Carrier 53DFS250-SL User Manual

Owner's Manual

PROGRAMMABLE DIGITAL THERMOSTAT

53DFS250-SL

Table of Contents

DISPLAY
QUICK START Set the clock and go
BASIC OPERATION
PROGRAMMING Occupied and

Unoccupied Periods

ADVANCED SETUP
ABOUT ADVANCED FEATURES

AND OPERATION

WARRANTY

IMPORTANT: Follow Installation Instructions

before proceeding,

A CAUTION: SET THERMOSTAT TO MODE "OFF"

PRIOR TO CHANGING SETTINGS IN SETUP OR
RESTORING FACTORY DEFAULTS.

2
2

3

3
4

5
7

7-Day Programmable
3 Occupied Modes, 1 Unoccupied Mode
Auto Changeover
Large, Easy To Read Display
Thermoglow™ Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, lAQ Feature
Meets Caiifornia Titie 24

Backlit LCD Display

- Warmer or + Button

■ Cooler or - Button

- Overrirte Button

■ Heat or Cool indicator

Red = Heat, Green = Cool

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4
Tab 3e 2t

Catalog No. 535-329 Printed in U.S.A. Form OM53-4 Pg 1 11-04 Replaces: New

Display Quick Start Set the Clock and Go

During Setup and Programming:
Pressing the Mode button selects different flashing items

(represented in black).
Pressing the Up and Down buttons will modify the flash

ing selection.

Press the Set Clock button
to exit Setup screens.

■O

IJ‘nn

» t .ULIPm

Press the Set Clock button
to exit Setup screens.

The thermostat is preprogrammed from the factory to op
erate equipment without the need for further program
ming. To optimize the installation of fhis thermosfat follow
the instructions in the Advanced Setup section.

NOTE: The thermostat is not preprogrammed from the
factory to operate heat pump systems. To control these
systems, follow the steps in the Advanced Setup section,
page 4.

B-

B­B

Q]

m

Q]
Q]

SuMTuWThFSa ^unoccupied

AUTO

OFFON

- Locked

-Fan ill

Mode Indicators

Selects the operation mode of the equipment.

COOL — indicates the air conditioning

heat — indicates the heat mode.

AUTO — indicates the system will auto

OFF — indicates the entire system is
PROGRAM ON — indicates the stored

Clock with Day of the Week

Indicates the current time and day. This clock
is also used to program the timer periods.

See this page.

Room Temperature Display

Indicates the current room temperature.

Desired Set Temperature

Indicates desired room temperature(s).

See page 3.

Override Indication

Indicates the current program is currently be
ing overridden for up to 4 hours. See

pages 3 and 5.

nOn Setupjra

starti mi SJ

lied 123 flf fi

|2®5| ° COOL -

J1 HEAT-

00

mode.

matically changeover between
the heat and cool modes as the
temperature varies.

turned off.

program is enabled to
run. See page 3.

HB

HB

To adjust the

clock or Day use

buttons.

To adjust the

clock or Day use

buttons.

o

Occupied or Unoccupied Indication

ni

I 8 I Fan Operation Indication

[j] Locked Indication

Indicates the program number: Occupied 1,2,
3, or Unoccupied. See pages 3 and 4.

Setup Indication

Indicates the thermostat is in the program
ming mode. See page 4.

Fan III — indicates constant continuous
fan operation.

When Fan On Icon is not lit — indicates the
fan will only operate when necessary to heat
or to cool.

Locked appears after the right combination of
buttons are pressed, rendering the buttons
inoperative. See page 5.

To] Start/Stop Indication

Start or Stop appears when programming
timer functions. See page 3.

Page 2

Basic Operation

Programming Occupied and Unoccupied Periods

Select Mode

The HEAT setting indicates

the temperature the room has

to reach before the unit wiil

turn on to heat the room.

The COOL setting indicates

the temperature the room has

to reach before the unit wiil

turn on to cool the room.

AUTO will automatically

select heat or cool based on

room temperature demand.

Program On wilt activate the

stored timer operation.

(Occupied and Unoccupied

OFF indicates the system is

periods.)

turned off.

t 3 ■ fi rt

11 u !.

I 5 " ñ

I L U r:-

AUTO

Program<5n

unoccupied

H

COOL

HEAT

!S

Press the Program button fo enter
time period programming.

o

vSelect the maximum number
of occupied periods to be
used on any one day.
Typically 1.

{1,2 or 3)

Adjust the cooling
set point for occupied 1.

(35 to 99 F)

Adjust the heating
set point for occupied 1.

(35 to 99 F}

Adjust the cooling
set point for unoccupied
periods.

(35 to 99 F)

V

C

Zi

COOL

OFF

Select Desired Temperature

In any mode, adjusi the

13’' II n

w

COOL

desired Set Point Temperature

with

: ■■■'

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 Press

OVERRiDE

f* t i ÍÍ r\ i-loyin

i-.UiJFPm stop

i

K “ 1 n Program On

U -n llPm

ProgramOn

unoccupi^g

?S

f r<Tm

11 .UU Pm

^ o COOL

■ HEAT

I

Q COOL

cc

Z*Zl

Override

1?

