Heat Pumps - Preparing for Heating Season Part 1
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- Опубликовано: 15 ноя 2023
- In this HVAC training video, Bryan Orr covers key topics in Preparing for Heating Season Part with a focus on heat pumps. He starts by discussing the common "burning smell" complaint when electric heat first turns on and stresses the importance of testing and burning off heat strips during maintenance.
Bryan explains proper wire sizing, breakers, and connections for electric heat. He also covers blower interlock relay wiring to prevent heat from coming on without the blower. Additional topics include:
Testing heat pump defrost
Testing heat strips with an amp clamp
Energy cost of heat strips
Heat strip wire and breaker sizing (including
Inspecting heat strips by pulling blower or strips)
Undersizing issues
Heat sequencers
Heating season PM best practices
The video provides a practical overview to ensure technicians are equipped with the basic knowledge needed for heat pumps and electric heat as we head into the heating season. Bryan stresses the importance of testing to avoid costly mistakes and emphasizes using resources like system checklists when in doubt.
Video about wire sizing: hvacrschool.com/videos/how-ma...
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Nice class maintained my interest Thank you
Love how you teach.
Love your classes Mr Brian!! Made My transition of careers alot less stressfull.
Excellent information video
Excellent video
Great as usual.
Great video!
Appreciate the content! Keep up the good work!
Yo Brain Orr got that 50 cent drip on today.
Many men wish high head pressure upon me
refrigerant oil in my eye, dawg, and I can’t see
I’m tryin’ to be what I’m destined to be
And higher governing body’s tryin’ to take my license away (C’mon)
😂😂😂😂
As always, excellent. Thank you. raphael nyc
Excellent video thanks. I learn a lot from your great channel. But for this video, I do feel the focus was more on heat strips rather than heat pumps as suggested by title and description.
1:36
Nice information videos
Found some of your vids very good to absorb recently even if you were speaking very quick for my low speed brain drive.
I am here to learn
I actually have replaced a Heat Strip because the amp draw was wrong. Was reading
I think an easier way of thinking about using the 90340 would be to just put the blower speed tap on 1. Normally open would be power in and normally closed would be your strips.
Exactly
Always have A clamps when checking heat strips.!
Bring strips on at stat. That way you know if the customer needs strip heat, the thermostat is actually working to bring them on.
60°C,75°C,90°C is the wire temp classes. Heat strips are resistive and not like an induction motor. In commercial we use SCR's ( Triac ) for our heat strips in Fan powered boxes. You can vary the voltage ( phase angle ) and thus have modulating heat output. Use Polaris connectors instead of wire nuts
Don't forget to tell them what SCRs are and what they do.
@@LevizGibson since they deal with AC....it would probably be better to tell them what a Traic is. Even though we may already know the difference.
Need your expertise!! How do I test my total ESP of my furnace (up flow) when I have return air duct entering both sides of the furnace ? Where to put the static pressure probes ? Thanks in advance !!
I believe he has couple videos on this.
Gonna start heat pumps next week in school.
I have watched the blower interlock with the upside down relay 20x now and I’m still lost,somebody help
This applies to PSC blower motors-with a G call (blower on) the 24v coil inside the relay will be energized which will close the normally open contacts to send power to let’s say medium speed on the blower motor with a typical “fan on” call.
Using a relay with at least 6 pins (we use 92380) there will generally be a set of normally closed contacts (opens when 24v coil is energized) that we can utilize so that the blower motor will always come on when the heat strips are energized even without a G call. The way to do this is to have another speed wire (let’s say high speed) connected to one side. The other side needs to be connected to the load side of the relay for the heat strips so that when the heat strips are energized this power is also sent to the high speed tap of the blower motor.
It’s important to verify which line of power is being used though, if your speed wires for your blower motor is fed by L2, you’ll need to make sure that the power you’re utilizing from the heat strips is also L2 not L1.
Sorry if this explanation is confusing, it would be easier to explain with a visual but the basic goal is to be sure your blower motor comes on any time the heat strips come on but not the other way around.
That is called a set back, not offset.
DANGER check yourself if you use after market parts and not OEM Parts and something goes wrong. You now took that product off the UL listing. YOU CAN GET SUED. ALWAYS use oem parts for perm fix.
Give me one example where using aftermarket parts designed for the purpose where someone lost a suit
@HVACS look up New Jersey furnace fire. Company was sued. Insurance found after market limit. Missing the the point. Products get listed on UL as is. If you change anything that is not oem. It is no longer listed under that UL listing. And if you the last one to touch and something happens. Who is responsible. I am a 35 plus year experienced tech. Seen it all. Done it all. Worked all over the country. Also was a USAF Civil Engineer
@HVACS you are a great educator. Good info. Just passing on some of my knowledge
No one cares about the worms that are in your brain Mr.Furious
@@furiousfill4593English, here in America we speak english.