Will fused disconnect protect my heat pump full

Will fused disconnect protect my heat pump full

Forgot your Password? We welcome your comments and suggestions. All information is provided "AS IS. All rights reserved.

will fused disconnect protect my heat pump full

You may freely link to this site, and use it for non-commercial use subject to our terms of use. View our Privacy Policy here.

Toggle navigation subscribe. Log in. Remember Me? Login with Facebook Log in. Forgot Password? New Posts. Today's Posts. Community Member List. Forum Actions Mark Forums Read.

Quick Links View Forum Leaders. Heat pump disconnect. Thread Tools. Quick question: Do I use a Non-Fusible or fusible disconnect outside next to my heat pump? Or does it matter. Thanks, Dano. View Public Profile. Find all posts by Dano Received 87 Votes on 74 Posts. Unless your instructions for the unit call for fuse protection you can use a non-fused pullout disconnect.

Find all posts by pcboss. Received 86 Votes on 76 Posts. There is a definite application for a fused disconnect, but it doesn't occur that often in residential work. Assuming you have a 50 amp circuit, if you have reently replaced your old unit with a new higher efficiency unit, the manufacturer may call for a MOCP of 35 amps or 45 amps. In these cases, you would use the fusible disconnect and fuse it to match the MOCP rating.Log In. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.

The Eng-Tips staff will check this out and take appropriate action. Click Here to join Eng-Tips and talk with other members! Already a Member? Join your peers on the Internet's largest technical engineering professional community. It's easy to join and it's free. Register now while it's still free! Already a member? Close this window and log in. Are you an Engineering professional? Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here. Related Projects. I seem to get mixed answers on this, but when do I use a fused disconnect instead of a non fused disconnect at a unit. My understanding is a fused disconnect can act as secondary protection to the overloads.

Subscribe to RSS

I have read that on HVAC units you want to use a fused disconnect. So how would I determine what size needs one and which does not. If the circuit is protected upstream by a circuit breaker or another fuse, then the general rules of the NEC would not require another fuse at a local disconnect.

For these systems, a current-limiting is required at some point in the circuit. So if the upstream device is a circuit breaker, the local disconnect will need to be fused in order to have an installation that meets UL requirements and hence, NEC requirements.

Also, a non-fused disconnect switch will generally have a lower short circuit withstand rating than a fused switch, so for systems with a high level of available fault current, the fused disconnect may be a practical necessity. Yes the feeder of this circuit will have a circuit breaker.

So for example a 50hp exhaust fan would not need a fused disconnect, just a standard disconnect? Probably not, but you need to look at the recommended installation information from the fan manufacturer. In most cases, a simple fan would not require a fuse, but if there were other things power from the same V circuit on the fan assembly e. For HVAC equipment this is most often an issue for package system such as heat pumps, chillers, air handlers, etc where a single power supply is run to the skid and there are starters, motor controls, breakers, etc provided with the HVAC system.Remember Me?

Page 1 of 3 1 2 3 Last Jump to page: Results 1 to 20 of Thread: Are fuses in disconnect necessary?? Thread Tools Show Printable Version.

Are fuses in disconnect necessary?? I've seen more often than not service disconnects without any fuses at all, simply a part that is pulled out.

Bayo chip

Of course down the line are circuit breakers. But why then do some have fuses and some not? What is the advantage of slow-blow fuses? Do they protect the condensing unit in someway better than just a circuit breaker? Depends on local code, and whether or not the breakers back at the panel are HACR rated. Slow-blow fuses allow for inrush current on startup. Join Date Nov Location N.

An electrician told me it would help protect the equipment better, quicker? Not sure of the reasoning, all I know is if you put in a fused disconnect, it's a guaranteed service call at some point! The manufacturer determines if fuses are needed. The word "fuse" or "fuses" will be mentioned, right on the equipment label, using a phrase like "minimum fuse size.

Including fuses. So, if fuses are mentioned, the NEC requires fuses. They do NOT have to be in the equipment disconnect. They can be the branch service fuses, in an old style fuse panel, or the fuses can be in a sub-panel near the main panel, OR, they can be in the equipment disconnect. BUT, if they are mentioned, they have to be somewhere. With most modern buildings using circuit breakers in the service panel, when fuses are mentioned on the equipment label, they are usually in the equipment disconnect.

Everyone walked away.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. I'm having trouble determining a few things about the circuit. The outdoor unit and indoor unit both have an electrical specification sticker. My confusion comes from the fact that the indoor unit plugs directly into the outdoor unit and only the outdoor unit receives power from the house.

Some of my reading makes me think that since the sticker explicitly says Max Fuse that I must use a fuse instead of a breaker. I read through the installation manual, which was surprisingly bereft of meaningful electrical information.

Regardless, the MCA is the required Minimum Circuit Ampacitymeaning your circuit needs to be sized appropriately for at least that amperage. HACR is likely to be listed on your breaker, but it's no longer required. You can do what others have suggested and use a larger ampacity circuit with an appropriately fused disconnect at the unit, but your circuit would be needlessly oversized.

To directly address your questions, the labels indicate electrical specifications for the unit, and if the instructions only show the indoor unit directly connected to the outdoor unit, then the outdoor unit should provide for any protection the indoor unit requires. The circuit only needs to supply enough current for the unit and not allow more current than the maximum rating.

Old 16mm kodak pageant film projectors

Here is a pic. Note screw fuses. The indoor unit is indeed fed from the outdoor unit.

Gil eannes

Fuses are definitely superior protection to breakers. The unit package should include a wiring cord that communicates between the units and provides power. The name plate sticker on the indoor unit is there for other reasons.

