Owner's Manual
PROGRAMMABLE DIGITAL THERMOSTAT
53DFS250-FS
©
©
[]
[]
-q Liquid Crystal Display
with Thermoglew TM Backlight
[_ Up/Down Buttons
[]Mode Button
F4] Override Button
Fq Heat or Cool Indicator
Heat = Red, Cool = Green
[_Ternperature Sensor Bubble
I1€1,'1_Bill [_
FRONT PANEL 1
DISPLAY 1
QUICK START Set the clock and go 2
BASIC OPERATION 2
PROGRAMMING Occupied and
Unoccupied Periods 3
ADVANCED SETUP 4
ABOUT ADVANCED FEATURES
AND OPERATION 5
WARRANTY 7
IMPORTANT: Follow Installation Instructionsbefore proceeding.
CAUTION: SETTHERMOSTATTO MODE "OFF"
PRIOR TO CHANGING SETTINGSIN SETUPOR
RESTORING FACTORY DEFAULTS,
7-Day Programmable
3 Occupied periods and 1 Unoccupied period
Auto Changeover
Large, Easy To Read Display
Thermoglow TM Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, IAQ Feature
Meets California Title 24
.... 2
I _,I |1|11A Sta []
__ "U U Pm ISt°p IIII
[_SuMoTuWeThFrSa-Setup r_,,, w,_,,,
[_ sled123 o ,COOL,
LOCKea
un_ _ Override
[_ Outside []
_On_ ONOFF
_[_ HEAT _- []
E_ Mode Indicators
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.
r_ Clock with of the Week
Day
Indicates the current time and day. This clock is also
used to program the timer periods. See page 2.
['3-] Room Temperature Display
Indicates the current room temperature.
[4-] Desired Set Temperature
Indicates desired room temperature(s). See page 2.
[5] Override Indication
Indicates the current program is currently being over-
ridden for up to 4 hours. See pages 2 and 5.
E_] Occupied or Unoccupied
Indication
Indicates the program number: Occupied 1,2, 3, or
Unoccupied. See pages 3 and 4.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No 535-328 Printed in U.SA Form OM53-3 Pg 1 11-04 Replaces: New
F_I Setup Indication
indicates the thermostat is in the programming mode.
See page 4.
F'81Fan Operation -- Speed
Indication 3
Fan -- indicates constant continuous fan operation.
3 speed indicators appear as:
1 bar m = low speed
2 bars ml = medium speed
3 bars roll = 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.
E_] Locked indication
Locked appears after the right combination of buttons
are pressed, rendering the buttons inoperative.
See page 5.
E_] Start/Stop indication
Start or Stop appears when programming timer
functions. See page 3.
Eli Outside Indication
Indicates the temperature displayed is from the
optional outside sensor. See page 6.
During Setup and
S_ Press the Mode button. Programming:
MODE
While hotdmg the Mode, Pressing the Mode but-
press the Override button ton selects different
OVERRIDE O for2 Seconds to enterSetup flashing items. (Repre-
screens, sented in dark black).
Pressing the Up and
t2:OL1 _ Down buttons wiil
Pm _ modify the flashing
selection.
To adjust the
clock or Day use
buttons.
Press both Mode and MODE ( )
Override buttons as
above to return to
norma! operation. OVERRIDE
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 Occu-
pied/Unoccupied periods section.
NOTE: The thermostat is not programmed to operate
heat pump systems.
Select Mode
The HEAT setting indicates
the temperature the room has
to reach before the unit will
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.
AUTO will automatically
select heat or cool based on
room temperature demand.
Program On will activate the
stored timer operation.
(Occupied and Unoccupied
periods.)
OFF indicates the system is
turned off.
_ _ _;# HEAT
Sg
72
AUTO
HEAT
U Sg
uno_upJed
_ © COOL
NE,M
OFF
Select Desired Temperature
In any mode, adjust the
desired Set Point TerTiperature
with
77
NEAT
buttons.
Pressing the up/down buttons in Auto mode will adjust both the
heat and cool set point temperat_simultaneously.
Pressing the up/down buttons in Heat or CooI modes will adjust
only the heat or coot set point temperaTUre.
Override
Press
OVERRIDE 0
I '*t • _"1tl
_ =_.IU PrnStop 0_.
s_ 03
unoccupied
ocoo
ProgramOn
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 wilt 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.
Page 2
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
On
Select Occupied 1 to run
on this day (On), or not to __,:i_i i
run this day (Off).
ON
Off
Yes
hl¢l
IlL!
We
Select Yes or No to copy
the previous day's I _ 1_/ program to this day.