During programmed, unoccupied
periods a press of the Override
button will force the thermostat
into Occupied 1 comfort settings,

temporarily.
With each successive push of the

Override button, the override tim
er will add 30 minutes, until the
maximum of 4 hours is reached.

HEAT

Then the next press will zero out
the override timer, returning to un
occupied if there are no further
button presses.

When in Override, the Override

icon and the Occupied f icon

appear on the display.
The time of day ciock alternates

with the time remaining in
override.

During Override, the set point
temperatures are adjustable, pro
vided the keypad is not locked.

Adjust the heating
set point for unoccupied
periods.

(35 to 99 F)

Select the day for
Occupied 1.

(M-Su)

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

1 ■ ri riAm

I. U U

C " n ñ

U.UUPm

ON

CO

Page 3

Programming Occupied and Unoccupied Periods

The copy command becomes available
after the maximum number of occupied
periods are programmed In a day. This
example uses 1 as the maximum occupied

Ves

Select Yes or No to copy
the previous day’s
program to this day.

No

periods ever programmed in one day.

hin

Mi!

rn,

L U P’i

Selecting Yes, then pressing Mode will copy the previous day’s program and
then wi!! 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.

A

Select the day
for Occupied 1.

Tu

V

Start

A

Adjust the start time
fui uuuupJitid 1.

rjtrr

Tu

C:x' '■

A

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 Occu
pied 2 start and stop times.

To program Occupied 2 and Occupied 3 modes

repeat programming steps for Occupied 1.

Advanced Setup

Steps 1 and 2 were performed on page 2. Advanced Setup
begins with Step 3.

NOTE: Each step number is heated at

Press the Mode buttorj.

D

While holding the Mode button,
press the Program button to
enter the Advanced Setup screens.

the top right corner of the dislay
for easy reference.

/

A

Adjust the stop time
for occupied 1.

¡■;

r

V

On

Select Occupied 1 to run

A

on this day (On), or not to

run this day (Off).

V
A

A

Selecting Yes, then pressing Mode will copy the previous day’s program and then will ask
the same copy question again. If yes is selecfed each time, this routine will repeat until Sat
urday is copied to Sunday. After Saturday is copied to Sunday, the copy command is
unavailable.

If 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.

Off

Yes

Select Yes or No to copy

the previous day's

program to this day.

No

PROGRAMMING NOTES

• If only 1 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 each day of the week, if desired.

• If the start time is set later in the day than the stop time, the program will run from the start time

ON

NlH

1 tu

w

rn

LU

I J

Select residential Heat
Pump, On or Off.

Adjust the deadband
from 1 to 6 degrees.

7

Adjust the minimum
d/ffsfsnes between
cooling and heating
set points.

Select the cycles per
hour limit.

d=cycles per hour

limit defeated,

d 1 =d + defeat 5 min.

Compressor tockout.

Select the security level:
0=no security in effect
1 =^set point range limiteo

2=11 program on all tim

3=2 f prohibits set point

Adjust the maximum
allowable heat set point
when security is in effect.

(Step 8 oniy appears if

Step 7 is not 0).

Adjust the minimum
allowable cool set point
when security is in effect.

(Step 9 only appears if

Step 7 is not 0).

{1 toeFj

i0to6F)

{d, d1, 2-6)

changes

(35 -99F)

(35-99F)

db

iilF

Cff

...J §n, 1«

0 n

0 u

IS

cc

Oh

J

1

L

c

0

Zi

J

L J

B

Page 4

Advanced Setup

Select thermostat
operation in degrees
Fahrenheit or Celsius.

C

f

Select the display back
light always On, or Off
after 8 seconds.

Adjust the preoccupancy
fan purge timer.
0 - 3 hours.
0:00 = off

Select the unit ID for
‘Soft Start'. This is used
in multiple installs to
stagger equipment turn
on times. 0 = off.
Each Number-(SOseconds)

second delay.

(0to99)

Press the Mode button. While holding the Mode, press the Program button
leave the Setup screens. If no buttons are pressed, the display will leave the
setup screens after 30 seconds.

Advanced Setup Table

STEP

NO.

1 Time of day clock set 24 hour 12:00 Am
2 Day of the week Su - Sa Mo
3 Heat Pump Off/On Off
4 Deadband or Temperature swing 1 -6 F 2 F

Forced minimum difference heat/

5

cool
6 Cycles per hour d, d1,2-6 6
7 Security Levels 0 - 3 0
8 Maximum ailowabie Heat set point 35 - 99 F 80 F
9 Minimum aiiowable Cool set point 35 - 99 F 65 F

10 Fahrenheit or Celsius F/C F
11 Thermoglow^'^^ backlight Off/On On

12 Fan Purge timer
13 Soft Start 0 - 99 0

DESCRIPTION RANGE

About Advanced Features and Operation

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.

TWO-STAGE OPERATION — The Second Stage of

heat (Heat pump models only) is turned on when
(1) the first Stage has been on for a minimum of two
minutes, and (2) the temperature spread from the
set point is equal to or greater than: the setpoint

temperature plus the deadband, plus 2 degrees.

