Carrier 33CS, Debonair 33CS250-01 Installation, Start-up, And Operating Instructions Manual
Commercial Programmable Thermostat
Installation, Start-Up, and
Operating Instructions
Part Number 33CS250-01
Debonair®
33CS
CONTENTS
Page
SAFETY CONSIDERATIONS ...................... 1
GENERAL ........................................ 1
INSTALLATION ................................. 1-6
Select Thermostat Location ...................... 1
Install Thermostat ................................ 1
Set Clock......................................... 3
Heat Pump Configuration ........................ 3
Configure Advanced Setup....................... 3
Install Accessories ............................... 4
Program Thermostat Schedules..................5
Calibrate Sensor ................................. 6
Check Thermostat Operation.....................6
Final Checklist ................................... 6
OPERATION.................................... 6-8
Auto-Changeover ................................6
Two-Stage Operation............................. 6
Clock Backup .................................... 6
Fan Operation....................................6
Emergency Heat ................................. 6
Electric Heat ..................................... 7
Holiday Mode .................................... 7
Remote Temperature Sensor ..................... 7
Keypad Lock ..................................... 7
Dry Contact Switch/External Control .............7
10-Watt Resistor ................................. 7
TROUBLESHOOTING............................. 9
IMPORTANT Read entire instructions before starting the
installation.
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Follow all local electrical codes during installation. All wiring
must conform to local and national electrical codes. Improper
wiring or installation may damage thermostat.
Recognize safety information. This is the safety alert symbol . When the safety alert symbol is present on equipment
or in the instruction manual, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result
in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION
is used to identify unsafe practices which would result in minor
personal injury or property damage.
GENERAL
The 7-day, commercial, programmable thermostats are
wall-mounted, low-voltage thermostats which maintain room
temperature by controlling the operation of an HVAC (Heating,
Ventilation, and Air Conditioning) system. Separate heating
and cooling set points and auto-changeover capability allow
occupied and unoccupied programming for energy savings.
All thermostats allow up to 4 time/temperature settings to
be programmed per 24-hour period. Each thermostat stores
programs for 7 independent days. Batteries are not required.
During power interruption the internal NEVERLOST™ memory stores programmed schedules for an unlimited time while
the clock continues to run for at least 48 hours.
The thermostat can be configured to accept several different
equipment configurations, including heat pump operation.
NOTE: The thermostat is not factory-configured for use in heat
pump applications. The advanced setup must be performed to
configure the thermostat for use with heat pump units.
INSTALLATION
Select Thermostat Location —
be mounted:
• approximately 5 ft from the floor
• close to or in a frequently used room, preferably on an
inside partitioning wall
• on a section of wall without pipes or ductwork
• where temperature operating limits are within 41 to 104 F
(5 to 40 C)
• where humidity operating range is within 0 to 95% rela-
tive humidity, non-condensing
The thermostat should NOT be mounted:
• close to a window, on an outside wall, or next to a door
leading to the outside
• where exposed to direct light and heat from a lamp, the
sun, a fireplace, or any other temperature-radiating
object which may cause a false reading
• close to or in direct airflow from supply registers or
return air grilles
• in areas with poor air circulation (such as behind a door
or in an alcove)
The thermostat should
Install Thermostat
Before installing thermostat, turn off all power to the unit.
There may be more than one power disconnect. Electrical
shock can cause injury or death.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Ta b 1 a 1 3a
PC 111 Catalog No. 533-317 Printed in U.S.A. Form 33CS-12SI Pg 1 1204 12-97 Replaces: New
1. Turn off all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall.
b. Disconnect wires from existing thermostat. Do not
allow wires to fall back into the wall. As each wire
is disconnected, record wire color and terminal
connection.
c. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and must be
disposed of properly.
3. Remove the thermostat cover from wall plate (mounting
base) to expose mounting holes. See Fig. 1. With the thermostat facing forward, press the back plate on the left
hand side top corner to release the two prongs holding on
the cover. Pull off the cover when the prongs have been
disengaged.
4. Route thermostat wires through large hole in mounting
base. Remove outer sheath from wires for added flexibility. Standard solid or multi-conductor thermostat wire
should be used from the thermostat to the unit. Size and
length considerations are as follows: for a maximum distance from unit of 36 ft, use 22 AWG (American Wire
Gage) wire; for a maximum distance from unit of 100 ft,
use 18 AWG wire.
