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

This scale measures up to 220 lbs (100 kg). It may be used in either manual or programmable mode.

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

Size: 10 X 10 X 1

Size: 12 X 12 X 1

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

KVP/KVL/KVR/NRD/KVC/CPCE - Pressure Regulators
Danfoss has a variety of pressure regulators to control the low and
high pressure sides and efficient function of a refrigeration system
under varying load conditions.
Pressure regulators include:
• Evaporator Pressure Regulator (KVP)
• Crankcase Pressure Regulator (KVL)
• Condensing Pressure Regulator (KVR)
• Differential Pressure Regulator (NRD)
• Hot Gas Bypass Valves (KVC/CPCE)

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 Ranco® ETC Series Electronic Temperature Control offers a full-featured electronic replacement for electrical-mechanical temperature controls used in many commercial refrigeration applications. With its wide temperature range, one and two stage capability, selectable heating/cooling modes and multi-voltage input, the ETC is designed to provide application flexibility. Models available include 120/208/240V AC and 24V AC.

Features and Benefits

Anti-short cycle compressor delay for cooling applications
Wide temperature range (-30°F to 220°F) (-34.4°C to 104.4°C)
Wide differential adjustment (1°F to 30°F) (-17°C to -1°C)
LCD read-out for sensor temperature, control settings, and relay status
High Amp output relay (FLA 16 Amps @ 120V AC and 8 Amps @ 208/240V AC) single stage
EEPROM memory retains control settings during power outages
Keypad lockout to prevent end-user alteration of settings
8 foot lead with sensor is extendable up to 400 feet using 18 or 22-gauge thermostat wire
Easy 4-step set-up
Heavy-duty relay is 1 HP rated
Selectable °F or °C heating/cooling modes
Single and two stage models
NEMA 1 case and cover
NEMA 4X models available
White backlight on display
Sensor rated IP67 for dust and water (<1m) resistance

The Ranco® ETC Series Electronic Temperature Control offers a full-featured electronic replacement for electrical-mechanical temperature controls used in many commercial refrigeration applications. With its wide temperature range, one and two stage capability, selectable heating/cooling modes and multi-voltage input, the ETC is designed to provide application flexibility.

Features and Benefits

Anti-short cycle compressor delay for cooling applications
Wide temperature range (-30°F to 220°F) (-34.4°C to 104.4°C)
Wide differential adjustment (1°F to 30°F)
LCD read-out for sensor temperature, control settings, and relay status
High Amp output relay (FLA 16 Amps @ 120V AC and 8 Amps @ 208/240V AC) single stage
EEPROM memory retains control settings during power outages
Keypad lockout to prevent end-user alteration of settings
8 foot lead with sensor is extendable up to 400 feet using 18 or 22-gauge thermostat wire
Easy 4-step set-up
Heavy-duty relay is 1 HP rated
Selectable °F or °C heating/cooling modes
Single and two stage models
NEMA 1 case and cover
NEMA 4X models available
White backlight on display
Sensor rated IP67 for dust and water (<1m) resistance

HEAT BLOCKING PUTTY
This reusable heat blocking putty keeps piping and sensitive components cooler than traditional wet rag applications during brazing, soldering, or welding. It is made from the same materials found in the heat shield of the space shuttle. Simply apply, remove, and reuse.

Reusable up to 40 Times
Withstands Temperatures over 2000 °F
Blocks Direct and Conductive Heat
Indicator Dye Fades as Product Wears Out

PURE CONCENTRATE COIL CLEANER
Restore neglected and extremely dirty coils to their original performance with our pure concentrate, non-acid, high foaming coil brightener. This product’s alkaline nature will strip coils of heavily embedded grease and grime, restoring the metal to a bright “like new” shine. Our coil brightener is maximum strength and should only be used by skilled HVAC/R professionals.

Brightens coils to a like new shine
High Foaming
Non-Acid
Lightweight pure concentrate

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

EVR Version 2 - Solenoid Valves
EVR Version 2 solenoid valves are direct or servo-operated solenoid valves for liquid, suction, and hot gas lines. They are suitable for all
refrigeration, freezing, and air conditioning applications and are compatible with fuorinated refrigerants. The valves can be delivered as
normally open or closed as well as with or without manual operation.

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