Top 20 Paragon 8145-20 Defrost Timer Questions & Answers


http://waterheatertimer.org/Paragon-timers-and-manuals.html#8145
If dial is rotating and keeping good time each day, then Trippers might be bad?
Test across terminals 1 and N for 240Volt... if you are not getting 240V, the flip breaker fully off and then fully on. Test for 240V again.
Temporarily disconnect wire on terminal 4, and then temporarily move wire on Terminal 3 to Terminal 1 and see if your defrost heater is working. Heater might be bad.
Disconnect wire on terminal X and see if timer resets.
Buy new timer

Gene

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Paragon 8145-20... | 248 views | 0 helpful votes


Is this a hot gas bypass defroster with a switching valve? If so, the compressor should be on.

Paragon 8145-20... | 89 views | 0 helpful votes


http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost
Link has infromation about paragon 8145-20 240 volt timer
gene
Water Heater Timers Save Money

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

Install defrost trippers on dial at times you want defrost to begin.
8145-20 is generally time initiated, and temperature or pressure terminated... but you can set the defrost duration on smaller center dial..and this setting will terminated defrost cycle mechanically if the pressure or temperature sensor fail. Then manually rotate timer dial until current time lines up with time marker in upper left side.

Gene
h.

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Paragon 8145-20... | 169 views | 0 helpful votes


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

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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.

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Paragon 8145-20... | 431 views | 2 helpful votes


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

Paragon 8145-20... | 607 views | 0 helpful votes


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.

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Paragon 8145-20... | 330 views | 0 helpful votes


10-19-12
Each timer has a contactor.
Timers can also control a contactor.
Which timer do you have?

Here are contactors, with some illustrations showing tiimers controlling contactor:
http://waterheatertimer.org/H230A.html

Here are example timers controlling a 3-pole contactor for 3-phase application:
http://waterheatertimer.org/How-to-install-3-phase-timer.html

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Paragon 8145-20... | 204 views | 0 helpful votes


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

Paragon 8145-20... | 584 views | 0 helpful votes


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.

Paragon 8145-20... | 480 views | 0 helpful votes


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.

Add a comment for more help

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Paragon 8145-20... | 380 views | 0 helpful votes


Thank you for including model number of timer.
Paragon P100 series uses X9242 trippers
http://waterheatertimer.org/Paragon-timers-and-manuals.html

Midnight electric appears to sell X9242 tripper
http://www.midlightelectric.com/firex/acatalog/FIREXPARAGONROBERTSHAW_X9242.html

Paragon 8145-20... | 317 views | 0 helpful votes


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

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Open following links for 8145-20 wiring diagram and resources:
http://waterheatertimer.org/images/8145-20-wiring-350.jpg
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

8145-20 is 240Volt defrost timer.
Heat strip and compressor should not activate at same time.
As a general rule heater connects to NO terminal 3 and compressor connects to NC terminal 4
NC terminal 3 compressor is on all the time until defrost cycle begins.
NO terminal 4 heat turns on when defrost cycle begins, and at same time NC terminal 3 compressor turns off.
At then end of the defrost cycle, NO terminal heat turns off and NC terminal 3 compressor turns on again.

Paragon 8145-20... | 315 views | 0 helpful votes


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.
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