Owner's manual | Carrier 33CS420-01 Owner`s manual
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Carrier 33CS420-01 is a programmable thermostat that offers a wide range of features to help you control your home's heating and cooling system efficiently. With its 3 configurable outputs, you can control up to 3 heat and 2 cool stages, making it suitable for various HVAC systems. The adjustable 2nd and 3rd stage timers and deadbands allow for precise temperature control. The backlit display and button legends ensure easy operation, even in low-light conditions.
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INSTALLATION
INSTRUCTIONS
THERMOSTAT
P/N 33CS420-01
D
IGITAL
T
HERMOSTAT
HEAT
COOL
&
HEAT
PUMP
3 Configurable Outputs
Control up to 3 Heat &
2 Cool Stages
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
Set Point Limiting
Outdoor Sensor Ready with
High/Low Readouts for the Day
I2:00
Su
Pm
AUTO
74
C
OOL
Accepts EZ Programmer
Accepts Optional Humidity Module:
Controls Humidification,
Dehumidification and Reheat
Accepts Optional IR Remote Control
OPTIONAL
HUMIDITY MODULE
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
Carrier Corporation 04/06
Carrier
CAUTION
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing settings in setup or restoring Factory Defaults.
CAUTION
NEVER PUT MORE THAN ONE
JUMPER ON THE SAME MISC
JUMPER BLOCK!
THIS MAY DAMAGE YOUR
THERMOSTAT.
MISC3
OK
MISC3
NOTE: Due to variations in environmental conditions, it is not always possible to achieve the desired humidification or dehumidification setpoint.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
4Z95
Thermostat 33CS420-01
F C
Tested to Comply with FCC Standards
FOR HOME OR OFFICE USE
Page i
Page iii
Carrier
Preparation
Remove & Replace the
Old Thermostat
Configuring the MISC
Outputs
Wire Connections
Sample Wiring
Diagrams
Test Operation
Calibrating the
Thermostat Sensors
TroubleShooting
5
6
7
8
1
2
3
4
SECTION 1
1
Carrier
Proper installation of the thermostat will be accomplished by following these step by step instructions. If you are unsure about any of these steps, call a qualified technician for assistance.
Assemble tools
Flat Blade
Screwdriver
Wire cutter
& Stripper
Make sure your Heater/Air Conditioner is working properly before beginning installation of the thermostat.
Carefully unpack the thermostat. Save the screws, bracket, and instructions.
Turn off the power to the Heating/Air Conditioning system at the main fuse panel. Most residential systems have a separate breaker for disconnecting power to the furnace.
Page 1.1
SECTION 2
Carrier
Remove the cover of the old thermostat.
If it does not come off easily check for screws.
2
Loosen the screws holding the thermostat base or subbase to the wall, and lift away.
Disconnect the wires from the old thermostat.
Tape the ends of the wires as you disconnect them, and mark them with the letter of the terminal for easy reconnection to the new thermostat.
Keep the old thermostat for reference purposes until your new thermostat is functioning properly.
Page 2.1
SECTION 3
Carrier
3
Section 3 Contents:
Configuring the Jumpers........3.2
Explanation of Jumper
Settings..................................3.3
Page 3.1
Carrier
For additional flexibility, your thermostat has three configurable outputs. These outputs are designed to have different functions
3 depending on how the jumpers are set (below).
Each output, labeled MISC1, MISC2, and MISC3 may be set for one of the four choices available.
In the diagram below, the MISC3 jumper has been set for HUM*
(humidification) operation, the MISC2 jumper has been set for
DEHUM* (dehumidification) operation, and the MISC1 jumper has been set for Y2 (second stage cooling) operation.
W3
HUM
DEHUM
W1
Y1
G
MISC2
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
*The Humidity Module (sold separately) must
be installed to operate a humidification
and/or dehumidification system.
CAUTION
NEVER PUT MORE THAN
ONE JUMPER ON THE SAME
MISC JUMPER BLOCK!
DOING SO MAY DAMAGE
YOUR THERMOSTAT AND
VOID THE WARRANTY.
Page 3.2
MISC3
OK
MISC3
Carrier
3
W3 JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw terminal on the backplate will control a third stage of heat.
W3 MULTI-STAGE OPERATION EXPLAINED - SECTION 13 of the Owner’s
The 3rd Stage of Heat is turned on when:
(A) The 1st and 2nd stages have been on for the time required (steps 23
and 24, page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
(B) The temperature from the setpoint is equal to or greater than: the set-
point plus the 1st stage deadband (step #20, 13.5), plus the 2nd stage
deadband (step #21, 13.5) plus the 3rd stage deadband (step #22,
13.5). This 3rd stage deadband is adjustable from 0-10 degrees and
the default is two degrees.
