The A421 Series Electronic Temperature Controls are single-stage controls with a single-pole, double-throw (SPDT) output relay. A421 Controls feature a bright backlit LCD with adjustable brightness and a three-button touchpad interface that can be set up to restrict user adjustments. An LED indicates the output relay's On/Off status. Standard A421 Series control modules have simple On and Off temperature settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, and sensor offset capability. The temperature control range is -40 to 212°F or -40 to 100°C. The A421 controls are available either in Type 1 (NEMA), IP20 (CE), high-impact plastic enclosures suitable for surface or DIN rail mounting or in Type 4X (NEMA), IP67 (CE) watertight, corrosion resistant surface mount enclosures.

The A421 Electronic Temperature Control can be used to control a wide variety of single-stage refrigeration or HVAC equipment.Sample temperature control applications can be found inside the product data sheet.

A421ABC-02:
Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount applications. Rated for 120/240 VAC. Includes an A99BB-200C temperature sensor with 6 ft 7-1/5 in. (2.0 m) cable

The Robertshaw® 1980 Series Snap-Fit® Thermocouples offer easy installation into the majority of pilot burners. They are manufactured without complicated adaptors, but with extra insulation that the brass sheath provides under high ambient temperatures.

Features and Benefits

Easy burner installation with attached threaded nut
Stainless steel outer jacket for long life and resistance to heat blistering
Combination of copper and nickel alloys for good electrical conductivity
Mica washer to insulate from shorting conditions
Tinnerman clip included
Various lengths available for multiple applications

Features
Features A421 Standard model
Control Front Panel LCD:
Displays the temperature, parameters, and status and allows you to adjust the backlight intensity for ambient light conditions. Custom icons display the system and control status.
Basic and Advanced Programming Menu:
Provides two levels of parameter adjustment and control setup, allowing you to set up advanced features in one menu and easily adjust basic parameters in the other menu.
On/Off Temperature Adjustment:
Allows you to select the temperature values at which the relay turns On and Off, which automatically defines the Heating or Cooling mode of operation.
Switch-Activated Temperature Setback:
Allows you to shift the On/Off temperature by an adjustable setback value. When a user-supplied switch closes the binary input control circuit, the control operates at the defined setback temperatures.
Adjustable Anti-Short Cycle Delay:
Allows you to select the minimum time the output relay remains off before the next on cycle; avoiding short cycling, hard starts, and nuisance overload outages on compressors and other inductive applications.
Adjustable Sensor Offset:
Allows you to adjust the displayed temperature to the actual sensed temperature.
Optional Restricted Adjustment Mode:
Allows you to restrict the On/Off adjustment to your defined temperature range.
Sensor Failure Mode:
Allows you to select the relay On/Off state in the event of a sensor or sensor wire failure.
Backlight Brightness Level:
Allows you to adjust the LCD backlight intensity.
Extra Features A421 Defrost model
Off-Cycle Defrost:
Allows you to shut off the refrigeration system for defined defrost time interval and frequency. You can also start or stop a manual only defrost offcycle.
Extra Features A421 Timer model
Free-Cooling and Ventilation:
Allows you to adjust for free-cooling and timed-ventilation, and provides over-cooling protection.

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 A421 Series Electronic Temperature Controls are single-stage controls with a single-pole, double-throw (SPDT) output relay. A421 Controls feature a bright backlit LCD with adjustable brightness and a three-button touchpad interface that can be set up to restrict user adjustments. An LED indicates the output relay's On/Off status. Standard A421 Series control modules have simple On and Off temperature settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, and sensor offset capability. The temperature control range is -40 to 212°F or -40 to 100°C. The A421 controls are available either in Type 1 (NEMA), IP20 (CE), high-impact plastic enclosures suitable for surface or DIN rail mounting or in Type 4X (NEMA), IP67 (CE) watertight, corrosion resistant surface mount enclosures.

The A421 Electronic Temperature Control can be used to control a wide variety of single-stage refrigeration or HVAC equipment.Sample temperature control applications can be found inside the product data sheet.

The Robertshaw® 1980 Series Snap-Fit® Thermocouples offer easy installation into the majority of pilot burners. They are manufactured without complicated adaptors, but with extra insulation that the brass sheath provides under high ambient temperatures.

Features and Benefits

Easy burner installation with attached threaded nut
Stainless steel outer jacket for long life and resistance to heat blistering
Combination of copper and nickel alloys for good electrical conductivity
Mica washer to insulate from shorting conditions
Tinnerman clip included
Various lengths available for multiple applications

710 Series - Low Capacity
The Robertshaw® 710 Series Low Capacity Gas Valves feature an extremely compact control designed for low capacity and limited space applications. Features include three-position outlets, multi-positional capability and component replaceability.

