Carrier 53DFST2-NP User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 535-330 Printed in U.S.A. Form OM53-5 Pg 1 11-04 Replaces: New
Book 1 4
Ta b 3 e 2 f
• Dual Set Point
• 5+1+1 Day Programmable
• 3 Occupied Periods and 1 Unoccupied Period
• Very Easy to Program
• Large, Easy to Read Display
• Thermoglow™ Backlight
• No Batteries Required
• Auto Changeover
•EnergySavingSmartFan
• Locking Keypad
•OverrideButton
• 3 Fan Speeds
• Meets California Title 24
• Use with Carrier Duct-free HEAT-COOL or COOL-
ING ONLY systems
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 4
WARRANTY 6
Table of Contents
IMPORTANT: Follow Installation Instructions
before proceeding.
CAUTION: SET THERMOSTAT TO MODE “OFF”
PRIOR TO CHANGING SETTINGS IN SETUP OR
RESTORING FACTORY DEFAULTS.
Display
1 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 automati-
cally 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.
2 Clock with Day of the Week
Indicates the current time and day. This clock is also
used to program the timer periods.
Seepage2.
3 Room Temperature Display
Indicates the current room temperature.
4 Desired Set Temperature
Indicates desired room temperature(s).
Seepage2.
5 Override Indication
Indicates the current program is currently being
overridden for up to 4 hours.
See pages 2
and 4 .
6Occupied or Unoccupied Indication
Indicates the program number: Occupied 1, 2, 3,
or Unoccupied.
See page 3.
Owner’s Manual
PROGRAMMABLE DIGITAL THERMOSTAT
53DFST2-NP
1 Liquid Crystal Display with Thermoglow™Backlight
2 Up/Down Buttons
3 Mode Button
4 Override Button
5 Heat or Cool Indicator
Heat = Red, Cool = Green
:Am
HEAT
AUTO
We
COOL
2
3
45
1
1
21
5
1
3
6
7
9
8
4
4
10
1
unoccupied
Fan
Program On
Am
Pm
COOL
HEAT
Override
Locked
ONOFF
AUTO
Stop
Start
SetupSuMoTuWeThFrSa
123
:
!

Page 2
The thermostat is preprogrammed from the factory to op-
erate without the need for further programming. To opti-
mize the installation of this thermostat follow the instruc-
tions in the Advanced Setup section.
NOTE: The thermostat is not programmed to operate
Duct-Free Split heat pump systems
.
Display
7Setup Indication
Indicates the thermostat is in the programming
mode. Seepage4.
8Fan Operation Indication
Fan On Icon — indicates constant continuous fan
operation in one of three manual speeds.
When FanOnIconis not lit — indicates the fan
will only operate when necessary to heat or to
cool.
See page 4.
9Locked Indication
Locked appears after the right combination of
buttons are pressed, rendering the buttons in
operative.
See page 4.
10 Start/Stop Indication
Start or Stop appears when programming timer
functions.
See page 3.
Quick Start Set the Clock and Go
Basic Operation
Pm
Su
:
Setup
Setup
During Setup and Programming:
Pressing the Mode button selects
different flashing items. (Repre-
sented in black.)
Pressing the Up and Down buttons
will modify the flashing selection.
Pm
Mo
Pm
Mo
Pm
Mo
ProgramOn
Pm
Mo
occupied1
OFF
Pm
Mo
:
:
HEAT
HEAT
COOL
COOL
HEAT
COOL
:
:
:
AUTO
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.
Pressing the up/down buttons in Auto mode will adjust both the
heat and cool set temperatures simultaneously.
Pressing the up/down buttons in Heat or Cool modes will adjust
only the heat or cool set temperature.
Select Desired Temperature
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.
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 1 icon ap-
pear on the display.
The time of day clock alternates
with the time remaining in over-
ride.
During Override, the set points
are adjustable, provided the key-
pad is not locked.
Select Mode
AUTO
Pm
Mo
:
HEAT
COOL
buttons.
In any mode, adjust the
desired Set Point Temperatur
e
with
Pm
Su
unoccupied
Pm
ProgramOn
Su
Override
occupied 1
:
Stop
:
:
HEAT
COOL
HEAT
COOL
Pm
ProgramOn
Override

