Adjust the start time
for occupied 1.
Adjust the stop time
for occupied 1.
On
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Off
Yes
Select Yes or No to copy
the previous day's
program to this day.
I. u u
C ■ il n
U ■ U UI
The copy command becomes avaiiabie 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.
HI]
n,
LI
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 win repeat until Saturday is copied to Sunday. After Saturday is copied
to Sunday, the copy command is unavailable.
Adjust the cooling
set point for occupied 1.
(35 to 99 F)
Adjust the heating
set point for occupied 1.
(35 to 99 F)
IS'
V
Adjust the cooling
set point tor unoccupied
periods.
(35 to 99 F)
Adjust the heating
set point tor unoccupied
periods.
(35 to 99 F)
NOTE: tf no Unoccupied Mode wiil be used, press the Mode button and pro
ceed to the next step.
COOL
zo
Select the day
for Occupied i.
(Tu - Mo)
Adjust the start time
for occupied 1.
Adjust the stop time
for occupied 1.
0 " n Tf Am
Z(. u u
c ■ n n„
Page 3
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