Beginner HVAC wiring and schematics for electric heat strips. Learn heat strip wiring and schematic reading necessary for beginners to develop solid diagnostic skills. / jerseymikehvac
Watched a ton of videos. You sir explained this perfectly. Didn't make this complicated and easy to follow. It has been said - if someone can't explain in simple terms they lack the understanding of the subject. Brilliant video!! Thanks
I loved your video. Thanks for taking the time to do this. Just by chance this is the same model I have. The diagram on the air handler was not readable. Fixed my a/c with your video. Thank you.
just bought a home in windam ny it has a oil fired furnace with an emergency heat strip system sooo interesting and you explained it all you know your shit love it
Thanks Mike. Also there is Interlock schematic for heat strip whenever called for heat fan come on , which is that whole another topic. But anyway appreciate the illustration
Jersey, Thanks for the video. very well explained. I will use it to see if I can see the circuit and diagnose why the 50amp breaker on the Air Handler Unit is tripping off after 2 to 3 minutes of operation in the "HEAT MODE" on my Goodman 2.5 ton air handler ASPT35B14AB WITH A "HKS*08CXC HEAT STRIP KIT- I replaced the air filter with a new one for better air flow but stills tripping the breaker after 2 minutes operating in HEAT MODE ONLY. The AC Cooling mode is working fine and cools fine, but not on the HEAT MODE as the blower motors stops because both, circuit on the heater and air handler unit operates on the 50 amp breaker, and the Outside Compressor Condensing Unit operates on a separate 30AMP Breaker circuit. Perhaps the Thermal Limit switch is faulty or the heater links are drawing too much amps and overheating or the blower motor? Can you give me some advise
Greetings Jersey. Awesome video. Perhaps the best stationary hvac videos on YT for educational training. I'm repairing my handler unit as its heater strip was entirely missing! It seems to have been incorrectly wired for single stage when the heater was bypassed, but I need a 2 stage. Can a second run of romex from my main 60a breakers specifically go to the heater L1, L2 and use the same source from the handler for the other two L1 & L2 breakers?
mike, I have a 30+ Y/O Coleman 3500 series furnace (15 KW, 3 elements) is it recommended to have the 3rd element on the W2 lead or just leave it in the original setup. I'm thinking efficiancy to help cut the costs in winter, if that does anything... does W1 and W2 on the thermostat work at the same time, or is there a temperature variable? I am using a NEST thermostat on my system.
I did explain it in the video, but basically that purple wires serves no purpose in a properly functioning system. The only time it does something is when the relay that turns the heat strips on and off gets stuck on (sometime an arc flash welds it into the on position), and the heaters won't shut off when the system tries to shut down when the thermostat is satisfied. That purple wire connects to that heater relay, so if it still has power on it when the switch should be open and the heaters off, that purple wire will feed voltage to the relay on the fan control board, which will go straight to the blower motor and force it to run even though the system and thermostat aren;t calling for it to run. It's like a safety wire to keep the blower running if the heaters wont shut off.
So if I have a double coil heat element do I need 2 thermo switches? Because mine has a place for 2 but only has one. An mine don't have the little meltable fuse at all it does have like a 3 amp chip fuse like the kind in a car. What could happen if the thermo limit switch isn't hooked up?
Are they wired in as separate stages or in series as a single stage? The one thermal limit can cut out both heaters in series, but if they're staged I'd want to add another thermal limit. The fusible links act as a backup to the thermal limits., so it's double protection in the event the thermal limit fails to operate when it should. I'd feel more comfortable having them if you have only one thermal limit in there.
@@JerseyMikeHVAC the chip fuse runs off the transformer. But the thermo resistor wasn't never even hooked up it was by pass. That's what scares me an I been using the heat for about 5 years like that. But a double heat element can run off one thermo resistor? If it made to handle 2 an in series?
I have 2 coils heating element and both of them heats partially, you can see them only light one alf of the string, that means it's a bad heating element?
@@JerseyMikeHVAC I only have the inside unit at this time for heat. white wire goes to w1 and brown goes to w2 for heat but this thermostat doesn’t have w2 for second strips.. well at the unit i put those two together and now i have 130deg heat instead of 98 deg thanks for the reply
Are you asking if you can use one breaker and power line for the heat strip and the air handler so you don't have to run an additional power line on a separate breaker? If so, my advice would be to put in a small sub panel by the air handler off of the existing electrical line (assuming it's sized for a 15k heater) and then split it with separate breakers from there. You can also call the manufacturer of the air handler and see if they offer a breaker kit for retro fitting heat strips that will serve your purpose. Most do.
@@JerseyMikeHVAC Mike, I have the breaker kit, I just wanted to know if it is possible to use 1 breaker out of the 2 on a 15 or 20kw heat strip just like I would use a 10kw with 1 breaker since there are 2 heat strips on both the 15 and 20kw heat strip. I have a 10kw, a 15kw and a 20 kw for a Goodman 4 ton variable speed air handler and an inverter variable speed heat pump.
Mike, if I wire just 1 and not jump to the other, would that work and not affect anything? You are the best in the business and know your stuff. I enjoyed watching all of your youtube videos. You do a fantastic job. 👍👍👍
@@JerseyMikeHVAC Tell me if this works? Use the existing 60 amp circuit and wire to power only the heater coils and a separate 20 amp 220v circuit #12 awg wire to run the air handler.
That's a lot closer to workable. What's the model number of the air handler? From that I can tell you if you'll need 20 amp 12 wire or 30amp 10 for proper sizing.
I don’t know what part of the world you live in, but the US that is the United States is and has been since the late sixties on 240 volts. To my knowledge and I may be mistaken, has never been on 115/230 volts. We that is the US switched from 110/220 to 120/240 volts.
