Very pragmatic with practical eye on what is going on. Though I am a novice I will give you 10 out of 10. May God bless you for your good intentions.Nice guy.
This helped me out on a long hard day where i found myself confused and frustrated on a job. Came home to do some learning and this really did the trick.
excellent video Charles. I'm 7 years too late, but it still is a great teaching tool. Thank you for sharing your knowledge. This is so very well displayed. Thank you!
I’m 3 min into the video so far very informative. Just wanted to tell you the symbol for your limit switch is backwards. Should be above the decimal. They way you have it drawn indicates the switch opens on temperature fall and closes on temperature rises you want it to open on temperature rise and close on temperature fall. Just some constructive criticism. Keep up the great work!
Charles. Great video!!!! I have a question. How is the compressor able to accomplish pump down of the system,when I switch from 2-4 refrigeration contact to defrost 1-3 (now closed)? I can't see it how it's done,since evaporator,thermostat and solenoid are all in series on the same circuit,namely 2-4. By switching from 2-4 contact to 1-3 contact now energized, I de-energize the solenoid,now closing and pump down can't be accomplished by the compressor. Please help me understand this problem. Thank you
The compressor is not part of this circuit. Only the solenoid that controls flow of refrigerant. Once the solenoid closes the condenser still runs pumping the system down. Eventually the low pressure switch on the condensing unit triggers and opens the circuit shutting down the compressor.
When I go to Sam’s Club, I noticed that sometimes the evaporator fans in the coolers holding the frozen foods are off. I assume that when the fans are off, the evaporators must be in defrost mode as you have described in this video. However, when I look at the evaporators in the refrigerated (non-frozen) foods cooler, those fans are always on (never off). What defrost system do you think the evaporators in the refrigerated foods cooler have which does not require the fans to go off? Or is that the fans do go off in defrost mode, because of the warmer temperature that the refrigerated foods cooler is in, the defrost cycle does not happen as often?
Some air defrost walk in coolers do not have electric heater. Most fans in these coolers are always on. Here is the walk in cooler which is air defrosted. www.johnstonesupply.com/storefront/product-view.ep?pID=B92-118
you usually don't need a defrost in a cooler. otherwise the defrost just shuts the compressor off for x amount of time and let the fans . the only time you really have problems in coolers is when you lose a fan(or multiple fans) or a very dirty evap coil restricting air flow. Then the coils will freeze up
I helped our warehouse tech to install a timer on a freezer, we followed every step and traced all of the wiring! it's not kicking into the defrost mode or turning the compressor and fans off! IDK if the wiring is bad or bad timers!
could be a bad time clock or the defrost pins are missing? the so might not be working to pump down the system, could be a bad low pressure switch, there are many think that could cause that.
If you are adding a pressure switch to the defrost clock for the purpose of termination, then yes. The pressure switch will close, lets say on pressure rise, its switch will close, then energizing the termination solenoid on back of the clock ending defrost, clock reverts back to normally open/closed positions.
I teach at an HVACR program at this would be a great mock up, did you generate a material and source list ? I looked at somem of the Hamden trainers and there wayyyyyyy to expensive, Id b super grateful if you could help us out , Id gladly send you pics and updates as my kids build your trainers ! Thanks !
i have kitchenaid model is YKBRS21KAW00 my problem is .if the temp control is off!! the defrost timer is making noise and advance, evap fan is running but slow and compressor wont start.but freezer will be cold but if the temp control is on!!! the compressor start ok freezer stay cold,but defrost timer is not making that noise and does not move a bit, evap fan won't start at all and inside the fridge part its hot no air coming from the vent in fridge. . the light in fridge and freezer stop working and there is a small switch for uses less energy if flip one side and flip on other side is for reduces exterior moisture the light does not come on either on the switch. not to sure what this switch do but din't seem to make a difference in the pass but i know that light was coming on if it was flip on before . any suggestion of what can be wrong ? I change the defrost timer and i change the evap fan and the temp controler too at the same time !.something is running backward but not sure what could do it ... Show less
Very Nice but I am kind of confused because the terminals are different on this time clock from the time clock that you showed on your two previous videos. On the previous videos you showed L2 connected to N. I reason that this may be a different time clock and it needs to be connected differently. That being so, can the time clock that you showed on your previous video be used in place of the one that you show in this video?Anyways for me you have certainly taken the mystery out of time clocks. The only thing that I would elaborate on would be that when the solenoid closes it causes a pump down and stops the compressor during the defrost.