Deadband db 3
(adj. 0-10 )
Heating
Deadband db 2
(adj. 0-10 )
Deadband db 1
(adj. 1-6 )
Deadband db 1
(adj. 1-6 )
Cooling
Deadband db 2
(adj. 0-10 )
3rd Stage turn on
2nd Stage turn on
1st Stage turn on
DECREASE
Heat
Setpoint
Cool
Setpoint
TEMPERATURE INCREASE
1st Stage turn on
2nd Stage turn on
HUM JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to HUM, the corresponding MISC screw terminal on the backplate will control a humidification system.
HUMIDIFICATION OPERATION - SECTION 9 of the Owner’s Manual
If your HVAC unit is equipped with a humidification system and the Humidity
Module (sold separately) has been installed, the thermostat will provide power to the MISC1, MISC2, or MISC3 terminal of the thermostat when the humidity in the home falls below the humidity setpoint you have chosen.
The value for this setpoint ranges from 0% to 60%. If no humidity is desired or if a humidification system has not been installed, set the value to OFF.
Page 3.3
Carrier
Explanation of Jumper Settings
(continued)
DEHUM JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM, the corresponding MISC screw terminal on the backplate will be connected to the dehumidification terminal of a furnace board.
NOTE: Not all furnaces have a dehumidification terminal.
3
DEHUMIDIFICATION OPERATION - SECTION 10 of the Owner’s Manual
If your HVAC unit is equipped with a dehumidification system the thermostat will operate in one of two ways.
1) Normally Closed (NC): The thermostat will de-energize the MISC1, MISC2,
or MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.
2) Normally Open (NO): The thermostat will energize the MISC1, MISC2, or
MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.
Page 3.4
Carrier
Explanation of Jumper Settings
(continued)
3
Y2 JUMPER SETTING
If the jumper for MISC1 is set to Y2 the MISC1 screw terminal on the backplate will control a second stage of cooling.
Y2 OPERATION - SECTION 13 of the Owner’s Manual
Control up to two Cool stages.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for the time required (step #23,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
And
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the deadband (step #24, page 13.6), plus
the 2nd deadband (step #21, page 13.5). This 2nd deadband is
adjustable from 0-10 degrees and the default is two degrees.
Deadband db 1
(adj. 1-6 )
Cooling
Deadband db 2
(adj. 0-10 )
Cool
Setpoint
1st Stage turn on
TEMPERATURE INCREASE
2nd Stage turn on
Page 3.5
SECTION 4
Carrier
If the terminal designations on your old thermostat do not match those on the new thermostat, refer to the chart below, or the wiring diagrams 4 that follow.
Wire from the old thermostat terminal marked
G or F
Y1, Y or C
W1, W or H
Rh, R, M, Vr, A
C
O/B
W2
MISC1
MISC2
MISC3
RS+5
RSGND
RS2
Function
Fan
Cooling
Heating
Power
Common
Rev. Valve
2nd Stage Heat
Configurable Output #1
Configurable Output #2
Configurable Output #3
Outside Sensor +5vdc
Outside Sensor Ground
Outside Sensor Signal #2
Install on the new thermostat connector marked
G
Y1
W1/O/B
R
C
W1/O/B*
W2
MISC1
MISC2
MISC3
RS+5
RSGND
RS2
* O/B is used if your system is a Heat Pump.
Page 4.1
SECTION 5
Carrier
Section 5 Contents:
5
HVAC Equipment Wiring............5.2
MISC1, MISC2, and MISC3
Wiring........................................5.6
Installing the Outside Sensor...5.8
Page 5.1
Carrier
6 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling, with 1st Stage Gas Heat
OR Commercial Heat Pump 1 Stage Cooling with 2 Stage Heat
5
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
ELEC
GAS
HP
GAS
B
O
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W1
Y1
G
MISC2
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
6 Conductor 18 gauge unshielded cable from the thermostat to the equipment.
24 vac common
24 vac return
Fan relay
Compressor relay
1st stage heat circuit
2nd stage heat circuit
6 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling, with 1st Stage Electric Heat
5
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
ELEC
GAS
HP
GAS
B
O
24 vac common
24 vac return
Fan relay
Compressor relay
1st stage heat circuit
2nd stage heat circuit
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W1
Y1
G
MISC2
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
6 Conductor 18 gauge unshielded cable from the thermostat to the equipment.
Carrier
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential Heat Pump with O Reversing
Valve 1 Stage Cooling, with 2 Stage Heat
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
ELEC
GAS
HP
GAS
B
O
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W1
Y1
G
MISC2
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
6 Conductor 18 gauge unshielded cable from the thermostat to the equipment.
24 vac common
24 vac return
Fan Relay
Compressor Relay
Reversing Valve
2nd stage heat circuit
Carrier
5
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential Heat Pump with b Reversing
Valve 1 Stage Cooling, with 2 Stage Heat
5
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
ELEC
GAS
HP
GAS
B
O
24 vac common
24 vac return
Fan Relay
Compressor Relay
Reversing Valve
2nd stage heat circuit
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W1
Y1
G
MISC2
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
6 Conductor 18 gauge unshielded cable from the thermostat to the equipment.
Carrier
Carrier
Adding a 2nd Stage of Cooling (MISC1) and a 3rd Stage of Heating (MISC3)
5
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W3
HUM
DEHUM
W1
Y1
G
MISC2
MISC3 MISC2
Y2
MISC1 (MISC1
ONLY)
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
3rd Stage Heat
2nd Stage Cooling
Page 5.6
Carrier
Adding a Humidification System (MISC1) and Dehumidification System (MISC2)
*
.