7. Secure mounting base to wall with 2 screws and anchors
provided. Ensure all wires exit through hole in mounting
base.
8. Adjust wire length and routing to allow proper closure of
the thermostat. Strip each wire at the end no more than
1
/4-in. to prevent adjacent wires from shorting together.
Match and connect wires to terminals on the thermostat.
See Fig. 2-4 and Table 1.
Improper wiring or installation may cause damage to the
thermostat. Check to ensure wiring is correct before proceeding with installation of unit.
9. Push excess wiring into wall. Seal hole in wall to prevent
drafts.
10. Re-attach thermostat cover to back plate by aligning the
top two prongs of the back plate in the vertical groove of
the top cover and then snapping the cover onto the back
plate.
11. Turn on power to unit. The thermostat will receive power
from the unit. The thermostat will be powered by 24 v,
nominal (18 to 30 vac). Terminals R (+ 24 v), W1/O/B
(first stage heat or reversing valve), Y1 (first stage cooling), and G (fan relay) will always be connected. Some
applications will use C (common), Y2 (second stage
cooling), or W2 (second stage heating).
Fig. 1 — Thermostat Mounting
5. Level mounting base against wall and mark wall through
the 2 mounting holes in base.
6. Drill two
3
/16-in. mounting holes in wall where marked.
Be careful not to drill into wiring in wall. Electrical shock
could result.
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W2 — Second-Stage Heat
Y2 — Second-Stage
RS2 — Second Remote
RS+5 — +5 vdc
RS1 — Remote Sensor
RS GND — Ground
Compressor
Sensor (Not Used)
→ Fig. 2 — Thermostat Wiring
2
LEGEND
W1/O/B — First-Stage Heat or
Y1 — First-Stage Compressor
G—Fan
W3/ECO — Economizer
CK1 — Dry Contact
CK2 — Dry Contact Ground
R—24 vac Transformer
C—24 vac Transformer
Reversing Valve
Common
THERMOSTAT
B
O
G
W2Y2R
→
(Single-Stage Cooling and Two-Stage Heat Units)
W2Y2R
→
(Two-Stage Cooling and Two-Stage Heat Units)
W1
THERMOSTAT
B
O
W1
C
Y1
24 VAC COMMON
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
2nd STAGE HEAT CIRCUIT
Fig. 3 — Typical Wiring
G
C
Y1
24 VAC COMMON
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
2nd STAGE COMPRESSOR RELAY
2nd STAGE HEAT CIRCUIT
Fig. 4 — Typical Wiring
FAN RELAY
24 VAC RETURN
FAN RELAY
24 VAC RETURN
Table 1 — Thermostat Wiring Terminations
EXISTING
WIRE
DESIGNATION
GorF Fan G
Y1, Y, or C Cooling Y1
W1,W,orH Heating W1/O/B
Rh,R,M,Vr,orA Power (24 v) R
C Common C*
O/B Reversing Valve W1/O/B†
Y2 Second Stage Cooling Y2
W2 Second Stage Heating W2
RS+5 Remote Sensor (5 vdc) RS+5
RS Remote Sensor Signal RS1
RS G Remote Sensor Ground RS GND
CK1 Dry Contact Switch CK1
CK2 Dry Contact Ground CK2
*Terminal C may not be used in all applications.
†Used on Heat Pump applications only.
FUNCTION
TERMINAL
CONNECTION
TYPICAL
UNIT
TYPICAL
UNIT
L
E
C
G
Y1
O
W1
R
Y2
W2
L
E
C
G
Y1
O
W1
R
Y2
W2
Set Clock — The Set Clock button allows the user to
change the time and day displayed on the thermostat. Press the
Set Clock button. The current time will blink on and off. Press
the UP ARROW and DOWN ARROW buttons until the correct time is shown. Hold down the buttons to quickly move
through the time display. Press and hold the Fan button while
pressing the UP or DOWN ARROW buttons to scroll through
by hours. The AM and PM annunciators will automatically
change. To ensure the schedules are properly followed, make
sure that AM or PM is correct for the time chosen. When the
correct time is shown, press the Mode button to modify the day
of the week. The current day will blink on and off. Press the UP
ARROW and DOWN ARROW buttons until the correct day is
shown. Press the Set Clock button again to exit the Set Time
mode.
Heat Pump Configuration — To configure the ther-
mostat for heat pump operation, Advanced Setup Steps 3 (Heat
Pump Operation) and 4 (Reversing Valve Polarity) must be
configured correctly. See the Configure Advanced Setup section for information on configuring these options.