Gotta love RUclips College, one of the best ways to learn new things, or even just better understand things you already have a basic grasp on (which is my case). Appreciate the video Charles!
Thanks for the video. Good circuit logic setup/explanation. Only thing you did not mention the functionality of is the thermostat on the left hand side of the setup. I assume that is just a refrigerator thermostat controlling when to kick on the compressor to cool the frig. to the proper temperature.
I am running into units with thermisters and electronic timers. I am not for certain if that kind of mechanical timer would work on the higher tech systems.
How do yu set thermostat and timer to work together, If I want my freezer to defrost 4 times per day yet the temperature will rise to cut the compreser through thermostat even more than 4 tyms?
thanks for the video, does the terminal 4 in the defrost cycle switch connected to the compressor back to terminal Xl , or compressor should be connected in series with valve and thermostat?, please clear this, thanks in advance
I would not advise a compressor be wired through the defrost switch. The compressor can pull quite a bit of amps. Although defrost clocks can handle a good amount of amps, I would control the compressor via a contactor. Then let the defrost clock, thermostat, etc control the contactor.
Usually N on the majority is for the L2 leg of power. There are done timers that N is for a different designation. Always double check your wiring diagram. You also visit the MFG. Website for instructions or diagrams. Thank you checking out the video.
i work for a company that mainly does commercial heating and cooling towers your videos explained refrigeration perfectly for me i feel like ive been working for years haha thank you and ill will 100% like and subscribe
Man for me this is the best explanation video on this subject. Thanks for sharing and putting in the time to make that mock setup for all of us to see and learn from.
Very pragmatic with practical eye on what is going on. Though I am a novice I will give you 10 out of 10.
May God bless you for your good intentions.Nice guy.
The handheld diagram is incorrect. You drew the symbol of normally open contacts between terminals 2 and 4 but labeled it NC (normally closed).
This helped me out on a long hard day where i found myself confused and frustrated on a job. Came home to do some learning and this really did the trick.
excellent video Charles. I'm 7 years too late, but it still is a great teaching tool. Thank you for sharing your knowledge. This is so very well displayed. Thank you!
Great video....can you make more video about the refrigeration system...
Why is there a valve in the liquid line ? Why not just turn the compressor off ?
Thanks. You use your valuable time to explain what I found complicated to understand. Now its clear. i admire your work.
This is the best and clearest full explanation that I have seen. Thank you!!
Good video but you labeled the time clock diagram very confusing
great video can you add the wiring for the condesin unit. thankyou!
I’m 3 min into the video so far very informative. Just wanted to tell you the symbol for your limit switch is backwards. Should be above the decimal. They way you have it drawn indicates the switch opens on temperature fall and closes on temperature rises you want it to open on temperature rise and close on temperature fall. Just some constructive criticism. Keep up the great work!
Is this for 115v or for 230v wiring? Thank you for the explanation.
Beautiful. How come you stopped doing this kind videos !!!!
Replaced timer 8145-20. Instructions say should be power to 3 or 4 but not both! I have power to both. What to check
Whats a problem if the Timing motor...turn on to clockwise?
great job !!!!!!!!!!!!!!! that is what i want to built !!!!!!!! thank you for your time and information keep those videos coming
Thank for information I’ve not been sure about the defrost terminate -is the other side of the terminate switch coming from #3 on the clock ?