LI.,I o,J
No I ii
Selecting Yes, then pressing mode will copy the previous day's program
and then will ask the same copy question again If yes is setected each
time, this routine will repeat until Saturday is copied to Sunday After Satur-
day is copied to Sunday, the copy command is unavailable.
ft no is selected, as in previous steps, flashing prompts for input will appear
for start and stop times for Occupied 1. If more than one occupied period
was selected in Step 1 on page 3, then cool/heat set points, and start/stop
times for additional occupied periods will be prompted.
PROGRAMMING NOTES
• If only one Occupied period is selected in Step 1 on
page 3, Occupied 2 and 3 programming steps are
skipped. Further, if only 2 occupied periods are
selected, Occupied 3 programming steps are
skipped.
• Heat and Cool set points for Occupied 1 are the
same for every day of the week. Heat and Cool set
points for Occupied 2 and 3 can be adjusted differ-
ently for weekdays and weekends, if desired.
• If the start time is set later in the day than the
stop time, the program will run from the start time
to midnight and from midnight to the stop time on
the same day. For example: 9:00pm start, 8:00am
stop, on Monday, In this example the program will
run from 12:00am Monday to 8:00am Monday and
again from 9:00pm Monday to 12:00pm Monday,
• The Unoccupied settings take effect at all times
when: (1) the program is on and (2) the current time
is outside a preset occupied period. For this reason
start and stop times are not necessary for
unoccupied.
• If the same start and stop times are programmed in
for an occupied period, then it will run 24 hours.
• If one occupied period starts and stops within
another occupied period the lower occupied num-
ber has priority. For example: If Occupied 3 is pro-
grammed to be "on" 24 hours, and Occupied 2 is
programmed to run that day, then Occupied 2 set-
tings will take over from Occupied 3 between
Occupied 2 start and stop times.
'_ Press the Mode button
MODE While holdtng the Mode,
press the Override button
for 10 seconds to enter
OVERRIDE Setup screens
Adiust the time of day
clock,
Tip To change hours quickly, press and
hoedthe override bulton in and press
the up or duwn buttons
NOTE Each step number is located at
the top tight corner of the disiay
for easy reference
/
Select the day of the
week.
Select fan operation,
Fan dl or Fan Auto.
I!I = Low Speed Fan= Medium Speed Fan
III= High Speed Fan
On
?y selectHea Poopoooro.
AUTO
Adiust the deadbend
from 1 to 6 degrees F.
Fan
Adiust the minimum
difference between
cooling and heating
_ sel points.
(0 _ to 6 F)
J_
3
(_ Select the cycles per
hour limit.
d=cycles per hour
limit defeated.
dl =d + defeat 5 rain.Compressor lockout.
(d, dl, 2- 6)
Select the security level:
O=no security in effect
_/) 1=set point range limited2=1 + program on all times
3=2 + prohibits set point
changes
J
(_ Adjust the maximum
alowable heat set point
when security is in effect.
(Step 8 only appearsif Step 9 is not 0.)
(35 tO 99 F)
M
M
OFF
Page 4
L'Yl_ I[,."15"1!1_
(_ Adjust the minimum
allowable cool set point
when security is in effect.
(Step 10 only appears
if Step 8 is not 0.)
(35 to 99 F)
LU
_) C
Select thermostat
operation in degrees
j) Fahrenheit or Centigrade.
F
F
On
(_ Select the display back-
light always On, or Off
after 8 seconds.
off
ON
_'nR
U,UU
(_ Adjust the preoccupancy
_j) O:O0= off
Select the unit ID for
'Soft Start'. This is used
in multiple installs to
stagger equipment turn I_
on times. 0 = off.
Each increment = 30 second delay.
(0 to 99) P.dl_l
Select the sensor type:
Yes = Outside or Duct
sensor
No =Automatic Detectionof Remote Sensor
No
To view Outside or Duct temperature
press and hold Mode 2 seconds, rain.
The thermostat will not control to Outside or Duct Sensors.
Outsi@
Press
MODE O
OVERRIDE O
Press the Mode button, While holding the Mode,
press the Override button leave the Setup screens.
ff no buttons are pressed, the display will leave the
set screens after 30 seconds.
STEP NO,
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Advanced Setup Table
DESCRIPTION RANGE FACTORY
DEFAULT
Time of day clock set 24 hour 12:00 Am
Day of the week Su - Sa Mo
Fan Mode Auto / d| Auto
Heat Pump On or Off Off/On Off
Deadband or Temperature swing 1 - 6 2
Forced minimum difference 0 - 6 2
heat/coot
Cycles per hour d, dl, 2 - 6 6
Security Levets 0 - 3 0
Maximum allowable Heat set point 35- 99 F 80 F
Minimum allowable Coot set point 35 - 99 F 65 F
Fahrenheit or Centrigrade F / C F
Thermogtow TM Backlight Off / On On
Fan Purge timer 0:00 - 3:00 0:00
Soft Start 0 - 99 0
Remote Sensor Yes / No No
• CLOCK BACKUP -- In the event of a power loss,
the thermostat internal clock will continue to keep
proper time for a minimum of 48 hours without
external power or batteries.
