Question about Paragon 8145-20 Defrost Timer

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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 rooftop unit has power going to it already. The freezer was installed for future use, now they want to hook it up. Thanks

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1 Answer

Anonymous

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.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
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Posted on Feb 11, 2011

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How to set the defrost duration on a timer


Copy following link for defrost timers:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

There are 2 general types defrost timers.
Time activated - Time terminated
Time activated - Temperature-pressure terminated, with timed termination back-up

Here is basic image:
http://waterheatertimer.org/images/8145-work-image.jpg
Rotate dial until current time lines up with pointer, insert tripper pin on outside edge of dial to select defrost start-time, move defrost duration tripper on inner dial to set termination time.

Each defrost timer is slightly different:
If timer is time-terminated, then wiring follows certain diagram.
If timer is temperature-pressure terminated, then different wiring diagram is used.

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

Nov 11, 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

Need a wiring digram for a pargon5x455 defroist timer


5x455 is WW Grainger number for 240Volt time initiated - time terminated Paragon 8045-20 timer.
Open following links to identify timer and download wiring diagram:

http://www.grainger.com/Grainger/PARAGON-Time-InitiatedTime-Terminated-Defrost-5X454?Pid=search
http://waterheatertimer.org/Paragon-timers-and-manuals.html#8045

Aug 21, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

I need a three phase wiring diagram for 8145-20 model timer.


8145-20 240Volt Paragon timer is not 3-phase.
Clock motor is 240V.
You need a transformer to convert 3-phase to single phase 240V to operate timer.
Then timer outputs can control 3-phase power using 3-phase contactors
Contactor below is 3 phase with 240V coil
http://www.grainger.com/Grainger/DAYTON-Contactor-2UTP7?Pid=search

Defrost timer wiring diagrams show below:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

Dec 21, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

I have a paragon 8145-20 defrost timer. do you wire the compressor to the timer? I cant seem to find a wiring diagram on how to wire this correctly


Link below has wiring diagrams and wiring manuals for 240V 8145-20
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

I am not expert installing defrost timers.
According to information from Paragon, 8145 is for hot gas defrosting. 8140 series are time initiated, and pressure-or-temperature terminated.
Wiring diagram does not show compressor wired to timer.

The cycle works like this:
Timer is running but defrost is not switched ON.
Fan is ON.
Timer switches ON and activates defrost cycle.
Fan turns OFF. Hot gas valve turns ON for defrosting.
Cycle limit switch is temperature or pressure sensitive.
Cycle limit switch reaches trip point, timer switches OFF.
Hot gas valve turns OFF. Fan turns ON.
So fan is off during defrost cycle.
Hot gas valve turns ON when timer switches ON.
Timer is switched OFF by pressure-or-temperature limit switch.

Dec 09, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

I need wiring diagram for Paragon 8154-20. The plastic board has melted


I think you have the 8145-20 240V
This is a time-initiated defrost timer

Paragon 8145 page
http://www.uni-line.com/modules/catalog/SearchResults.aspx?mode=productsearch&prodID=8145

Wiring for 8145
http://www.uni-line.com/images/docs/refrigeration-8140series-wiring.jpg

Wiring diagram shows both 120V and 240V
L1 L2 is 240V
L N is 120V

090794f.jpg

Website that explains defrost cycle
http://www.appliance411.com/faq/howdefrostworks.shtml

Oct 11, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

I have a bad Paragon 8145-20 its Sunday all I have in stock is a Paragon 8045-20. I know voltage is the same. Will the 8045-20 work? What is the difference betweentime out and temperature out. If the...


See wiring diagrams and manuals at following link:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

8145-20 is 240V time initiated, pressure or temperature terminated with back-up time termination.
8045-20 is 240V time initiated, time terminated.

So 8145-20 has pressure or temperature limit switch that connects to terminal X that turns timer off, and ends defrost cycle. This timer is for hot gas defroster that has pressure/temperature limits. Check and see what the back-up time termination is set at on 8145-20. Look at small inner dial.

The 8045-20 timer does not use pressure/temperature limit switch, and instead you have to estimate length of time you want defrost cycle to run, and set inner dial to that time. Use same time as back-up time termination on 8145-20. Of course the pressure/temperature limits would not be exact and defrost cycle might not work correctly.

Here's the change-over wiring from 8145-20 to 8045-20.
There are other wiring variants depending on equipment.
240V hot wires from breaker box are L1 and L2
a) 8145-20 L1 is at terminal 1 > move L1 to terminal N on 8045-20
8145-20 L2 is at terminal N > move L2 to terminal X on 8045-20

b) 8145-20 hot gas defroster is at NO terminal 3 > move defroster to NO terminal 3 on 8045-20
Complete the 240 circuit to defroster by connecting to L2 at terminal X

c) 8145-20 refrigeration is at NC terminal 4 > move refrigeration to NC terminal 4 on 8045-20
Complete the 240 circuit to refrigeration by connecting to L2 at terminal X

Sep 12, 2010 | Paragon 8145-20 Defrost Timer

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