Emerson White Rogers SureSwitch 49P11-843 User Manual

49P11-843
Emerson SureSwitch™
PART NO. 37-7295B
Replaces 37-7295A
1304
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
PRECAUTIONS
CONTENTS
Description ....................................................................... 1
Precautions ....................................................................... 1
Specications ................................................................... 2
Mounting .......................................................................... 2
Quick Reference ................................................................... 2
Operation ......................................................................... 3
Troubleshooting ............................................................... 3
Wiring Diagram .................................................................... 4
DESCRIPTION
SureSwitch™ is an electronically-controlled relay that can be used
to replace single and two-pole contactors commonly used in air
conditioners, heat pumps and other applications. A patented switching
algorithm reduces arcing between contacts, which nearly eliminates
pitting and welding for a longer life. The switching mechanism is sealed
to prevent intrusion from insects and other debris.
SureSwitch also provides advanced features for HVAC troubleshooting
and system reliability:
• Line-VoltageBrownoutProtection
• ShortCycleProtection
• RandomStartDelay
• LifetimeCycleCount
SureSwitch is similar to a 1
1
/
2
pole contactor, in that only the
compressor terminal C is switched. The compressor terminal R is
connected by a shorting bar to line input L1, and is energized even
when a call is not present.
Installationshouldbedonebyaqualiedheatingandairconditioning
contractor or licensed electrician.
Donotexceedthespecicationratings.
All wiring must conform to local and national electrical codes and
ordinances.
This control is a precision instrument, and should be handled carefully.
Roughhandlingordistortingcomponentscouldcausethecontrolto
malfunction.
Following installation or replacement, follow manufacturer's
recommended installation/service instructions to ensure proper
operation.
SureSwitchhasnouserserviceableparts.Replaceasaunit.
www.white-rodgers.com
www.emersonclimate.com
Operator: Save these instructions for future use!
Failure to comply with the following warnings could result
in personal injury or property damage.
FIRE HAZARD
• Donotexceedthespeciedvoltage.
• Replaceexistingcontrolwithexactmodelanddash
number.
• Protectthecontrolfromdirectcontactwithwater
(dripping, spraying, rain, etc.).
• Ifthecontrolhasbeenindirectcontactwithwater,
replace the control.
• Labelallwiresbeforedisconnectionwhenservicing
controls. Wiring errors can cause improper and
dangerous operation.
• Safetyrouteandsecurewiringafterinstallation.
SHOCK HAZARD
• Disconnectelectricpowerbeforeservicing.
• Ensureproperearthgroundingofappliance.
• Ensureproperconnectionoflineneutralandlinehot
wires.
• Compressoroutput"R"isnotswitchedandis
energized at all times.
WARNING
!

Emerson White Rogers SureSwitch 49P11-843 Specifications

General

Type	Electromechanical Relay
Model Number	49P11-843
Coil Voltage	24 VAC
Electrical Life	100, 000 cycles
Mechanical Life	1, 000, 000 cycles
Mounting	Panel Mount
Brand	Emerson
Contact Rating	10A
Termination Type	Quick Connect
Contact Form	SPST-NO (Single Pole Single Throw - Normally Open)