Carrier 33CSSP3-FC User manual

Installation Instructions

Table of Contents
Step#1: Preparation ..........................................................................2
Step#2: Applications .........................................................................3
Step#3: Wire Connections..................................................................4
Step#4: Test Operation & Wiring Diagrams .........................................6
Troubleshooting..............................................................................14
Technical Specications...................................................................16
Follow Installation Instructions carefully. Disconnect
Power to the Heater/Air Conditioner before removing
the old thermostat and installing the new thermostat.
CAUTION
IMPORTANT
© Copyright 2014, All Rights Reserved P/N 33CSSP3-FC
1
IMPORTANT: The Fan Coil Series Thermostat Controllers are intended to provide an input
to equipment under normal operating conditions. Where failure or malfunction of the
thermostat controller could lead to personal injury or property damage to the controlled
equipment or other property, additional precautions must be designed into the control
system. Incorporate and maintain other devices, such as supervisory or alarm systems or
safety or limit controls, intended to warn or protect against failure or malfunction of the
thermostat controller.

Step #1 Preparation
2
• 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 qualied technician for assistance.
• Assembletools.
• MakesureyourHeater/AirConditionerisworkingproperlybefore
beginning installation of the thermostat.
• Carefullyunpackthethermostat.Savethescrews,wallanchors,
and instructions.
• TurnothepowertotheHeating/AirConditioningsystematthe
main fuse panel.
INSTALLATION
Location Considerations
Locate the Fan Coil Series Thermostat Controllers:
• onapartitioningwall,approximately5ft(1.5m)abovetheoorina
location of average temperature.
• awayfromdirectsunlight,radiantheat,outsidewalls,outsidedoors,
air discharge grills, or stairwells; and from behind doors.
• awayfromsteamorwaterpipes,warmairstacks,unconditionedareas
(notheatedorcooled),orsourcesofelectricalinterference.
Drill with 3/16
inch Drill Bit
(when not
using j-box)
Flat Blade
Screwdriver Wire cutter
& Stripper

Step #2 Applications
3
New Applications
• FollowthethermostatandE-M(Electro-Mechanical)wiringdiagrams
suppliedwiththesubmittalpackage,andaxedtothefancoilunit
enclosure.Gotopages6through10forinstructionstotestoperationfor
the available applications.
Existing Applications
• Removethecoveroftheoldthermostat.Ifitdoesnotcomeoeasilycheck
for screws.
• 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.
CAUTION: Risk of Electric Shock.
Disconnectpowersupplybeforemakingelectricalconnectionstoavoidelectricshock.
CAUTION: Risk of Property Damage.
Donotapplypowertothesystembeforecheckingallwireconnections.Shortcircuited
or improperly connected wires may result in permanent damage to the equipment.
CAUTION
CAUTION
IMPORTANT:Makeallwiringconnectionsinaccordancewithlocal,national,andregional
regulations.DonotexceedtheelectricalratingsoftheFanCoilSeriesThermostatControllers.
Note: This thermostat is strictly a low voltage control. A compatible relay board must be
installed to isolate the 24 volt wires from the line voltage to the fan.

Step #3 Wire Connections
4
If the terminal designations on your old thermostat do not match
those on the new thermostat, refer to the chart below.
4-Pipe Systems
Wire from the Install on the
old thermostat Function new thermostat
terminal marked terminal marked
Y1,Y Cooling Y1
W1, W Heating W1
RH, R, M, Vr, A Power R
C Common C
G, F or LOW Low Fan Speed G
MED Medium Fan Speed G2
HIGH High Fan Speed G3
Note: Be sure to seal any opening through the wall behind
the thermostat with reproof material to prevent improper
temperature sensing of the conditioned space.

5
Step #3 Wire Connections
If the terminal designations on your old thermostat do not match
those on the new thermostat, refer to the chart below.
2-Pipe Systems
Wire from the Install on the
old thermostat Function new thermostat
terminal marked terminal marked
Y1,Y Water Valve Y1
W1, W Strip Heater W1
RH, R, M, Vr, A Power R
C Common C
G, F or LOW Low Fan Speed G
MED Medium Fan Speed G2
HIGH High Fan Speed G3
Note: Be sure to seal any opening through the wall behind
the thermostat with reproof material to prevent improper
temperature sensing of the conditioned space.

Step #4 Test Operation
6
4-PIPE SYSTEM
• TurnthepowerontotheFanCoilUnit.
• 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 hot water valve will open and the
fan will be running.
• 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 cold water valve will open and the
fan will be running.
• PresstheUPbuttonuntilthesetpointisequaltotheroomtemperature.
PresstheFanbuttonrepeatedlyuntilasinglebarappearsnexttotheFan
icon.Conrmthefanisrunningonlowspeed.PresstheFanbuttonagain,
conrmthefanisrunningonmediumspeed.Again,presstheFanbutton,
conrmthefanisrunningathighspeed.PresstheFanbuttononcemore,
thebarsnexttotheFaniconshoulddisappear.
• PresstheMODEbuttonrepeatedlyuntiltheOFF icon appears on the
display.Bothvalveswillbeclosedandthefanwillbeo.