NOTE: Some large commercial rooftop heat pump units
(50HJQ,TJQ,EJQ) must be configured with Advanced Setup
Step 3 (Heat Pump Operation) set to OFF. Refer to the base
unit instructions for more information.
Configure Advanced Setup — To ent er i nto the ad -
vanced setup screens of the thermostat, press the Mode and
Program buttons at the same time. The Advanced Setup Step
number is shown in the top right corner of the thermostat
screen. Use the Mode button to advance through the steps.
There are 18 Advanced Setup Steps. See Table 2. Press the Program button at any time to exit the Advanced Setup mode.
NOTE: Advanced Setup Steps 1 and 2 are configured with the
Set Clock button, and are not accessed through the advanced
setup screens.
Table 2 — Advanced Setup Configuration
STEP DESCRIPTION RANGE DEFAULT
1* Time of Day
2* Day of the Week
3 Heat Pump Off/On Off
4
5 Electric Heat Off/On Off
6 Deadband 1 - 6 F 2 F
7
8 Cycles per Hour d, d1, 2 - 6 6
9 Fan Purge Timer 0:00 - 3:00 0:00
10 Thermoglow™ Backlight Off/On On
11 Economizer Output NO/NC NO
12
13
14 Soft Start 0 - 99 0
15 Temperature Units F/C F
16 Security Level 0 - 3 0
17
18
NC — Normally Closed
NO — Normally Open
*Accessed and configured through the Set Clock button.
Reversing Valve
Pola rity
Forced Minimum
Temperature Difference
Reset Service
Filter Icon
Service Filter
Run Time
Maximum Allowable
Heat Set Point
Minimum Allowable
Cooling Set Point
LEGEND
12:00 AM -
11:59 PM
Sunday through
Saturday
O/B O
0-6F 2F
——
0-1950 hrs 500 hrs
35 - 99 F 80 F
35 - 99 F 65 F
12:00 AM
Monday
3
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HEAT PUMP CONFIGURATION (Steps 3 and 4) — To set
the thermostat for heat pump operation, Advanced Setup
Step 3 must be configured to ON. Use the UP and DOWN ARROW buttons to configure the step. The default is OFF. Press
the mode button to continue to Step 4. Step 4 is used to set the
reversing valve polarity for the heat pump. The variable can be
set to either “B”or “O.” Set the reversing valve polarity to the
correct value depending on the application. The default is “O.”
NOTE:Step4willappearonlyifStep3issettoON.Step5
will appear only if Step 3 is set to OFF.
→
ELECTRIC HEAT CONFIGURATION (Step 5) — Step 5 is
used to configure the thermostat for first stage electric heat. The
variable can be configured ON or OFF. The default is OFF.
NOTE:Step5willappearonlyifStep3issettoOFF.
DEADBAND (Step 6) — The deadband is the difference in
temperature above the cooling set point or below the heating
set point that the thermostat will wait before turning on the first
stage of heating or cooling. For example, if the cooling set
point is 82 F (28 C) and the deadband is 2 degrees, the first
stage of cooling will not be energized until the temperature
reaches 84 F (30 C). The range of values is 1 to 6 degrees. The
default is 2 degrees.
SET POINT MINIMUM DIFFERENCE (Step 7) — The minimum difference between heating and cooling set points can be
user-configured. The range is from 0 to 6 degrees. The default
is 2 degrees. The minimum difference is enforced during
Autochangeover and Program On operation.
CYCLES PER HOUR LIMIT (Step 8) — The number of
times that heating or cooling can be energized per hour can be
configured. Set the variable to “d” for no limit. Set the variable
to “d1” to disable the 5-minute compressor lockout. The variable can also be set from 2 to 6 cycles per hour. The default is
6 cycles per hour.
Damage to compressor could result if 5-minute compressor
lockout is disabled or compressor is allowed unlimited
cycles. Do not set thermostat Advanced Setup Step 8 to “d”
or “dl” unless specifically recommended for the application.
PRE-OCCUPANCY PURGE TIMER (Step 9) — The preoccupancy purge allows fresh outside air to be brought into the
space before the Occupied 1 time period. The timer limits the
amount of time that the purge can operate. The timer can be set
from 0 to 3 hours with 15-minute intervals. The default is
0 hours (disabled).
BACKLIGHT DISPLAY (Step 10) — The display backlight
can be set to ON (always on) or OFF (turn off 8 seconds after
usage). The default is ON.
