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White plastic purge pump unit with timer and drain hose

Essick Air Products

Essick Air Products CM120B thermostat

SKU CH-5JFP-ARPFC MPN CM120B

Purges evaporative coolers up to 6500 CFM on a timed cycle every six hours

  • TypeLearning Thermostats
  • Automatically purges cooler every six hours
  • 120 V motor drives reliable pump operation
  • Handles evaporative coolers up to 6500 CFM
  • UL listed for verified electrical safety
  • Complete kit includes pump hose and timer

Product identity

The Essick Air Products CM120B is a learning thermostat designed for evaporative coolers rated up to 6500 CFM. It automates the purge cycle so the cooler drains at regular intervals without manual intervention. The unit operates on standard 120V household power and targets installers or facility managers who want scheduled drainage for large coolers.

Build and connections

A plastic housing encloses a motor with a steel shaft for durability in damp environments. The pump connects directly to the cooler’s drain port using the supplied hose, and the integrated timer mounts alongside existing 120V wiring. UL listing confirms the assembly meets recognised safety requirements for permanent installation.

Included accessories

The package supplies the purge pump, a drain hose and a programmable timer that triggers a four to six minute purge every six hours. These components eliminate the need to source separate plumbing or control parts. No additional software or wireless modules are provided, so operation remains fully hardwired and timer-driven.

Highlights

  • Automatically purges cooler every six hours
  • 120 V motor drives reliable pump operation
  • Handles evaporative coolers up to 6500 CFM
  • UL listed for verified electrical safety
  • Complete kit includes pump hose and timer

Specifications

BrandEssick Air Products
ModelCM120B
TypeLearning Thermostats

Questions about this item

What voltage does the CM120B purge pump require?

The CM120B purge pump operates on 120V power for use with evaporative coolers.

What cooler capacity does the CM120B support for mounting?

The CM120B is designed for evaporative coolers rated up to 6500 CFM.

How do I set the timed purge cycle on the CM120B?

The included timer provides a 4 to 6 minute purge every 6 hours automatically once installed.

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