Step #4 Wiring Diagram
7
Sample Wiring Diagram
4-Pipe, Low Voltage Valves, Duct Temperature Sensor
& Dry Contact
COM
G3/(Y)
G2/(W)
G
R
C
Sample Wiring Diagram
4-Pipe, Low V oltage V alves, Duct Temperature
Sensor & Dry Contact
COM
G
G3(Y)
G2(W)
BLACK
WHITE
Dry Contact
Duct Sensor
G100-71520307
R
C
R
C
G2
G3
G
RS
H2O
Ck1
Y1
W1 HC
Thermostat
24vac
Page 7
24 Volt Water
Valves
Important Note:IfaDuct
sensor is connected to this
thermostat it is suggested
that the fan be programmed
for continuous operation
(step#5,page11ofthe
Owner’sManual)

Step #4 Test Operation
8
2-PIPE, HEAT ONLY OR COOL ONLY
• TurnthepowerontotheFanCoilUnitandconrmthatthethermostatis
programmedcorrectlyinsetupsteps#3and#4onpage11oftheOwner’s
Manual.
• IfHeatOnly,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hotwatervalvewillopenandthe
fan will be running.
• IfCoolOnly,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coldwatervalvewillopenand
the fan will be running.
• PresstheUPbuttonuntilthesetpointisequaltotheroomtemperature.
PresstheFanbuttonrepeatedlyuntilasinglebarappearsnexttotheFan
icon.Conrmthefanisrunningonlowspeed.PresstheFanbuttonagain,
conrmthefanisrunningonmediumspeed.Again,presstheFanbutton,
conrmthefanisrunningathighspeed.PresstheFanbuttononcemore,
thebarsnexttotheFaniconshoulddisappear.
• PresstheMODEbuttonrepeatedlyuntiltheOFF icon appears on the
display.Bothvalveswillbeclosedandthefanwillbeo.

Step #4 Wiring Diagram
9
COM
G3/(Y)
G2/(W)
G
R
C
Sample Wiring Diagram
2-Pipe, Low V oltage V alve, Heat Only or Cool Only
COM
G
G3(Y)
G2(W)
R
C
G2
W1
G3
G
V
Y1
Thermostat
24vac
Page 8
24 Volt
Water Valve
Sample Wiring Diagram
2-Pipe, Low Voltage Valve, Cool Only

10
Step #4 Test Operation
2-PIPE, CHANGEOVER SENSOR, NO STRIP HEAT
• TurnthepowerontotheFanCoilUnitandconrmthatthethermostatis
programmedcorrectlyinsetupsteps#5and#6onpage19oftheOwner’s
Manual.
• Ifhotwaterisavailable,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watervalvewill
open and the fan will be running.
• Ifcoldwaterisavailable,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coldwatervalve
will open and the fan will be running.

Step #4 Wiring Diagram
11
COM
G3/(Y)
G2/(W)
G
R
C
Sample Wiring Diagram
2-Pipe, Low V oltage V alve, H2O Changeover Sensor
COM
G
G3(Y)
G2(W)
BLACK
WHITE
R
C
R
C
G2
G3
G
RS
H2O
V
Y1
Thermostat
24vac
24 Volt
Water Valve
H20 Changeover Sensor
G100-71520306
Closed Below 60˚
Open Above 75˚
Duct Sensor
G100-71520307
Sample Wiring Diagram
2-Pipe, Low Voltage Valve, H20 Changeover Sensor
Important Note:IfaDuct
sensor is connected to this
thermostat it is suggested
that the fan be programmed
for continuous operation
(step#5,page11ofthe
Owner’sManual)

12
Step #4 Test Operation
2-PIPE, CHANGEOVER SENSOR, WITH STRIP HEAT
• TurnthepowerontotheFanCoilUnitandconrmthatthethermostatis
programmedcorrectlyinsetupsteps#3and#4onpage11oftheOwner’s
Manual.
• 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. If hot water is available, the water valve
should open. If hot water is not available, the strip heater should turn on.
• Ifcoldwaterisavailable,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watervalvewill
open and the fan will be running.