Features and Benefits

Low capacity with 3-13/16”H x 4-21/32”L x 1-29/32” W dimensions
Gas cock dial marking Off - Pilot - On
Ambient temperature of -40°F to 175°F
Pilot outlet 1/4” tubing
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and LP/air mixtures
Multiple actuators available
RoHS compliant

The Robertshaw® 720 Series 24 Volt Dual Gas Valve is a six-function gas valve incorporating a manual valve, safety shut-off magnet, dual automatic valves, main gas regulator, and pilot adjustment. Models are available with and without a pressure regulator. Uni-Kit® models are factory set at 3.5” WC for natural gas, but can be converted to LP by installing the regulator conversion kit included. The wiring connections, manual selector and adjustments are easily accessible on top of the valve. With a 3-9/16” swing radius, the 720 Series lends itself well to replacing many OEM valves. Valve can be mounted in any position except upside down.

Features and Benefits
Gas cock dial marking Off - Pilot - On
Pilot outlet 1/4” tubing
Ambient temperature of -40°F to 175°F
Combination screw/spade terminal type
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and LP/air mixtures
Multiple actuators available
RoHS compliant

700 Series - 24 Volt Combination
The Robertshaw® 700 Series 24 Volt Combination Gas Valves offer replacement flexibility. With capacities ranging to 720,000 BTU, three-position outlets and multi-positional capability, these combination gas valves offer unlimited replacement possibilities. The 24 Volt Uni-Kit® models are suitable for either natural or LP gas. The valve is factory set at 3.5” WC natural gas. A regulator cover plate is included to convert to LP gas.

Features and Benefits
Gas cock dial marking Off - Pilot - On
Pilot outlet 1/4” tubing
Ambient temperature of -40°F to 175°F
Combination screw/spade terminal type
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and LP/air mixtures
Multiple actuators available
RoHS compliant

The Robertshaw® Carbide Series Hot Surface Ignitors deliver dependable ignition in heating systems of every description: furnaces, boilers, rooftop heaters, infrared burners, unit heaters, water heaters, and many other types of HVAC equipment.

Features and Benefits

Made from high-purity recrystallized silicon carbide. (Crystar™) which combines physical and thermal strength with stable electrical properties
Designed to reach ignition temperature(s) within 17 seconds
Have 18-gauge nickel chrome lead wires embedded and metalized in place for maximum holding strength and electrical conductivity
Manufactured with lead wires enclosed in a special high-temperature fiberglass insulation providing electrical protection
Operate at 120V AC. Some modules are rated form 208/240V input, however, the voltage to the ignitor is stepped down to 120V AC

MAP-Pro™ 14.1 oz. hand torch cylinder contains premium fuel suited for a variety of job site projects. MAP-Pro works faster and more efficiently with a higher burn temperature than standard propane. This tank works well with Harris' air-fuel hand torches.

Features
Provides maximum heat output and transfer for more efficient use
Faster soldering times than Harris' propane cylinders
Flame temperature in air of 3730 degrees F (2054 degrees C)
Constructed of durable steel
Slim and lightweight cylinder is easy to grip and maneuver
250 PSI operating pressure
Use with Harris air-fuel hand torches
One year warranty

The Robertshaw® 1980 Series Snap-Fit® Thermocouples offer easy installation into the majority of pilot burners. They are manufactured without complicated adaptors, but with extra insulation that the brass sheath provides under high ambient temperatures.

Features and Benefits

Easy burner installation with attached threaded nut
Stainless steel outer jacket for long life and resistance to heat blistering
Combination of copper and nickel alloys for good electrical conductivity
Mica washer to insulate from shorting conditions
Tinnerman clip included
Various lengths available for multiple applications

Features
Features A421 Standard model
Control Front Panel LCD:
Displays the temperature, parameters, and status and allows you to adjust the backlight intensity for ambient light conditions. Custom icons display the system and control status.
Basic and Advanced Programming Menu:
Provides two levels of parameter adjustment and control setup, allowing you to set up advanced features in one menu and easily adjust basic parameters in the other menu.
On/Off Temperature Adjustment:
Allows you to select the temperature values at which the relay turns On and Off, which automatically defines the Heating or Cooling mode of operation.
Switch-Activated Temperature Setback:
Allows you to shift the On/Off temperature by an adjustable setback value. When a user-supplied switch closes the binary input control circuit, the control operates at the defined setback temperatures.
Adjustable Anti-Short Cycle Delay:
Allows you to select the minimum time the output relay remains off before the next on cycle; avoiding short cycling, hard starts, and nuisance overload outages on compressors and other inductive applications.
Adjustable Sensor Offset:
Allows you to adjust the displayed temperature to the actual sensed temperature.
Optional Restricted Adjustment Mode:
Allows you to restrict the On/Off adjustment to your defined temperature range.
Sensor Failure Mode:
Allows you to select the relay On/Off state in the event of a sensor or sensor wire failure.
Backlight Brightness Level:
Allows you to adjust the LCD backlight intensity.
Extra Features A421 Defrost model
Off-Cycle Defrost:
Allows you to shut off the refrigeration system for defined defrost time interval and frequency. You can also start or stop a manual only defrost offcycle.
Extra Features A421 Timer model
Free-Cooling and Ventilation:
Allows you to adjust for free-cooling and timed-ventilation, and provides over-cooling protection.

