Skip to main content.
We are currently working on making our websites more accessible. If you have any issues navigating our site, please feel free to contact us via phone at 910-594-0219 and ask for the web ordering department.
Close
Show your wishlist 0
You have no items in your shopping cart.
Search
Filters
The A421 Series control is a single stage, electronic temperature control thermostat with a single-pole, double-throw (SPDT) output relay and a NEMA 4X housing.
SKU: 59600D
$112.93

The A421 Series control is a single stage, electronic temperature control thermostat with a single-pole, double-throw (SPDT) output relay and a NEMA 4X IP66 housing.

Features:

  • Single Stage
  • SPDT output relay
  • Easy-to-Read LCD temperature display
  • Lockable front-panel display for set up and adjustment
  • 120/240V
  • Can display both Farenheit and Celsius measurments
  • Includes an A99BB-25C temperature sensor with 9-7/8 inch (0.25 m) cable. Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
  • Longer sensor cable options are available in related
    products below

Applications:

The A421 Electronic Temperature Control can be used to control a wide variety of single-stage refrigeration or HVAC equipment. Sample temperature control applications include:

  • temperature monitoring and alarming
  • on/off control of boilers and chillers
  • boiler and chiller pump control
  • heating or cooling control
  • cooling tower fan control based on water temperature
  • supply, makeup, and mixed air temperature control
  • temperature actuated valve control
  • supply and makeup air damper and fan control
  • condenser fan control based on condenser temperature

A421 Series Thermostat Installation & Operation Manual

The A421 Series control is a single stage, electronic temperature control thermostat with a single-pole, double-throw (SPDT) output relay and a NEMA 4X IP66 housing.

Features:

  • Single Stage
  • SPDT output relay
  • Easy-to-Read LCD temperature display
  • Lockable front-panel display for set up and adjustment
  • 120/240V
  • Can display both Farenheit and Celsius measurments
  • Includes an A99BB-25C temperature sensor with 9-7/8 inch (0.25 m) cable. Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
  • Longer sensor cable options are available in related
    products below

Applications:

The A421 Electronic Temperature Control can be used to control a wide variety of single-stage refrigeration or HVAC equipment. Sample temperature control applications include:

  • temperature monitoring and alarming
  • on/off control of boilers and chillers
  • boiler and chiller pump control
  • heating or cooling control
  • cooling tower fan control based on water temperature
  • supply, makeup, and mixed air temperature control
  • temperature actuated valve control
  • supply and makeup air damper and fan control
  • condenser fan control based on condenser temperature

A421 Series Thermostat Installation & Operation Manual

Write your own review
  • Bad
  • Excellent
Customers who bought this item also bought

Plasson® 1/4" Swivel Adaptor

Replacement 1/4" swivel adaptor for all Plasson® bell drinkers.
$0.79

Plasson® Mechanism Top Cap - Breeder

Replacement top cap for Plasson® Breeder drinker.
$2.85

Plasson® Valve Housing - Breeder

Replacement valve housing for Breeder drinker valve assembly. (52824)
$1.19