Page 3
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 freezeprotection
cycle or in heating, the high-pressure protection cycle.
(See Advanced Set-Up 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 an-
other 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. Programming Notes
• If only one Occupied period is selected in Step 1 on
this page, 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.
• 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.
•Ifthesame 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.
Programming Occupied and Unoccupied
Periods
occupied
occupied 1
occupied 1
unoccupied
1
COOL
COOL
COOL
HEAT
Select the maximum number
of occupied periods to be
used on any one day.
Adjust the cooling
set point for occupied 1.
(35 to 99 F)
(1,2 or 3)
Adjust the heating
set point for occupied 1.
(35 to 99 F)
Adjust the cooling
set point for unoccupied
periods.
(35 to 99 F)
Adjust the heating
set point for unoccupied
periods.
(OF,35 to 99 F)
MODE
unoccupied
COOL
HEAT
Typically 1.
MoTuWeThFr
occupied 1
occupied 1
Start
Stop
Pm
occupied 1
ON
occupied 1
Am
MoTuWeThFr
Select the day for
Occupied 1.
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Adjust the start time
for occupied 1.
Adjust the stop time
for occupied 1.
:
:
MoTuWeThFr
MoTuWeThFr
To exit programming press the Mode button.
While holding Mode, press the Up button.

Page 4
Advanced Setup Table
*Not applicable for use with Duct-Free Split Heat Pump systems.
• CLOCK BACKUP — In the event of a power loss,
the thermostat internal clock will continue to keep
proper time for a minimum of 48hours without
external power or batteries.
• MINIMUM HEAT/COOL SETPOINT 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 this page . This mini-
mum difference is enforced during Auto changeover
and Program On operation.
• ENERGY SAVING SMART FAN — If a manual fan
speed is selected, the fan will run continuously at all
times. If mode is Off, the fan will only run if there is a
heating or cooling demand in 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, for up to 4 hours. If the Override but-
tonispressedduringanOccupiedperiod,thether-
mostat will be forced into Unoccupied and the
occupied period
(1,2 or 3) ,itwasforcedoutofwill
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.
• 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. The Locked icon will appear on the display.
To
unlock the 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.
• DISPLAY BLANKING — The thermostat display
may be configured in advanced setup, this page,
Step 3, to always be visible as normally expected,
or may be selected Off. When selected Off, only the
time of day will appear until a button is pressed.
When a button is pressed the full, normal display
will appear and then revert to the time of day only,
after roughly 10 seconds.
Advanced Setup
STEP NO. DESCRIPTION RANGE FACTORY
DEFAULT
1 Time of day clock set 24 hour 12:00 Am
2 Day of the week Su - Sa Mo
3 Display Blanking Off /On On
4 Fan Operation Auto /On Auto
5 Heat Pump*Off /On On
6Deadband or Temperature swing 1 - 6F2F
7Forced minimum difference
heat/cool 0-6F2F
8Cycles per hour d, d1, 2 - 66
9Thermoglow™ backlight Off /On On
10 Fahrenheit or Celsius F /CF
About Advanced Features and Operation
Pm
Setup
Setup
Setup
Su
ON
Setup
:
Setup
Setup
Setup
OFF
Setup
Setup
ON
Setup
IMPORTANT: Be sure to press and hold the override button
with the Mode button for full ten seconds.
NOTE: Step 5 is not applicable for use with Duct-Free Split Heat Pump
Systems.
P
ress the Mode button. WhileholdingtheMode,presstheOverridebuttonto
eave the Setup screens. If no buttons are pressed, the display will leave the
s
etup screens after 60 seconds.
Pm
Mo
Locked
unoccupied
:
Cool
Heat
ProgramOn
o

Page 5
• DUAL SET POINT BEHAVIOR — The adjustable
set point range is: 35 to 99 degrees in Fahrenheit
and 7to 35 degrees in Celsius. Wheninthemodes
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 7, page 4.
When entering the Auto mode from Cool, the Heat
and Cool set point temperatures 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 Cool and Heat set points
would be 80and70. 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 points closer
together, enter the Cool or Heat mode by pressing
the Mode button, then adjust the set point(s)closer
together. Heat islimitedtohowcloseitcancometo
Cool by Step 7, page 4 .
• 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 the Override button until Fd
appears. All icons will appear. Press and hold in the
FanbuttonuntilFd appears. This resets all factory
settings. To calibrate 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.
Am
HEAT
AUTO
Mo
:

Page 6
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 IN THEIR ORIGINAL INSTALLATION LOCATION AND BECOMES
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 IM-
PLIED 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 OF 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 consequence 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 including 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.
Warranty

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 535-330 Printed in U.S.A. Form OM53-5 Pg 811-04 Replaces: New
Book 1 4
Ta b 3 e 2 f
Copyright 2004 Carrier Corporation