700 Series - 24 Volt Combination
The Robertshaw® 700 Series 24 Volt Combination Gas Valves offer replacement flexibility. With capacities ranging to 720,000 BTU, three-position outlets and multi-positional capability, these combination gas valves offer unlimited replacement possibilities. The 24 Volt Uni-Kit® models are suitable for either natural or LP gas. The valve is factory set at 3.5” WC natural gas. A regulator cover plate is included to convert to LP gas.

Features and Benefits
Gas cock dial marking Off - Pilot - On
Pilot outlet 1/4” tubing
Ambient temperature of -40°F to 175°F
Combination screw/spade terminal type
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and LP/air mixtures
Multiple actuators available
RoHS compliant

The Robertshaw® line of replacement gas dials for gas valves come in many colors with various options.

Features and Benefits

Replacement dial for use with Unitrol® 7000 gas valves
Beige color with O

The Robertshaw® 1980 Series Snap-Fit® Thermocouples offer easy installation into the majority of pilot burners. They are manufactured without complicated adaptors, but with extra insulation that the brass sheath provides under high ambient temperatures.

Features and Benefits

Easy burner installation with attached threaded nut
Stainless steel outer jacket for long life and resistance to heat blistering
Combination of copper and nickel alloys for good electrical conductivity
Mica washer to insulate from shorting conditions
Tinnerman clip included
Various lengths available for multiple applications

The Robertshaw® 720 Series 24 Volt Dual Gas Valve is a six-function gas valve incorporating a manual valve, safety shut-off magnet, dual automatic valves, main gas regulator, and pilot adjustment. Models are available with and without a pressure regulator. Uni-Kit® models are factory set at 3.5” WC for natural gas, but can be converted to LP by installing the regulator conversion kit included. The wiring connections, manual selector and adjustments are easily accessible on top of the valve. With a 3-9/16” swing radius, the 720 Series lends itself well to replacing many OEM valves. Valve can be mounted in any position except upside down.

Features and Benefits
Gas cock dial marking Off - Pilot - On
Pilot outlet 1/4” tubing
Ambient temperature of -40°F to 175°F
Combination screw/spade terminal type
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and
LP/air mixtures
Multiple actuators available
RoHS compliant

The Robertshaw® 720 Series Lever Actuated Gas Valves are designed for intermittent pilot ignition applications. This series incorporates a manual valve, pilot valve, dual automatic valves (2), and a main gas pressure regulator. Uni-Kit® models are factory set at 3.5” WC for natural gas, but can be converted to LP by installing the regulator conversion kit included. The 720 Series is designed for many residential applications such as central heating units, space heaters, wall heaters, boilers, and mobile home furnaces. This valve has a compact swing radius of only 3-9/16” to enable it to fit a wide range of OEM replacement applications.

Features and Benefits
Pilot outlet 1/4” tubing
1/4” quick connect terminal type
Ambient temperature of -40°F to 175°F
Maximum inlet pressure 14” WC (0.5 PSI)
Standard NEMA terminals
Rated as NEC Class 2
Inlet filtered screen
Various gas types: natural, manufactured, mixed, LP, and LP/air mixtures
RoHS compliant

Harris Propane 14.1 oz. hand torch cylinder is designed to fuel hand torches in order to complete a variety of job site projects. This tank works well with Harris' air-fuel hand torches.

Features
Ideal for small soldering applications, such as residential plumbing tube.
Constructed of durable steel
Slim and lightweight cylinder is easy to grip and maneuver
Flame temperature in air is 3600 degreesF (1982 degreesC)
Use with Harris air-fuel hand torches

Line service valve 1/8" copper tubing, wrench cap and core

Features/Benefits

⅛" Copper Tubing
Made of CDA 360 brass
Wrench Cap and Core

Line Service Valve 3/16" Copper Tubing, Wrench Cap and Core

Features/Benefits

3/16" Copper Tubing
Made of CDA 360 brass
Wrench Cap and Core

Fin whisk brush

Features/Benefits

Long lasting, sturdy Bristle Design

Line service valve 3/8" copper tubing, wrench cap and core

Features/Benefits

3/8" Copper Tubing
Made of CDA 360 brass
Wrench Cap and Core

Line service valve ¼" copper tubing, wrench cap and core

Features/Benefits

¼" Copper Tubing
Made of CDA 360 brass
Wrench Cap and Core

Line service valve 5/16" copper tubing, wrench cap and core

Features/Benefits

5/16" Copper Tubing
Made of CDA 360 brass
Wrench Cap and Core

The Copeland Scroll Digital Refrigeration compressor family is designed for superior efficiency and performance for low temperature applications.

Use this solenoid valve to accurately measure gas or liquid flowing through hoses. It can also manually or automatically charge or recover refrigerants.

Product Features
Meets OEM performance specifications
High performance synthetic PAG for R134a systems provides excellent resistance to moisture
Anti-Wear Agents and Friction Modifiers enhance compressor wear rates which extend compressor life
Anti-Oxidants protect system against formation of sludge which can shorten compressor life and reduce system efficiency
Contains UV Dye for Leak Detection
Low 46 cSt viscosity