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