Question about Paragon 8145-20 Defrost Timer

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I have a Paragon 8145-20 D-Frost-O Matic installed in on my walk-in freezer. The ice is accumulated on the fins of the freezer. Now it run for 11 minutes then stop for 3.5 minutes. I think the stop time is not long enough to defrost the ice. How can I set the defrost time longer?

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Gene Haynes

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1) Copy following links:
http://waterheatertimer.org/images/8145-work-image.jpg
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

2) Typically the 8145-20 defrost cycle is time-initiated and starts when tripper pin located on outer part of dial passes the time-of-day point.
Defrost cycle terminates or ends when pressure or temperature switch activates. This is also called the cycle limit switch.
http://waterheatertimer.org/images/8145-20-wiring-600.jpg

3) So your situation sounds like the pressure or temperature switch is not working correctly.

4) The 8145 timer also has 'time termination' setting. This red tripper is located on inner part of dial.
Usually the 'time termination' is used as back-up system if the pressure or temperature switch fails so that defrost cycle will not continue melting everything in freezer.

5) To solve problem until pressure-temperature switch is replaced, you can disconnect wire on terminal X, and then set 'time termination' for correct length of time by experimenting.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Posted on Dec 27, 2012

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Anonymous

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SOURCE: Set defrost timer on Paragon Electric Defrost-O-Matic

the problem is not necessarily with the timer. it seems you have more than ample time and time allocations to perform a complete defrost. most walk ins should have roughly 25-40 minutes of defrost every 4 to 8 hours. if you defrost with a heating element, you may have a problem with the strength of the element,or the element may be pulled away from the coil. you could also have a problem with the defrost thermostat(allowing the defrost to terminate prematurely)

Posted on Jun 17, 2009

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