115 volt Cooler Control & Thermostat Retrofit Kit For Mastercool Plus or Contractors Series

(14 reviews) Write a Review
4.00 LBS
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Product Overview

For 115 volt application.

This kit can be used to replace the interior control box and thermostat combination on the Mastercool Plus or Mastercool Contractor's Series Cooler, some of which are now obsolete, including #P225101A, P225102A, P218301A, P218601A.
This kit consists of a new control box to be mounted on the outside of the cooler, a new plug receptacle box with wire leads for the inside of the cooler, a new 115 volt motor cord, and a new digital thermostat for inside the house. Requires rewiring of new plug receptacle box to new control box. Disconnect all power before attempting. Read all directions. Level of difficulty:medium.

You can read the control box and thermostat owner's/installation manual here.

Wiring schematic for 115 volt

To maintain use of purge pump feature with standard pump, we recommend purchasing also an additional pump receptacle to tie in to the new control box.
115 volt pump receptacle.

New cooler control is Dial part #7624. Features include:
Digital Evaporative Cooler Control with Thermostat
2 Speed 1/3 to 1 HP 115V/230V
Automatic start and stop for temperature comfort.
Automatically pad pre-wet.
Automatically adjusts from High to Low speed
Digital display with separate controller in water proof box.
Optional 2 / 4 / 8 hour timer.
Optional dump feature. (Use an extra standard cooler pump for timed water purge, like a Clean Machine.)
Motor rated 1HP @ 115V, 2HP @ 230V
Pump rated 2A @ 115VAC and 1A @ 230VAC
UL listed.

Replaces P225101A, RK301A


(14 reviews) Write a Review

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  • 3
    I guess this is a "one size fits all" fix. my problem was there wasn't adequate room to install the box in the vertical position so I mounted it horizontally on the top of myHPC640E cooler, sealing the perimeter and hoping the cover is actually wate

    Posted by Lee Mac Millan on Jul 31st 2019

    Had to call the "Salesman" as I couldn't ascertain the unit was acceptable in the horizontal position-otherwise no hitches.

  • 5
    Cooler Kit

    Posted by John Quintana on Jul 25th 2019

    It all appears to work well. I installed it on July 24, 2019 and I appreciated your phone call to clear up a non existent problem

  • 5
    Controller/thermostat kit for MasterCool plus

    Posted by Angel Vargas on Aug 22nd 2018

    So far so good... This unit is working excellently... Hopefully it will last many years.... I would recommend it highly... Contractors should be made aware of its existence...

  • 5
    110 volt Evap Control Box

    Posted by Patrick Pinnick on Jun 8th 2018

    Worked out great. This item is a newer design to my old box, so some rewiring was required. I'm not an electrician, just your average DYI homeowner. With average intelligence and following the wiring diagram, this was a simple job.

  • 5
    Great product

    Posted by Zurf on Jun 28th 2017

    I am a JW electrician. This was a fairly easy installation for me. I could see that it could be difficult for a home owner. Fired right up and worked perfectly. Thermostat is very functional.