Really good video very instructive thank you so much and may our God bless you
love your video , I'm a hvac/r tech and sometimes I still get confuse with some stuff and this video clear some of those doubts , thanks.
Charles. Great video!!!! I have a question.
How is the compressor able to accomplish pump down of the system,when I switch from 2-4 refrigeration contact to defrost 1-3 (now closed)? I can't see it how it's done,since evaporator,thermostat and solenoid are all in series on the same circuit,namely 2-4.
By switching from 2-4 contact to 1-3 contact now energized, I de-energize the solenoid,now closing and pump down can't be accomplished by the compressor.
Please help me understand this problem. Thank you
The compressor is not part of this circuit. Only the solenoid that controls flow of refrigerant. Once the solenoid closes the condenser still runs pumping the system down. Eventually the low pressure switch on the condensing unit triggers and opens the circuit shutting down the compressor.
When I go to Sam’s Club, I noticed that sometimes the evaporator fans in the coolers holding the frozen foods are off. I assume that when the fans are off, the evaporators must be in defrost mode as you have described in this video. However, when I look at the evaporators in the refrigerated (non-frozen) foods cooler, those fans are always on (never off). What defrost system do you think the evaporators in the refrigerated foods cooler have which does not require the fans to go off? Or is that the fans do go off in defrost mode, because of the warmer temperature that the refrigerated foods cooler is in, the defrost cycle does not happen as often?
Some air defrost walk in coolers do not have electric heater. Most fans in these coolers are always on.
Here is the walk in cooler which is air defrosted.
www.johnstonesupply.com/storefront/product-view.ep?pID=B92-118
you usually don't need a defrost in a cooler. otherwise the defrost just shuts the compressor off for x amount of time and let the fans . the only time you really have problems in coolers is when you lose a fan(or multiple fans) or a very dirty evap coil restricting air flow. Then the coils will freeze up
Nobody shows voltage checks and that’s what people want to see
wow so much saying not much explaining
Get your meter out and show what the voltage will say.
appliance.academy
Damn man you know how to explain very well!
I helped our warehouse tech to install a timer on a freezer, we followed every step and traced all of the wiring! it's not kicking into the defrost mode or turning the compressor and fans off! IDK if the wiring is bad or bad timers!
could be a bad time clock or the defrost pins are missing? the so might not be working to pump down the system, could be a bad low pressure switch, there are many think that could cause that.
👍
Thank you for sharing.
Thanks for the videos, if a pressure switch is added would it be wired independently of the other controls in the circuit .
If you are adding a pressure switch to the defrost clock for the purpose of termination, then yes. The pressure switch will close, lets say on pressure rise, its switch will close, then energizing the termination solenoid on back of the clock ending defrost, clock reverts back to normally open/closed positions.
I teach at an HVACR program at this would be a great mock up, did you generate a material and source list ? I looked at somem of the Hamden trainers and there wayyyyyyy to expensive, Id b super grateful if you could help us out , Id gladly send you pics and updates as my kids build your trainers ! Thanks !
i have kitchenaid model is YKBRS21KAW00 my problem is .if the temp control is off!! the defrost timer is making noise and advance, evap fan is running but slow and compressor wont start.but freezer will be cold
but if the temp control is on!!! the compressor start ok freezer stay cold,but defrost timer is not making that noise and does not move a bit, evap fan won't start at all and inside the fridge part its hot no air coming from the vent in fridge. .
the light in fridge and freezer stop working and there is a small switch for uses less energy if flip one side and flip on other side is for reduces exterior moisture the light does not come on either on the switch. not to sure what this switch do but din't seem to make a difference in the pass but i know that light was coming on if it was flip on before .
any suggestion of what can be wrong ?
I change the defrost timer and i change the evap fan and the temp controler too at the same time !.something is running backward but not sure what could do it ...