ECONOMIZER OUTPUT (Step 11) — The thermostat has
an output terminal which can be controlled during Occupied
periods. This output terminal allows for the control of other devices such as economizers, lighting, water heaters, and baseboard heaters. The output can be set to NO (normally open) or
NC (normally closed). The default is NO.
If the Economizer Output configuration is set to NO, then
the W3/ECO terminal of the thermostat is energized when the
thermostat is in Occupied periods 1, 2 and 3, and also during
Pre-Occupancy Purge. The W3/ECO terminal is deenergized
during Unoccupied periods.
If the Economizer Output configuration is set to NC, then
the W3/ECO terminal of the thermostat is deenergized when
the thermostat is in Occupied periods 1, 2, and 3, and also during Pre-Occupancy Purge. The W3/ECO terminal is energized
during Unoccupied periods.
SERVICE FILTER (Steps 12 and 13) — Step 12 allows the
user to reset the Service Filter counter to zero and remove the
“SERVICE FILTER” icon (if displayed on the thermostat
screen). Press the FAN button while in Setup Step 12 and the
counter is reset to zero. Press the Mode button to adjust the
number of hours the blower will run before the “SERVICE
FILTER” icon is displayed. The range is 0 to 1950 hours. Set
the variable to 0 to disable this function. The default is
500 hours.
SOFT START (Step 14) — The soft start is used when multiple units are used in an application. The soft start staggers the
start up times of the units in the event of power loss and restart.
Each unit should be assigned a unit ID number. The 30-second
delay time is multiplied by the unit ID number to get the total
soft start delay time for each unit. For example, if the unit ID
number is 10, set the Soft Start function to 10, the start up delay
time is 30 seconds x 10 = 300 seconds (5 minutes). The range
is 0 to 99 (ID numbers). A value of 0 disables the function. The
default is 0 (ID number).
FAHRENHEIT/CELSIUS OPERATION (Step 15) — The
thermostat can be set to operate in Fahrenheit or Celsius
degrees. Set the variable to “F” for Fahrenheit operation. Set
the variable to “C” for Celsius operation.
SECURITY LEVEL (Steps 16 to 18) — The Security Level
limits the actions that the user can perform at the thermostat.
There are 4 security levels. When the security level is set to
“0,” no security will be in effect. When the security level is set
to “1,” the set point range is limited by the settings of Steps 17
and 18. When the security level is set to “2,” the set point range
is limited by the settings of Steps 17 and 18 and the Program
On thermostat operation mode is always in effect. When the
security level is set to “3,” the set point range is limited by the
settings of Steps 17 and 18, the Program On mode is always in
effect, and set point changes are prohibited. The default is 0.
NOTE: The Fan button is ignored when security Levels 2 or 3
are in effect.
Security Maximum Heat Set Point (Step 17)
—IftheSecurity Level is not set to 0, the maximum heating set point will be
in effect. The user will not be allowed to set the heating set
point over the specified value. The range of values is 35 to 99 F
(1 to 37 C). The default is 80 F (27 C).
Security Minimum Cool Set Point (Step 18)
—IftheSecurity Level is not set to 0, the minimum cooling set point will be
in effect. The user will not be allowed to set the cooling set
point below the specified value. The range of values is 35 to
99 F (1 to 37 C). The default is 65 F (18 C).
→
Install Accessories — The following accessories can
be used with this thermostat:
• remote temperature sensor with override
(33CSSEN-WB)
• remote temperature sensor (33CSSEN-01)
• Add-a-Wire™ accessory (33CSACC-AW)
• duct temperature sensor (33CSSEN-DS)
• Add-a-Subzone™ accessory (33CSACC-AZ)
• wireless remote sensor (33CSRFS-RC/RE)
Refer to the accessory installation instructions for each
accessory for more information.
REMOTE TEMPERATURE SENSOR — A remote temper-
ature sensor may be provided to read the temperature from a
space. If a remote temperature sensor is connected, the thermostat will ignore the reading of its internal sensor. When the thermostat is using a reading from a remote sensor, the degree symbol above the temperature reading will blink.
When installing a remote sensor, do not run the wires in the
same conduit as the HVAC equipment control wires, fire alarm
wiring, or other high voltage wiring. Do not use building
metalwork as a ground. Use only unshielded wire.
NOTE: Sensors can only be averaged when using a wireless
remote sensor (33CSRFS-RC/RE).
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