Question about Paragon 8145-20 Defrost Timer

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Paragon 8145-20 defrost timer

Howzit.

I just refurbished a similar size walk in coolroom which had the same defrost timer. The plant is a mix match of different components it worked now its frozen solid after a day of cooling at 3 deg celsius. The evaporator has a element heating set not sure if they are ok, will test them. My actual question is the thermostat, should I put the thermostat with NC, NO swithes close to the outgoing air side of the evaporator? Also once I replace the coil of the 8145-20 timer, setting it up for defrost, do I need the heating elements or can I just prolong the off time without any electrical or hot gas method or will that be counter productive for my coolroom?

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I am not professional at commercial refrigeration, and can't answer your question directly.
However, you can see 8145-20 240V defrost timer wiring diagrams and manuals on following link.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

8145 timer is time initiated, and pressure/temperature terminated, with back-up time termination.

Posted on Feb 06, 2011

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Posted on Jan 02, 2017

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http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

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Bills Refrigeration/Montana.

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