Show less
Very Nice but I am kind of confused because the terminals are different on this time clock from the time clock that you showed on your two previous videos. On the previous videos you showed L2 connected to N. I reason that this may be a different time clock and it needs to be connected differently. That being so, can the time clock that you showed on your previous video be used in place of the one that you show in this video?Anyways for me you have certainly taken the mystery out of time clocks. The only thing that I would elaborate on would be that when the solenoid closes it causes a pump down and stops the compressor during the defrost.
Gotta love RUclips College, one of the best ways to learn new things, or even just better understand things you already have a basic grasp on (which is my case). Appreciate the video Charles!
please clarify defrost timer series. Looks like a 8141-00
Honestly not sure. This trainer now has a Electronic Defrost control. It was probably the 8141-00 though. If I find it I will confirm. Thanks.
switch you're n and x terminal marking also n terminal has no swtch
This is great, I have watched this so many times. great education when you dont do this everyday. Thank you 7 years later lol
Hey that dftd switch is it a momentary switch or regular and will stay on unless u turn it off if so what is the part number?
I Ilike your vídeos but i would Ilike to explain them as well in spanish greetings teacher
great's
Thanks for the video. Good circuit logic setup/explanation. Only thing you did not mention the functionality of is the thermostat on the left hand side of the setup. I assume that is just a refrigerator thermostat controlling when to kick on the compressor to cool the frig. to the proper temperature.
great explanation. there are so many factors involved on a commercial walk in freezer.
Top of the line for the extra effort, what could Prevent the voltage from not switching? Time clock ok..
Great Video, I will appreciate if you can give details like which wire goes where from timer,.
Can you upload a video where you wire the pressure switch to the contractor and the compressor please .
I am running into units with thermisters and electronic timers. I am not for certain if that kind of mechanical timer would work on the higher tech systems.
How do yu set thermostat and timer to work together, If I want my freezer to defrost 4 times per day yet the temperature will rise to cut the compreser through thermostat even more than 4 tyms?
great video thank you
Very good tutorial brother god bless you looking forward to see more videos
why some defrost clock are feed the power with leg 1 and N? please
VERY GOOD VIDEO !!!!!!!!!!! THANKS FOR THIS !!!!!!!!!!!!!!!!!
Great video !!! Thanks so much
Awesome I don’t have words to say god bless you man
Very good video. Thank you.
Normally closed solenoid for Liquid line!
Limit switch close on temperature rise!
Another excellent demonstration.
Thanks for sharing.
Great stuff. In the near future can you do the same for digital clocks. Example groslin dtav40
I'll try.
Thank you for taking the time
Well done - thanks.
It doesn’t get better than this
thanks for the video, does the terminal 4 in the defrost cycle switch connected to the compressor back to terminal Xl , or compressor should be connected in series with valve and thermostat?, please clear this, thanks in advance
I would not advise a compressor be wired through the defrost switch. The compressor can pull quite a bit of amps. Although defrost clocks can handle a good amount of amps, I would control the compressor via a contactor. Then let the defrost clock, thermostat, etc control the contactor.
excellent
Very very good video
Thanks for sharing ,,
Very good👍
Very nice......
nice video thank you.
Goog sar
one of the best explanation thanks
Very nice
Manda el diagrama en una imagen
beautiful man....its beautiful.....
Thanks sir 👍
Amazing
Thought N was neutral
Thought 4 was the control circuit
Usually N on the majority is for the L2 leg of power. There are done timers that N is for a different designation. Always double check your wiring diagram. You also visit the MFG. Website for instructions or diagrams. Thank you checking out the video.
Respect!
i work for a company that mainly does commercial heating and cooling towers your videos explained refrigeration perfectly for me i feel like ive been working for years haha thank you and ill will 100% like and subscribe
Man for me this is the best explanation video on this subject. Thanks for sharing and putting in the time to make that mock setup for all of us to see and learn from.
horrible exponations
Nice