• MINIMUM HEAT/COOL SET POINT DIFFERENCE
-- The Heat and Cool set points will not be allowed
to come any closer to each other than the value set
in Advanced Setup Step 6, on page 4. This mini-
mum difference is enforced during Auto changeover
and Program On operation.
• ENERGY SAVING SMART FAN -- If Fan On is
selected, the fan will run continuously at all times. If
fan is in Off Mode it will only run if there is a heating
or cooling demand during programmed unoccupied
periods.
• OVERRIDE -- As explained on page 2, pressing
the Override button during a programmed, Unoccu-
pied period will force the thermostat into Occupied
1, temporarily, up to 4 hours. If the Override button
is pressed during an Occupied period, the thermo-
stat will be forced into Unoccupied and the occu-
pied period (1,2 or 3), it was forced out of will be
turned off, only for that day.
• During Override periods the set points may be
adjusted, but they will not be remembered after
Override ends.
• FAN PURGE TIMER -- When this feature is acti-
vated, the fan will turn on during Unoccupied at a
preset amount of time prior to Occupied 1. This pre-
occupancy fan purge timer may be set as instructed
on this page, Step 13,from 0 to 3 hours. 0 = this
feature turned off.
• KEYPAD LOCK -- To prevent unauthorized use of
the thermostat, the front panel buttons may be dis-
abled. To disable, or 'lock' the keypad, press and
hold the Mode button. While holding the Mode but-
ton, simultaneously press the Up and Down but-
tons. Locked will appear on the display.
Press all 3 for _) Locked
Keypad Lockout _ "--_
To unlockthe buttons, again press and hold the
Mode button. While holding the Mode button, simul-
taneously press the Up and Down buttons. Locked
will disappear from the display.
DRY CONTACT SWITCH -- The terminals are
'normally open'. Closing or completing the circuit
will cause the thermostat to enter Occupied 1. This
feature allows an external device such as a central
time clock, occupancy sensor, or a telephone-
activated device to force one or more thermostats
into Occupied 1. For the Dry Contact to work the
thermostat must be in Program On. Set Occupied
1 to Offforall 7days, so the Contact closure will be
in control. When the thermostat is forced into Occu-
pied 1 via the Dry Contact closure, the icon
Occupied 1 will blink.
CK1
GND
Page 5
HOLIDAY MODE -- This feature forces the thermo-
stat into Unoccupied for a preset duration, up to
99 days. The Holiday setup display is entered as
follows:
MODE O
4,
A
?Y
Press the Mode button. While holding Mode, press the Up
button for 2 seconds to enter the time period programming
setup
The first step on the display prompts for maximum number of
Occupied periods ignore this prompt and press the Override
button.
HOI
When active tile
display counts
down remaining
days blinking.
LI Unoccupied also
appears
Press the Up or Down buttons to select the number of days
the thermostat will be in Holiday mode. O = Off. To exit Holiday
setup, press the Mode button.
The thermostat will enter the Holiday mode when
the clock crosses midnight.
During Holiday mode Unoccupied set points are
enforced.
The Override button is active during Holiday mode.
It will override to Occupied 1 settings up to 4 hours
then return to Holiday mode. The Dry Contact
Switch is ignored.
The thermostat will exit Holiday mode at midnight of
the final programmed day. To terminate Holiday
immediately, enter the Holiday setup screen and
select 0.
SOFT START -- This feature is utilized in multiple
thermostat installations controlled by the Dry Con-
tact terminals. Assigning a unique Soft Start num-
ber to each thermostat will stagger the turn on
times, even though the Dry Contact closes for all
the thermostats connected at the same time. Each
Soft Start number represents a multiple of 30 sec-
onds from the Dry Contact closure. For example,
1 = turn on 30 seconds after Dry Contact closure,
2 = turn on 60 seconds after closure, 3 = turn on
90 seconds after closure, and so on. See page 5,
Step 14, to configure the thermostat for Soft Start.
DUAL SETPOINT BEHAVIOR -- The adjustable
set point range is: 35 to 99 degrees in Fahrenheit
and 7 to 35 degrees in Centigrade. When in the
modes Heat or Cool, this adjustable range is
unhampered.
When adjusting any Auto mode, including program-
ming Occupied and Unoccupied periods, the ther-
mostat will not allow the Heat set point to get closer
to the Cool set point than the value programmed as
the minimum difference in Step 6, page 4.