13
Step #4 Wiring Diagram
Sample Wiring Diagram
2-Pipe, Low Voltage Valve, Changeover Sensor
with Electric Strip Heat
COM
G3/(Y)
G2/(W)
G
R
C
Sample Wiring Diagram
2-Pipe, Low V oltage V alve, Chilled W ater
with Electric Strip Heat
COM
G
G3(Y)
G2(W)
R
C
G2
G3
G
VVR
Y1
W1
Page 10
Thermostat
24vac
24 Volt
Water Valve
24 Volt Relay to
Control Strip Heater
R
H2O

Troubleshooting
14
• SYMPTOM:The fan will not run in all three speeds or switches speeds in an
improper order.
CAUSE: Incorrect wiring between the thermostat and the relay board, or
between the relay board and the fan wires.
REMEDY:Recheckthewiring(G=lowspeed,G2=mediumspeed,G3=high
speed).
• SYMPTOM:Coldwatervalveopensforeitheracooloraheatdemandina4-pipe
system.
CAUSE:The thermostat has been programmed for the incorrect type of fan coil.
REMEDY: Conrm that you have entered the correct programming for your type
offancoilsystem(steps#5and#6,page19oftheOwner’sManual).
• SYMPTOM:Thewatervalvedoesnotopenatallin2-pipecongurations.
CAUSE:The thermostat has been programmed for the incorrect type of fan coil
system or the fan coil is not wired to the thermostat correctly.
REMEDY:Programthethermostatfora2-pipefancoil(step#5,page19of
theOwner’sManual).Also,makecertainthatthewatervalveiswiredtotheY1
terminal.
• SYMPTOM:Thethermostatdisplayonlyshowsclock.
CAUSE:The thermostat has been programmed for a minimal display.
REMEDY:ProgramthethermostatforFullDisplay(step#3,page18ofthe
Owner’sManual).
• SYMPTOM:The thermostat displays large setpoint digits instead of the room
temperature.
CAUSE:The thermostat has been programmed to display Single Setpoint.
REMEDY:ProgramthethermostattodisplayDualSetpoint(step #4, page 19 of
the Owner’s Manual).

15
Troubleshooting
• SYMPTOM:Thethermostatdisplayashes‘Occupied1’whenrunningthe
program.
CAUSE:ThesensorconnectedtotheDryContactterminalsofthe
thermostat,isactive,forcingtheunitinto‘Occupied1’.
REMEDY: Verify proper wiring between the thermostat and the occupancy
sensor and verify that the wiring is not shorted. If no sensor is connected,
programtheDryContactpolarityforNormallyOpen(step#14,page21of
theOwner’sManual).
• SYMPTOM:ThethermostatwillonlyallowHeatorOin2-pipe
installations, even though chilled water is available.
CAUSE:Faulty,improperlywired,orimproperlyinstalledH2Ochangeover
sensor.
REMEDY:Conrmproperwiringofthechangeoversensor(betweenRand
H2O).Conrmproperplacementofthesensor(goodmechanicalcoupling
fortemperaturetransfer).Testthechangeoversensorasfollows:
 1.Removepowerfromthefancoilsystem.
 2.DisconnectthewirebetweenthesensorandtheH2Oterminal.
 3.PlaceanohmmeterbetweenRandthewirejustdisconnectedfrom
the sensor.
 4.Agoodsensorwillshowcontinuitywheneverthewatertemperature
  isconrmedtobeatorbelow65degrees.Ifthesensorisopenwhen
  thewatertemperatureisconrmedtobeatorbelow65,replace
the sensor.

Technical Specifications
17
XXXXX Series Thermostat Controllers
Power Requirements 20 - 30 VAC 50/60 Hz, 3 VA @ 24V nominal.
Valve Outputs 0.8A max, 0.01A min, 3A inrush, 20 - 30 VAC
Fan Outputs 0.4A max, 0.01A min, 3A inrush, 20 - 30 VAC
voltage free contacts, closed to signal CHILLED water supply
voltage free contacts, closed to alter setpoints
solid state temperature sensor, 10 mV / degF
16 AWG (100 ft max) to 24 AWG (36 ft max)
35 to 99 deg F (2 to 36 degC)
35 to 65 deg F +/- 3 degF, greater than 65 to less than 80 degF +/- 2 degF,
80 to 99 degF +/- 3 degF, greater than 99 to 104 degF +/- 5 degF
Adjustable 1 to 6 deg first stage, fixed 1 degree for med/hi fan speeds
35 to 104 degF (2 o 40 degC), 5 - 95% RH non-condensing, 86 degF
max dew point
-22 to 122 degF (-30 to 50 degC), 5-95% RH non-condensing, 86 degF
max dew point
UL/cUL listed, file E107041, NEC Class 2
3.14” H x 3.14” W x 1.1” D
0.25 kg
Output Rating
Digital Inputs H2O
CK1
Local Temperature Sensor Type
solid state temperature sensor, digital communications over two wires,
5 ft cable supplied, accurate to 1 degF
Remote Temperature
Sensor Type
Temperature Adjustment Range
Accuracy
Wire Size
Deadband
Operating
Storage
Ambient
Conditions
Compliance
Dimensions
Shipping Weight
This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area may cause harmful interference, in which case the users
will be required to correct the interference at their own expense.
United States
Canada
North American Emissions Compliance
This Class (B) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numerique de la Classe (B) respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada.
‘
‘
‘
Fan Coil Series Thermostat Controllers

Printed on recycled paper.
P/N 88-1078 Rev. 1