The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

The Robertshaw® 2374-510 Air Pressure Sensing Switch has a glass-filled polycarbonate housing containing a sensing diaphragm and an integral snap-acting switch with three male 90° quick-connect terminals. The switch can sense positive, negative or differential air pressure. The field adjustable set point range of this switch is 0.10” WC to 10.0” WC. Using the switch accessories contained in this kit, the switch can be applied to a wide variety of residential and light commercial HVAC applications.

2374-510 Kit Contents
Air pressure sensing switch
Calibration springs (5 options)
Orifice flows (4 options)
Mounting brackets (2 options)
Calibration tool (hex wrench)

The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

SUPCO® offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired

Features/Benefits

Can be used with and without start capacitor motors from 1/4 to 1/3 hp
Locked rotor protection eliminates start winding overheating
RO series features "snap-on" bracket
UL® Recognized

SUPCO® offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired

Features/Benefits

Can be used with and without start capacitor motors from 1/12 to 1/5 hp, up to 4.05 Amp max.
Locked rotor protection eliminates start winding overheating
RO series features "snap-on" bracket
UL® Recognized

SUPCO® offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired

Features/Benefits

Can be used with and without start capacitor motors from 1/4 to 1/3 hp
Locked rotor protection eliminates start winding overheating
RO series features "snap-on" bracket
UL® Recognized

SUPCO® offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired

Features/Benefits

Can be used with and without start capacitor motors from 1/4 to 1/3 hp
Locked rotor protection eliminates start winding overheating
RO series features "snap-on" bracket
UL® Recognized

SUPCO® offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired

Features/Benefits

Can be used with and without start capacitor motors from 1/4 to 1/3 hp, up to 6.8 Amps.
Locked rotor protection eliminates start winding overheating
RO series features "snap-on" bracket
UL® Recognized

CAPACITOR, OVLD AND START, RLY, 1.66A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 115V, 10A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 1.66 A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 230V

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 115V, 6.8A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 230V, 7.5A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

CAPACITOR, OVLD AND START, RLY, 115V, 40A

Prevents low voltage starting problems
Replaces relay, overload and provides a boost for hard start and unbalanced systems
Wire designations - white/start, black/common, red/run

OV Series 3 / 4" Universal Replacement Motor Protectors

Features/Benefits

Built in temperature activated disc opens and closes the motor overload protector's contacts
Protects compressor or motor from excessive high heat situations
UL® & CSA Approved
Universal replacement overload

Locked rotor amps: 45.0-49.0
hp @ 120 VAC: 1/2 thru 3/4
hp @ 240 VAC: 1

OV Series 3 / 4" Universal Replacement Motor Protectors

Features/Benefits

Built in temperature activated disc opens and closes the motor overload protector's contacts
Protects compressor or motor from excessive high heat situations
UL® & CSA Approved
Universal replacement overload
WARNING: Prop 65 info

Locked rotor amps: 40.5-44.5
hp @ 120 VAC: 1/3 thru 3/4
hp @ 240 VAC: 1/2+ thru 1