5
W2
MISC1
RS2
MISC3
RS+5
RSGND
W1/O/B
Y1
G
MISC2
R
C
W3
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W3
PROG
HUM
DEHUM
MISC3 MISC2 MISC1
Y2
(MISC1
ONLY)
W1
Y1
G
MISC2
R
C
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
ELEC
GAS
HP
GAS
B
O
W2
MISC1
RS2
MISC3
RS+5
RSGND
HUM
NO HUM
Humidity Module
(Sold Separately)
Dehumidification
System
Humidification
System
*
Requires Humidity Module.
Carrier
One wired or wireless remote sensor may be installed to read the outside temperature (RS2). The wired sensor can be connected to the thermostat with up to 150’ of 18 ga., 300’ of 20 ga., or 450’ of
22 ga. unshielded, thermostat wire. The wired sensor can be connected to the thermostat using a two or three wire installation.
If a two wire installation is required, then RS+5 must be connected to RSGND (see below).
5
This wire MUST be completely separated from the thermostat or any other control wiring and must NOT be in the same conduit as high voltage wiring.
W2
MISC1
RS2
MISC3
RS+5
RS1
RSGND
W1/O/B
Y1
G
MISC2
CK1
CKGND
R
C
RS-GND
RS
RS
Outside Sensor
See the Outside Sensor accessory for further details.
Page 5.8
SECTION 6
Carrier
Turn the power on to the Heating/Air Conditioning system.
6
Press the MODE button repeatedly until the
HEAT icon appears on the display. Press the
UP or DOWN buttons until the set temperature is 10 degrees above room temperature; the furnace should turn on.
Press the MODE button repeatedly until the
COOL icon appears on the display. Press the UP or DOWN buttons until the set temperature is 10 degrees below room temperature; the air conditioner should turn on. NOTE: Most equipment has a time delay of 5 minutes between cool cycles. This feature is defeatable on the thermostat. Consult the Owner's Manual under
Setup, cycles per hour.
Press the UP button until the setpoint is equal to the room temperature. Press the FAN button to Fan On. The fan should turn on and run continuously.
Note: Due to the Random Start feature there will be a 2 to 30 second delay
before heating or cooling may be energized. This delay helps to keep
multiple thermostats from energizing their outputs at the same time
after a power outage.
Page 6.1
SECTION 7
Carrier
Under normal circumstances it will not be necessary to adjust the calibration of the temperature and humidity sensors. If calibration is required, please contact a trained HVAC technician to correctly perform the following procedure.
MODE
Place the thermostat in the
OFF mode.
MODE
FAN
Press and hold the MODE button. While holding the
MODE button, press and hold the FAN button for 5 seconds.
All icons will appear on the display.
PRESS
TWICE
THERMOSTAT SENSOR
Press the UP and DOWN buttons at the same time twice. The thermostat temperature will be displayed and may be calibrated using the UP or DOWN buttons.
OFF
I2:00
Pm
Su
72
I8:88
Service Filter
UV Light
AUTO
OFFON
Unoccupied
123
Override
FanOn
Am
Pm
SuMoTuWeThFrSa
Program On
StartStop
DeHumidify
I88 Setup
H
I
88
C OOL
Outside
A UX H EAT
L
O
88
7
CALIBRATE
MODE
HUMIDITY SENSOR
Press the MODE button once. The relative humidity at the thermostat will be displayed and may be calibrated using the
UP or DOWN buttons.
CALIBRATE
After calibration is complete, press the MODE button to return to normal operation.
Page 7.1
SECTION 8
Carrier
SYMPTOM: The air conditioning does not attempt to
turn on.
CAUSE: The compressor timer lockout may prevent the
air conditioner from turning on, for a period of time.
REMEDY: Consult the Owner's Manual in the Setup
section to defeat the cycles per hour and
compressor timeguard.
8
SYMPTOM: The display is blank.
CAUSE: Lack of proper power.
REMEDY: Make sure power is turned on to the furnace
and that you have 24vac between R & W. If C is
used, 24vac between R & C.
SYMPTOM: The air conditioning does not attempt to
turn on.
CAUSE: The cooling setpoint is set too high.
REMEDY: Consult the Owner's Manual in the Setup
section to lower the cooling setpoint limit.
SYMPTOM: The heating does not attempt to turn on.
CAUSE: The heating setpoint is set too low.
REMEDY: Consult the Owner's Manual in the Setup
section to raise the heating setpoint limit.
Note: Due to the Random Start feature there will be a 2 to 30 second delay
before heating or cooling may be energized. This delay helps to keep
multiple thermostats from energizing their outputs at the same time
after a power outage.
P/N 88-503
Page 8.1
Rev. 5
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