Question about Paragon 8145-20 Defrost Timer

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I have a walk in freezer heatcraft evap that was working fine til the defrost timer went bad. changed timer 8045-20 paragon with identical timer. now it goes into defrost but heating elements won'

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Posted on Jan 02, 2017

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Anonymous

SOURCE: On a Paragon 8145-20 Defrost

Link below has 8145-20 wiring diagram:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

Terminal N is 2nd wire needed to complete circuit.
In 240V 8145-20, there are two hot wires.
One Hot connects to terminal 1, with jumper to terminal 2.
Second Hot connects to terminal N, and this will power the clock motor and timer.
Terminal X is for temperature or pressure termination switch.

Defrost cycle works like this:
Timer is running but switched OFF.
Refrigeration fan is ON.
Timer switches ON, defrost cycle begins.
Refrigeration fan turns OFF.
Hot gas defrost turns ON.
When temperature-or-pressure limit switch reaches trip point, it switches timer OFF.
Refrigeration fan turns ON again.
Hot gas defrost turns OFF.

Posted on Jan 20, 2011

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Anonymous

SOURCE: What purpose does the solenoid

The solenoid switches timer OFF when temperature-or-pressure limit switch reaches trip point.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

Posted on Jan 20, 2011

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1 Answer

Wiring walk freezer


Copy following link to identify defrost timer.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost
Add a comment and say which defrost timer you have, which voltage and phase the incoming line

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

Jun 11, 2013 | Paragon 8145-20 Defrost Timer

1 Answer

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...


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

Dec 27, 2012 | Paragon 8145-20 Defrost Timer

1 Answer

How to wire a paragon defrost timer with liquid line solenoid valve t-stat electric heater for walk in freezer


page 20 in the heatcraft refrigeration manual shows how to interface a paragon defrost timer with the t-stat and evaporator coil.

Oct 21, 2012 | Paragon 8145-20 Defrost Timer

1 Answer

Wiring a defrost timer to a heatcraft condensing unit


Which defrost timer do you have?
Do you have time or temperature termination?
What voltage are you working with?
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

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

Aug 17, 2012 | Paragon 8145-20 Defrost Timer

1 Answer

My freezer timer went out part #8145-20 how much is this part


Web search for 'Paragon 8145-20'
Pex supply sells 8145-20 240Volt defrost timer for $116, and Grainger for $180

Open following link for manual, wiring diagrams, and other defrost resources.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost
Take a photo of wiring before starting crossover to new timer

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
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May 20, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

I'm looking for a control wiring diagram for this set up; The condenser is on the roof with a paragon 8145-20 in it. I want to control the defrost cycle of the walk in freezer that is downstairs. The...


Open following link to see wiring diagram and manual for Paragon defrost timers:
8145-20 is 240V time-initiated, pressure or temperature terminated, with back-up time termination.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

Add a comment for more free help.
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For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 11, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

MY 8145-20 DEFROST TIMER WILL NOT ADVANCE,


I am not sure of your wiring but see no reason that you could not run straight from the breaker to the timer and the timer to the freezer. Determine how long you want the defrost time to be on each hour and set the pegs accordingly. This is if I understand or picture your timer correctly. You have a walk in Freezer, and a rather large box 110 volt timer,correct? The pins on the 24 hour timer wheel can be taken off or moved? If I am wrong, I am sorry. I have the wrong picture in mind. 

Feb 16, 2009 | Paragon 8145-20 Defrost Timer

3 Answers

Set defrost timer on Paragon Electric Defrost-O-Matic


If the air flow and temperature are not being compromised leave it alone. If there is a gradual build up of ice on the evaporator you may have a defrost element or defrost limit switch problem. Set the defrost duration duration to 45 minutes and see if that solves the icing problem. 4 defrost cycles a day should be enough to keep the icing problem at bay. 3 defrost cycles at night about 1 hour apart may also remedy the problem. Experiment until you find the right combination of defrost cycles for your freezer. Watch for any thawing of the product in the freezer and adjust accordingly.
Bills Refrigeration/Montana.

Nov 14, 2008 | Paragon 8145-20 Defrost Timer

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