Dead

2 degrees 2 degrees

3rd Stage 2nd Stage 1 st Stage

High yed Low

Band

/ / f \ \

''andStage tsfStage Heat Cool istStage

turnon turnon Set Point Set Point tumcn

fl-nn

u-yy

Dead
Band

2 degrees 2 degrees

ON

U

0 -6 F 2 F

0:00-3:00

min.

n

FACTORY
DEFAULT

0:00 min.

MINIMUM HEAT/COOL SET POINT DIFFERENCE
— The Heat and Cool set point temperature will not
be allowed to come any closer to each other than
the value set in Advanced Setup Step 5, on page 4.
This minimum difference is enforced during Auto
changeover and Program On operation.

ENERGY SAVING SMART FAN — It Fan On is
selected, the fan will run continuously at all times,
except in Off, and will only run if there is a heating
or cooling demand in Unoccupied periods.

OVERRIDE — As explained on page 3, 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 number (1,2 or 3), it was forced out of will be
turned off, only tor that day.

During Override periods the set point temperature
may be adjusted, but they will not be remembered
after Override ends.

HEAT — First Stage = Heat Pump. Second Stage =

Heat Pump and Electric Heat.

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 12, 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 in the Mode button. While holding the Mode
button in, press the Up and Down buttons in
together. The Locked icon will appear on the
display.

Press all 3 for

Keypad Lockout'

o

Locked

ON

8S

55

To unlock the buttons, again press and hold the

Mode button. While holding the Mode button in,
press the Up and Down buttons in together. The

Locked icon will disappear from the display.

DRY CONTACT SWITCH — The terminals are ‘nor
mally open’. Closing or completing the circuit will
cause the thermostat to enter Occupied 1. This fea
ture allows an external device such as a Central
Time Clock, Occupancy Sensor, or a Telephone
activated device to force 1 or more thermostats into
Occupied 1. For the Dry Contact to work the ther
mostat must be in Program On. Set Occupied 1

to Off for all 7 days, so the Contact closure will be in
control. When the thermostat is forced into
Occupied 1 via the Dry Contact closure, the icon

Occupied 1

will blink.

tJGND

CK1

Page 5

About Advanced Features and Operation

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:

©

When active
the display
counts down
remaining days
blinking.
Unoccupied also
appears.

Press the Up or Down buttons to select the
number of days the thermostat will be in
Holiday mode. 0 = 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,
no. 1 = turn on 30 seconds after Dry Contact clo
sure, no. 2 = turn on 60 seconds after closure,
no. 3 = turn on 90 seconds after closure, and so on.
See page 5, Step 13, to configure the thermostat for
Soft Start.

DUAL SET POINT BEHAVIOR — The adjustable
set point range is: 35 to 99 degrees in Fahrenheit
and 7 to 35 degrees in Celsius. 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

When entering the Auto mode from Cool, the Heat
and Cool set points will remain spread apart by the

Step 5, page 4.

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 point temperatures
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 point temperatures
closer together, enter the Cool or Heat mode by
pressing the Mode button, then adjust the set point
temperatures closer together. Heat is limited to how
close it can come to Cool by

Step 5, 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.

The Override button

3 _ on the Remote Sensor

works slightly different
than the Override but

LYiiuuiitJ

Optional

Remote Sensor

opiionai Sensor {Qp 2 houTS to the

ton on the front panel.
Each press of the
‘External’ Override but-

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 w/redRemote 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 detaiis.

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

Fan button for 5 seconds. All icons will appear.

Press and hold in the Fan button until Fd appears.
This resets all factory settings. To calibrate room
temperature, press the Up and Down buttons at
the same time twice. 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

Warranty

One-Year Warranty — This Product is warranted 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 remanufactured part, at the manufacturer'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.

THIS WARRANTY 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 separate warranty provided by the installer.

THIS WARRANTY APPLIES ONLY TO PRODUCTS
VOID UPON REINSTALLATION.

LIMITATIONS OF WARRANTIES — ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF FITNESS FOR
A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR
WHICH THE LIMITED WARRANTY IS GIVEN, SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN

IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESSED WARRANTIES MADE IN THIS
WARRANTY ARE EXCLUSIVE AND MANY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR,

DEALER, OR OTHER PERSON WHATSOEVER,
ALL WORK UNDER THE TERMS OE THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS,

ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY
THE REMAINING TIME PERIOD OF THIS WARRANTY,

THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:

1, Normal maintenance as outlined in the installation and servicing instructions or owner's manual including

filter cleaning and/or replacement and lubrication.

2, Damage or repairs required as a cansequence of faulty installation, misapplication, abuse, improper ser

vicing, unauthorized alteration or improper operation,

3, Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to

the inadequacy 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 Manufacturer.

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 inoluding addi

tional 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.

THEIR ORIGINAL INSTALLATION LOCATION AND BECOMES

Page 7

Copyright 2004 Carrier Corporation

H/lanufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book|l 4

Tab Ise 2f

Catalog No. 535-329 Printed in U.S.A. Form OM53-4 Pg 8 t1-04 Repiaces: New