HVAC: How To Wire High And Low Pressure Switch For A AC (How To Install High/Low Pressure Controls)

HVAC: How To Wire High And Low Pressure Switch For A AC (How To Install High/Low Pressure Controls) High And Low Pressure Switch Wiring Diagram / HVAC Low Pressure Switch / HVAC High Pressure Switch
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In a air conditioning/refrigeration system the high-pressure cut-off switch is a control device which is used as safety control. The compressor is stopped by cutting the power supply of the motor of the compressor whenever the discharge pressure of the compressor becomes excessive. This is necessary to prevent the possible damage of equipment.
When the pressure in discharge line raise above a certain limit of pressure, high-pressure control device operates and stops the compressor by cutting the power supply given to the motor input.
Low-pressure controls can protect compressors from too low of a pressure situation in case of a coil freeze-up or lost refrigerant charge. Low-pressure controls can also protect some water chillers from freeze-ups.

[@bigDrob]

Great explanation, but for more practical purposes should you wire it next to the contactor from the coil side, through the switches since in reality we wont be running those wire indoor at the thermostat?

[@realSamAndrew]

I know this is nitpicky, but your LPC and HPC drawings are labeled opposite of what the symbols mean.

[@lyndonlakhansingh]

Can you send a link with a clarification plz

[@realSamAndrew]

@@lyndonlakhansingh after further review of other documents, I have seen it done both ways. So, either orientation could be correct. It depends on who is writing the schematic. Some use the left pole and some use the right pole as the one that opens. In this video, he is opening the right side pole on pressure change. As long as that is specified, the video is correct.

[@miguelrojas3394]

Thank so much jumper man for sharing knowledge this is a perfect explanation how the pressure switches works ,blessings. 🙏🙏🙏

[@robertdavenport9095]

Great explanation I really appreciate you wiring it first then explaining. I find that is the easiest way to understand wiring diagrams. Thank you once again.

[@Hodge215]

Could you do a video on Ptac units and cooling towers? Thanks! Keep up the great videos.

[@barringtonwilson6438]

I really like the way you explain, u make it easy

[@benahmedahmed831]

Perblam E2 model SERVICE FIRST Trance Rooftop SENO termosta SENO 1577 et Bp=1bar open

[@skaterwig]

So when troubleshooting to rule out that one of these is open you would test continuity on each switch to common, right?

[@ponkograndie]

Great video, awesome explanation! But one nitpick as a controls tech myself, you should be leaving the Y on the terminal block, putting your first blue lead on the other side of your terminal block and then last red lead to the timer, for less wire nuts and less confusion! All aside I love your videos keep em up man!

[@maybe_its_maybelline6381]

I think he would’ve had to move timer lead if he did it that way

[@jhomarylandicho7018]

Sir how about with high and low pressure switch, ah3 timer 8pin, .magnetic contactor.with tor, do i need to add lock out relay? please create a wiring diagram, 3 phase Compressor of AHU thanks ❤️

[@ScreenPrintR]

Do you have these videos for UA-cam or do you have a training school/course certificate program?

[@kimsonmao8465]

Great video. Would you please make the video how to wire dual pressure control switch on refrigeration. like a mechanical one that control temperature on reach in freezer. Thanks

[@theholyquran755]

Thank you so much. Can you help with a standard wiring diagram for a walk in cold room , Thank you in advance

[@viper22304]

Thanks for sharing. Question: (Without the Timer) Can I connect the yellow wire going to the contactor, in series with the pressure switches, and connected the other end to the contactor?

[@rolandodelapaz3970]

Very nice tutorial about pressure switch Very interesting video thanks a lots more power and God bless you sir.

[@shine-cg9uf]

👍💪🇺🇸❄️ Great info n diagram thanks

[@DannyFiguroa]

Sir, thank you

[@Eddy63]

Excellent little vid as usual ... Nice explanation ... Thx and much appreciated ...

[@RCH-yf2mw]

Very interesting and fun to watch. Thank you for the nice work!

[@samuelaranda4597]

Use a condenser fan relay. Because on larger systems that what they use. So when a Teck comes up on a system and only sees the fan’s on then they know the system is calling . This is important because you can do a lot of trouble shooting when you walk up to a unit and seeing what’s it doing.

[@kennethlobo4420]

Great video, Thank U for the explanation. God Bless.

[@1982uno]

I like the you explain stuff , you make it so easy to understand.

[@malcolmperry7765]

You explained very well

[@JDT738126]

Nice wall man, looks great

[@kennydieu2694]

Great tutorial video and thanks for sharing . 👍

[@marcosmaldonado952]

Thanks a lot God bless you 🙏.

[@muhammadnaeem4834]

cold room full diagram

[@thundersquigg3009]

Thank you for this man Fr

[@stephwaylonwells3218]

👍

[@thesilentonevictor]

Great informative video

[@janakarangovindasamy6230]

Thankyou

[@mahmoodalam4122]

Good explain