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OWNER’S  
MANUAL  
P/N3 33 C SS IRRCV RR - 00 1  
Thermostat  
Remote Control  
Receiver  
&
Allows remote control  
operation of basic  
thermostat functions  
Unique ‘Warmer & Cooler’  
commands  
Compatible with thermostat models:  
3
3CS450-01, 33CS420-01 &  
3CS400-01  
for a complete list contact Carrier  
3
Complete Control from  
Carrier Corporation - 01/06 - Patents Pending  
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Overview  
This accessory allows for the remote operation of  
the most basic thermostat functions.  
There are five buttons on the remote control. One  
for Off, two for Fan control, one for Warmer and one  
for Cooler.  
The communication from the remote control to the  
receiver is uni-directional, without feedback to the  
user. It is because of this uni-directional control, we  
have created a unique control algorithm for this  
remote system.  
The Warmer and Cooler buttons use a ‘fuzzy logic’  
algorithm to decide whether to turn the heat or cool  
on or off.  
The Warmer or Cooler operational control  
sequence varies depending on whether the  
thermostat is set to be a MANUAL or an AUTO  
changeover thermostat.  
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Operation  
Press the Warmer or Cooler  
buttons and the heating -  
cooling system will operate as  
outlined in pages 4 through 8.  
If the thermostat was off prior to  
a Warmer or Cooler button  
press, the system will turn on in  
the last mode (Auto or Manual  
changeover) of operation prior  
to pressing Off.  
Press the Fan On button for  
continuous fan operation.  
Pressing Fan Auto will allow the  
Fan to turn on the fan only  
when there is a heat or cool  
demand.  
Press the Off button to turn the  
thermostat off.  
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O Warmer & Cooler Commands in Manual Changeover  
If the thermostat is configured for Manual  
Heat/Cool changeover:  
WARMER button press while in Heat or Off  
mode:  
When the thermostat receives a Warmer command  
(
button press) through the remote control and the  
heater is not running, the set point will be raised  
above the room temperature to start the heater  
operation. This occurs even if the thermostat was  
Off.  
When the thermostat receives a Warmer command  
and the heater is running, the set point will be  
raised 2 degrees above the present set point.  
WARMER button press while in Cool mode:  
When the thermostat receives a Warmer command  
(
button press) through the remote control in Cool  
mode, and the air conditioner is running, the set  
point will be raised to the present room  
temperature, which will turn off the air conditioner.  
If the Warmer button is pressed and the air  
conditioner is not running, the set point will be  
raised 2 degrees.  
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O Warmer & Cooler Commands in Manual Changeover  
If the thermostat is configured for Manual  
Heat/Cool changeover:  
COOLER button press while in Cool or Off  
mode:  
When the thermostat receives a Cooler command  
(
button press) through the remote control and the  
air conditioner is not running, the set point will be  
lowered below the room temperature to start the  
cooling operation. This occurs even if the  
thermostat was Off.  
When the thermostat receives a Cooler command  
and the air conditioning is running, the set point will  
be lowered 2 degrees below the present set point.  
Cooler button press while in Heat mode:  
When the thermostat receives a Cooler command  
(
button press) through the remote control, and the  
heater is running, the set point will be lowered to  
the present room temperature which will turn off the  
heater.  
If the Cooler button is pressed and the heater is not  
running, the set point will be lowered 2 degrees.  
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O Warmer & Cooler Commands in Auto Changeover  
If the thermostat is configured to Auto  
Heat/Cool changeover:  
WARMER button press while in Auto or Off  
mode:  
When the thermostat receives a warmer command  
(
button press) through the remote control, and the  
heater is not running, the set points will be raised  
to start the heater operation. If the heater is  
running upon a Warmer button press, the set points  
will be raised 2 degrees.  
The remote control receiver will allow up to 3  
successive Warmer button presses. After the 3rd  
successive Warmer button press, the IR receiver  
will not accept an additional Warmer button press  
for 1 minute.  
When the thermostat receives a Warmer command  
(
button press) and the air conditioner is running, the  
set points will be raised so that the Cool set point is  
the same as the present room temperature which  
will then turn off the air conditioner. The thermostat  
will not accept another Warmer button press for 10  
seconds.  
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O Warmer & Cooler Commands in Auto Changeover  
If the thermostat is configured to Auto  
Heat/Cool changeover:  
COOLER button press while in Auto or Off  
mode:  
When the thermostat receives a Cooler command  
(
button press) through the remote control and the  
air conditioner is not running, the set points will be  
lowered to start the air conditioning operation. If  
the air conditioner is running upon a Cooler button  
press, the set points will be lowered 2 degrees.  
The remote control receiver will allow up to 3  
successive Cooler button presses. After the 3rd  
successive Cooler button press, the IR receiver will  
not accept an additional Cooler button press for 1  
minute.  
When the thermostat receives a Cooler command  
(
button press) and the heater is running, the set  
points will be lowered so that the Heat set point is  
the same as the present room temperature which  
will then turn off the heater. The thermostat will not  
accept another Cooler button press for 10 seconds.  
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O Examples of Typical Operation  
The following 3 examples illustrate operation  
when the thermostat is Off.  
Example #1  
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The thermostat was turned off the prior day while  
in Auto changeover mode.  
The following will occur if the Warmer button is  
pressed while the thermostat is off:  
The thermostat changes from Off to Auto.  
The set point is raised to start heater  
operation.  
Example #2  
The thermostat was turned off the prior day while  
in Manual, ‘standalone’ Heat mode.  
The following will occur if the Warmer button is  
pressed while the thermostat is off:  
The thermostat changes from Off to Heat.  
The set point is raised to start heater  
operation.  
Example #3  
The thermostat was turned off the prior day while  
in Manual, ‘standalone’ Cool mode.  
The following will occur if the Warmer button is  
pressed while the thermostat is off:  
The thermostat changes from Off to Heat.  
The set point is raised to start heater  
operation.  
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Connection  
Accessory release button  
Accessory jack located  
on thermostat bottom  
To connect the IR Receiver to  
the thermostat; insert the IR  
receiver plug into the accessory  
Jack of the thermostat. The  
receiver will ‘lock’ into the  
ventilation slots of the thermostat.  
To remove the IR receiver from  
the thermostat; press and hold  
the accessory release button  
while removing the IR receiver  
from the thermostat’s accessory  
jack.  
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Remote Control Battery Replacement  
Front View  
Rear View  
+
+
Battery Door  
Replace battery with CR 2025 or equivalent.  
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Warranty  
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 IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESSED  
WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY 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:  
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. Normal maintenance as outlined in the installation and servicing instructions or owner’s  
manual, including filter cleaning and/or replacement and lubrication.  
. Damage or repairs required as a consequence of faulty installation, misapplication, abuse,  
improper servicing, unauthorized alteration or improper operation.  
. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other  
damages due to the inadequacy or interruption of electrical service.  
. 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.  
. Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and  
Canada.  
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. Electricity or fuel costs or increases in electricity or fuel costs for any reason whatsoever  
including additional or unusual use of supplemental electric heat.  
. 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.  
P/N 88-510 Rev. 1  
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