Automatic Limit Switches

ALL UNITS ARE U.L. AND C.S.A. RECOGNIZED. RATINGS ARE 25 AMPS RESISTIVE @ 240V, 22A @ 277V

125VA PILOT DUTY, FOR 100,000 CYCLES

ALL ARE 1 1/2" X 2" OVAL WITH 1 5/8" ON CENTER MOUNTING HOLES, HAVE 1/4" QUICK CONNECT TERMINALS AND DROP THROUGH A HOLE INTO THE AIRSTREAM 3/8" EXCEPT FLUSH MOUNT (FM) & THE DEEP CUT (DC) MODELS THAT EXTEND 3/4". UNITS SHOWN AS "OD" HAVE AN OPEN OR EXPOSED BI-METAL DISC. UNITS SHOWN AS "CD" HAVE A CLOSED OR SHIELDED DISC. CLOSED DISC RESPOND SLOWER THAN OPEN DISC TYPE AND ALLOW APPROXIMATELY 10 TO 15 DEGREES HIGHER OUTLET AIR FROM A DUCT HEATER BEFORE REACTING. INCORRECT REPLACEMENTS COULD BE A HAZARD!!! ALL OPEN ON RISE OF TEMPERATURE. UNITS WITH A(-3) OR LARGER DIFFERENTIAL ARE USUALLY USED IN HEATERS AND FURNACES. THOSE WITH SMALLER DIFFERENTIALS ARE FOR APPLIANCE USAGE.

BTU PART #

L110-1OD L155-1CD L240-4CD ALL OD & CD UNITS
L120-1.5OD L155-2CD L250-5CD ARE 1 POLE
L120-1CD L160-4OD L260-5CD  
L130-2.5OD L160-2CD L275-5CD 2 POLE STACKED
L130-1CD L165-2CD L290-5CD ARE OD2 & CD2 UNITS
L135-3OD L170-4OD L300-5CD  
L135-1CD L170-2CD L320-5CD  
L140-3OD L175-2CD L325-5CD ALL ODFM & CDFM UNITS

L140-3OD2

  L340-5CD FLUSH ARE OBSOLETE
L140-3ODDC L175-4CD    
L140-1CD L180-1CD L175-1CDFM  
L145-3.5OD L180-4CD L320-4CDFM  
L145-1CD L190-4CD L330-5CDFM  
L150-4OD L200-4CD    
L150-1CD L210-4CD    
L150-4CD2 L220-4CD    
L150-4CD L225-4CD    
  L230-4CD    

L160-4OD W/2.25" strap
(Used on older Westinghouse units)

1 POLE LIMIT
1 POLE LIMIT
2 POLE LIMIT
2 POLE LIMIT

AUTOMATIC FAN SWITCHES

FAN SWITCHES ARE THE SAME PHYSICAL SIZE AS LIMITS ABOVE EXCEPT THEY CLOSE ON RISE TO START A DELAYED FAN OR HOLD IT ON AFTER THE HEATER HAS SHUT DOWN. RATINGS ARE 16 FLA, 60 LRA @ 240V., FOR 30,000 CYCLES

BTU PART #

F110-1.5CD F130-2CD F160-2CD
F110-1.5OD F130-2OD F180-2CD
F120-2CD F140-2CD F200-2CD
F120-2OD F150-2CD  

ADAPTOR PLATES FOR FAN OR LIMIT SWITCHES

2 1/8 X 2 3/4" PLATE WITH 2 1/4"
MOUNTINGHOLE CENTERS.

ADAPTER PLATE
ADAPTER PLATE