When entering the Auto mode from Cool, the Heat
and Cool set points will remain spread apart by the
amount that they were adjusted, prior to entering
Auto.
For example: If the Cool set point was set to 80
while in the Cool mode and the Heat set point was
adjusted to 70 while in the Heat mode, upon enter-
ing the Auto mode the Heat and Cool set points
would be 80 and 70. Both set points would then
move up and down together, (in this example
spread by 10 degrees), by pressing the up or down
buttons.
To move the Heat and Cool set points closer
together, enter the Cool or Heat mode by pressing
the Mode button, then adjust the set point(s) closer
together. Heat is limited to how close it can come to
Cool by Step 6, page 4.
REMOTE SENSORS (Optional Accessory) --
When connected to terminals RS+5, RS, and GND
on the back of the thermostat, the thermostat will
read the temperature from the Remote Sensor and
ignore the temperature sensor inside the thermo-
stat. The thermostat automatically recognizes when
a Remote Sensor is connected. When reading the
temperature from the remote, the degree icon
above the room temperature blinks once a second.
Optionam_mm,,li mm_
Remote Sensor
Optional Sensor
The Override button on
the Remote Sensor
works slightly different
than the Override button
on the front panel. Each
press of the 'External'
Override button adds
2 hours to the override
timer, if the timer was
already active, the first button press will round the
runtime to either 2:00 or 4:00.
Subsequent button presses will not wraparound as
the Override button on the thermostat does, so the
second or greater button press will set the runtime
to 4:00. The Locked feature has no effect on the
external Override button. The wired Remote Sensor
is connected to the thermostat with up to 500 ft of
20 ga. or 300 ft of 18 ga. thermostat wire. See the
Remote Sensor instructions for further details.
FACTORY DEFAULTS -- Before restoring factory
defaults, set thermostat to OFF mode. If, for any
reason it is desirable to return all stored settings
back to the factory default settings, press the Mode
button. While holding the Mode button in, press the
Down button for 2 seconds. All icons will appear.
Press and hold in the Override button until Fd
appears. This resets all factory settings. To cali-
brate room temperature, press the Mode button
once more. At this point use the Up and Down
buttons to calibrate room temperature, if needed.
Press the Mode button to return to normal
operation.
Page 6
|YlY_lli_1iTILv
One-Year Warranty -- This Product iswarranted to be free from defects in material and workmanship. If it appears within
one year from the date of original installation, whether or not actual use begins on that date, that the product does
not meet this warranty, a new or remanufnctured part, at the manuf_cturer's sole option, to replace any defective part
will be provided without charge for the part itself; PROVIDED the defective part is returned to the distributor through a
qualified servicing dealer.
THISWARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing, repairing, removing, installing,
shipping, servicing or handling of either defective parts or replacement parts. Such costs may be covered by a sepa-
rate warranty provided by the installer.
THISWARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION LOCATION AND BECOMES VOID UPON
REINSTALLATION.
LIMITATIONS OF WARRANTIES -- ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF FITNESSFOR A PARTICU-
LAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED WAR-
RANTY ISGIVEN. SOME STATESDO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS,SO THE ABOVE
MAY NOT APPLY TO YOU. THEEXPRESSEDWARRANTIES MADE IN THISWARRANTY ARE EXCLUSIVE AND MANY NOT BE
ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR,DEALER, OR OTHER PERSON WHATSOEVER.
ALL WORK UNDER THETERMS OF THISWARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS. ALL
REPLACEMENT PARTS,WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIRWARRANTY PERIOD ONLY THEREMAINING
TIME PERIOD OF THISWARRANTX4
THEMANUFACTURER WILL NOT BE RESPONSIBLEFOR:
1. Normal maintenance as outlined in the installation and servicing instructions or owners manual including filter clean-
ing and/or replacement and lubrication.
2. Damage or repairs required as a consequence of f_-_ultyinstallation, misapplication, abuse, improper servicing,
unauthorized alteration or improper operation.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to the inade-
quacy or interruption of electrical service.
4. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or other conditions beyond the
control of the Manuf_-_cturer.
5. Parts not supplied or designated by the Manufacturer, or damages resulting from their use.
6. Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and Canada.
7. Electricity or fuel costs or increases in electricity or fuel costs from any reason whatsoever including additional or
unusual use of supplemental electric heat.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY NATURE WHATSOEVER.
Some states do not allow the exclusion of incidental or consequential damages, so the above may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which may vary from state to state.
Page 7
Copyright 2004 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 535-328 Printed in USA. Form OM53-3 Pg 8 11-04 Replaces: New
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