It is not there to tell you how to provide power to it. Use a 30A breaker to feed a fused disconnect with fuses as your manual said 25A fuseslocated next to the outdoor unit. Sign up to join this community.

Flutter get file type

The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.

Msi afterburner not working on destiny 2

Sizing circuit for mini split heat pump Ask Question. Asked 2 years, 6 months ago. Active 9 months ago. Viewed 29k times. First question; Does the sticker on the outdoor unit take this into account? Second question; Is this true? Remember that the circuit breaker in your home panel is present to protect the wiring to the unit, not the unit itself.Remember Me?

Results 1 to 8 of 8. Thread: disconnect size for 2 ton heat pump. Thread Tools Show Printable Version. I am having a 2 ton heat pump installed which requires a maxium breaker size of 20 amps.

will fused disconnect protect my heat pump full

I am assumming that the disconnect needs to match the maximum breaker size but I can't find a 20 amp fused disconnect. Is there a problem using a 30 amp fused disconnect? Does the disconnect provide any overcurrent protection or is it's only purpose is to provide a local means to disconnect the power? There are disconnects made for the AC industry.

How to install an A. C. Disconnect

It doesn't really make sense to fuse twice. Once in the panel and once outside. Ths disconnect is there to protect the servicer and can be locked out and it is maximum current rated. Can you buy a 30 amp fused disconnect and put 20 amp fuses in it? That is what I would do. A non-fused disconnect would only provide a means to disconnect and no overcurrent protection, but you must have fuses or breakers somewere else in line, at the breaker panel, etc. Those are the MAX ratings. You can put fuses in it for any rating at or below it's max.

So, you would use a 30 amp disconnect with 20 amp fuses, and that will work fine. I'm the guy with the gun. Statements made by me are strictly my opinions and do not reflect the opinions of my employer. I am not authorized to make any official statements on behalf of my employer. Any technical advice offered by me is for educational purposes only, all HVAC related repairs should only be attempted by qualified personnel.

A disconnect is a disconnect, used to turn off power while being serviced and does not need to be fused. Join Date Jul Location N. Some local codes require a fused disconnect,its the fuse size that matters, so if you must put in the 30 amp with 20 amp fuses. Thank you everybody. I didn't understand my options before but now I do. You have answered my questions. Join Date Mar Location burlington county n.

Please read this Valves, Regulators, Filters, Etc. All times are GMT However when entered on mobile it will not open the window to review only the business search on Google. I would have lost faith in it due to endless Google updates but your link still works excellent. Your help is greatly appreciated.

Was pretty pumped to see this article.

Heat pump disconnect

Tried it right away, got my link. It works on desktop but not on the mobile. Is anyone else having this problem. In Chrome it works just fine. I have tested on Chrome, Firefox, and Internet Explorer. Your link works on all. Let me know how this works out for you. Make sure you setup your business with the right type of page. I am not familiar with Czech Republic Google My Business pages.

I am currently working in Firefox so perhaps that is an issue. Any help would be awesome as we want to set this up as a clickable link in the newsletters that we send out. Once you create this link, can you then text it to a bunch of people and have it work every time.

Im trying it and it seems to only work once from each send. I sent it to multiple people (multiple different locations, and each only redirected correctly once. I would suggest that you scroll down further in the post and continue the process. It appears you stopped at step 1. That said, I am not familiar with French Google My Business pages. This method works great. I just double-checked to make sure.

Are you in the United States. I am not familiar with non-US Google My Business pages.Bwin is big time sports, real action and more. We do not just talk about fun and excitement, we actually make it happen. We are not a bookmaker, we are a commercial website that sells betting advice, known as "picks" or "tips". It is for making investments and, hopefully, profits.

Minimal hulls and minimally convex domains

We are here for the sole purpose to assist you in choosing games for betting. This ticket have fixed matches (total odd: Under 40).

will fused disconnect protect my heat pump full

The price for the ticket is only 20 euros payment metods is: Western Union, Skrill, PayPal, Moneygram. Polten Tip: 1 Odd:1. Gallen Tip: 1 Odd:1.

Sucre - Nacional Potosi Tip: Under 3. Madrid Tip: 1 Odd:2. Ironi Rishon - M. Herzliya Tip: 1 Odd:1. Beer Sheva - Shmona Tip: 1 Odd:1. Lustenau - Ried Tip: 2 Odd:1. Liege Tip: 1 Odd:1. Craiova Tip: 2 Odd:1. Eagles - Jong Utrecht Tip: 1 Odd:1.

Eagles Tip: 1 Odd:1. De Chile - S. Wanderers 1 1:3 1. Sucre - Sport Boys 1 2:0 1. Truiden - Eupen 1 4:4 1. Our suggestions and prediction are based on good sources and informations from first hand.

All bets are on your own risk. Betting-Expert You are visitor no. Free website powered by Beep. Sucre - Sport Boys12:01. Read more This company has claimed its Trustpilot profile, but to our knowledge, doesn't actively invite its customers to write reviews on Trustpilot.

Read more This company hasn't claimed its Trustpilot profile and to our knowledge, doesn't actively invite its customers to write reviews on Trustpilot. Read more Back Rate bettingexpert. I am very satisfied with their services, they helped me several times, my all recommendations. There is also great admins, they will help you always to solve your problems if you have it and if you have some questions they will answer the fastest as they can.

I want to thank admin Dejan and David for everything they did for me, very kind and helpful admins. This site offers the ability to learn from the best and compete with them. Here you really learn the real skills for betting and this pushes people in the right direction. Instead of wasting money like that you learn a betting skill and the level of tipsters here is pretty high. I recommend it to anyone with betting interests.