Question about Paragon 8145-20 Defrost Timer

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Paragon 8145-00 Defrost Timer not going into defrost cycle

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 2 Answers

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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kellysystems

  • 52 Answers

SOURCE: install and use Paragon 8145 defrost timer

try the uniline website

Posted on Feb 26, 2010

rrrick40

  • 1 Answer

SOURCE: My coolers went down at my store. We installed a

how to wire a timer  8145-20  for a cooler

Posted on Jun 14, 2010

martyparagon

  • 16 Answers

SOURCE: I have installed 3 paragon

You need someone to come in and trace the wiring if you cannot figure it out. You said you had the Paragon wiring diagram already, if not the link below can be used.

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

This defrost time can be used for both hot gas and electric heater defrosting so check to see which defrost type is being used.

Posted on Nov 13, 2010

Anonymous

SOURCE: I have a paragon 8145-20 defrost timer. do you

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.

Posted on Jan 20, 2011

Testimonial: "good info very helpful thank you"

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1 Answer

The unit I'm working on has a 1 month old 8145-20ex and now the unit wont go into defrost - The compressor and the evap do not stop and the heaters do not energize. I'm thinking the defrost termination...


Copy following links:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#8145
http://waterheatertimer.org/pdf/How-to-test-Paragon-8145-timer.pdf
8145-20 is 240Volt defrost timer.
The defrost cycle will not begin. This implies that trippers are not in place, or trippers are worn out.... or limit switch is stuck ON or solenoid inside timer has gone bad.
Test across terminal N to X for 240Volt. Because voltage here will stop defrost cycle by activating solenoid inside timer, but continuous voltage will also stop next defrost cycle from beginning. Disconnect wire on terminal X and see if defrost cycle will begin at next tripper. If defrost begins, then limit switch is bad.
Gene
h

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

Aug 06, 2013 | Hardware & Accessories

1 Answer

I WANT TO BYPASS THE DEFROST MODE IN MODEL 8145-20


Unsure what you are trying to do.
Open following link to see how this timer works and how to wire it.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#8145

If you want to by-pass defrost cycle, remove trippers from dial and timer will not enter defrost state.
Or remove wire that is connected to terminal 3.

Oct 07, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

Without doing the minimal setting test to see if a time clock works how do you test a time clock with defrost termination the x terminal


8145-20 is 240Volt defrost timer:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#8045

You are testing the 8145-20 timer.
The timer dial should rotate continuously. Trippers on dial rotate around. When they reach the trip switch, the timer starts the defrost cycle.
Terminal 3 has power during defrost cycle.
Terminal 4 has no power during defrost cycle.
With 240Volt timer, terminals 1 and 2 and N and X test for live power to ground at all times.

The limit switch is connected to terminal X and to terminal N.
During the defrost cycle, the limit switch measures the pressure or temperature.
When pressure or temperature reaches the set point, the limit switch closes the circuit and this trips the solenoid inside timer. The solenoid turns off the timer relay, and the defrost cycle ends.
At this point the timer turns off the defrost, and sends power to the refrigeration.
Terminal 3 has no power during refrigeration cycle. (The opposite of defrost cycle).
Terminal 4 has power during refrigeration cycle.
Test these terminals for power to ground. One or the other should have power at all times, but not both.

If timer will not enter defrost cycle, make sure the X-3596 trippers are not worn down.
Disconnect the wire to terminal X and see if defrost cycle will start.
Test terminals 3 and 4 again and see if removing wire from X caused a change.

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Sep 14, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

What is the purpose of the solenoid.


You posted under Paragon 8145-20 defrost timer
The solenoid resets timer, and ends defrost cycle when pressure or temperature switch calls for termination.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#8145

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Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
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Mar 05, 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

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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.
Fixya is always less expensive than a service call.

Feb 11, 2011 | Paragon 8145-20 Defrost Timer

1 Answer

Where do i wire the # 4 terminal in the contactor


You posted under 8145-20 timer.
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost
If this is not your timer then add a comment.

#4 terminal is wired to the fan.
This is NC terminal, so fan is ON at all times except when timer goes into defrost cycle.
geno_3245_239.jpg

Jan 10, 2011 | 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

On a Paragon 8145-20 Defrost Timer, I know you land the refrigeration circuit on terminal 4, the heater on terminal 3, but what goes on terminal "X" and terminal "N"


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.

Aug 01, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

I have installed 3 paragon timers and this is the first to give me trouble. When the defrost cycle started it did cut off but the timer was stuck on defrost. Many techs have done strange things to the...


You need someone to come in and trace the wiring if you cannot figure it out. You said you had the Paragon wiring diagram already, if not the link below can be used.

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

This defrost time can be used for both hot gas and electric heater defrosting so check to see which defrost type is being used.

Feb 05, 2010 | 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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