The Ranco® A12 and 9531 Series Constant Cut-in Temperature Controls are designed to switch electrical components of refrigeration systems in response to sensed temperatures.

Features and Benefits

Laser-welded stainless steel bellows
Fixed or adjustable temperature settings
High-amperage contacts
Pneumatic action provided by vapor-filled capillary or capillary with bulb sensing elements
Constant On or Off positions available
Choice of mounting brackets, adjustment ranges and cams, and slotted or flatted shafts
Standard 1/4” quick-connect terminals with optional screw terminals

The Ranco® A12 and 9531 Series Constant Cut-in Temperature Controls are designed to switch electrical components of refrigeration systems in response to sensed temperatures.

Features and Benefits

Laser-welded stainless steel bellows
Fixed or adjustable temperature settings
High-amperage contacts
Pneumatic action provided by vapor-filled capillary or capillary with bulb sensing elements
Constant On or Off positions available
Choice of mounting brackets, adjustment ranges and cams, and slotted or flatted shafts
Standard 1/4” quick-connect terminals with optional screw terminals

The Ranco® A12 and 9531 Series Constant Cut-in Temperature Controls are designed to switch electrical components of refrigeration systems in response to sensed temperatures.

Features and Benefits

Laser-welded stainless steel bellows
Fixed or adjustable temperature settings
High-amperage contacts
Pneumatic action provided by vapor-filled capillary or capillary with bulb sensing elements
Constant On or Off positions available
Choice of mounting brackets, adjustment ranges and cams, and slotted or flatted shafts
Standard 1/4” quick-connect terminals with optional screw terminals

The Ranco® A12 and 9531 Series Constant Cut-in Temperature Controls are designed to switch electrical components of refrigeration systems in response to sensed temperatures.

Features and Benefits

Laser-welded stainless steel bellows
Fixed or adjustable temperature settings
High-amperage contacts
Pneumatic action provided by vapor-filled capillary or capillary with bulb sensing elements
Constant On or Off positions available
Choice of mounting brackets, adjustment ranges and cams, and slotted or flatted shafts
Standard 1/4” quick-connect terminals with optional screw terminals

Features and Benefits
Single relay output combined with a cyclical timer for system defrosting.
A manual defrost can be set through the controller or via manual shutdown of the refrigeration system.

The TC-900E Series Controllers operate with two sensors, one for room temperature and the other fastened to the evaporator to control defrost and fan functions.

Features and Benefits
The TC-900E Digital Controllers automate the defrost process according to the needs of facilities defrost cycles while providing energy savings.
Adaptive defrost capable for energy savings
Adaptive defrost can be less harsh on inventories eliminating unneeded defrost cycles
Fast freezing better protects inventorie

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. 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. 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

The Ranco® Varifix International Cold Controls are designed for fast and easy service replacements. They are available for both refrigerator and freezer applications.

Features and Benefits

Trusted brand
Capillary is crimped and sealed for maximum reliability
High level of performance
Complete kit includes all necessary hardware

The Ranco® Varifix International Cold Controls are designed for fast and easy service replacements. They are available for both refrigerator and freezer applications.

Features and Benefits

Trusted brand
Capillary is crimped and sealed for maximum reliability
High level of performance
Complete kit includes all necessary hardware

The Ranco® Varifix International Cold Controls are designed for fast and easy service replacements. They are available for both refrigerator and freezer applications.

Features and Benefits

Trusted brand
Capillary is crimped and sealed for maximum reliability
High level of performance
Complete kit includes all necessary hardware

The Ranco® Wide Range O Series Temperature Controls provide a wide selection of controls customized to allow users exact adjustments within manufacturers' limits. The Ranco O Series features heavy-duty plated steel frames, non-conductive covers with front-located captive cover screws, raised screw terminals for fully accessible wiring, and large easy-to-read scales. Recognizing the need for flexibility in design of refrigeration equipment, these controls offer a wide selection for such products as self-contained refrigerators, freezers, coolers, walk-in units, and refrigeration display cases.

Features and Benefits

Maximum adjustment accuracy with 7 revolution range adjustment screws
NEMA 1 enclosure with non-conductive cover
Universal mounting and compact design
Laser-welded bellows for extended life
Wide range adjustable differential
The O60 Series have these additional features:

10 times setting sensitivity of most other wide range controls (O60 series only)
Gas-filled, nonposition-sensitive bulb (O60 series only)
Cap included on all Australia temperature controls. Optional for all other regions.

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 1HP 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 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 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.

-30/100F, DIFF 3 - 12 ADJ, 8' CAP, SPDT, NEMA 13/8 X 4 BULB

These thermostats are available with fixed or adjustable differential.
The various control ranges cover a broad range of temperature applications with a minimum number of models.
On request a built-in high or low limit stop is possible and can be adjusted quickly and easily in the field.
All models have a universal way of adjustment.
For this purpose a knob and sealing cap are enclosed.
All are equiped with IP30 enclosure

DIFF 3-12 ADJ,6' CAP, SPST, NEMA 1,3/8 X 4 BULB, OPEN LOW

These thermostats are available with fixed or adjustable differential.
The various control ranges cover a broad range of temperature applications with a minimum number of models.
On request a built-in high or low limit stop is possible and can be adjusted quickly and easily in the field.
All models have a universal way of adjustment.
For this purpose a knob and sealing cap are enclosed.
All are equiped with IP30 enclosure.

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.