Air conditioning disconnect

Air conditioning disconnect DEFAULT

Air Conditioning Disconnects

Air Conditioning Disconnects

An Air Conditioning (AC) Disconnect provides an installer or repair personnel with a visible disconnecting means while performing maintenance on an air conditioning unit. Eaton offers the industry’s most complete line of AC Disconnects. Devices are available in fused, non-fused, molded case switch or three phase designs, and in metal or plastic enclosures for all applications.

  • Non-fused pullout and molded case switch devices provide a visible on-off disconnecting means.
  • Easy-to-remove high strength protective shield makes wiring and mounting easier.
  • Easy-to-remove front cover (no screws or fasteners to remove) allows easy access.
  • Padlockable door provision increases safety and reduces tampering.
  • Easy installation with multiple mounting options and oversized enclosure allows for ample wiring space.
  • Optional Ground Fault or Weather-resistant/Tamper-resistant receptacles are available.

 

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  • 3 Standard Designs:
    • Non-Fused
    • Fused
    • Molded Case Switch
  • Enclosure NEMA 3R (outdoor)
    • Metallic (galvanized/painted)
    • Non-metallic (plastic)
  • Ratings
    • Single-phase, two-wire, 240Vac
    • Three-phase, three-wire, 240Vac
    • 30 and 60 amps
  • Optional Ground fault or Weather-resistant/Tamper-resistant receptacles are available
Sours: http://www.eatoncorp.com.au/Eaton/ProductsServices/Electrical/ProductsandServices/Residential/AirConditioningDisconnects/index.htm?ssSourceSiteId=Oceania

Metering

Disconnects

Milbank’s air conditioner disconnect has a removable hinged cover that makes wiring a breeze. Our compact design meets NEC wiring space requirements and also complies with NEC section 440.14. For safe working conditions, our disconnect pullers may be removed and reinstalled in the OFF position. Additionally, padlock provisions are included on the front cover. As with other Milbank products, our enclosure is constructed of G90 galvanized steel and electrostatically finished with an attractive, light gray, baked powder coating. Our epoxy/polyester resin blend offers a finish that is both durable and fade resistant.

Air Conditioner Disconnect | 30-60 Amps

                                                                                                                                                                                                                                               

U3802                                    U3812

U3832

  • UL listed as Enclosed Pullout Switch 
  • NEMA 3R 
  • Weather resistant 
  • 1-inch concentric knockouts
Popular 30-60 Amps A/C disconnect product numbers 

Air Conditioner Disconnect with 20 Amps GFCI Receptacle

U3862                      U3822-20GWR

  • Meets NEC #406.8 requirement
  • Meets NEC #210.63 requirements  
  • UL listed as Power Outlet  
  • NEMA 3R  
  • In-use cover
  • Duplex ground connector  
  • 1-inch concentric knockouts  
  • 1Ø, 240 VAC  
  • 60 Amps, non-fused 
  • 20 Amps GFCI receptacle 
  • Reset/test button  
  • Weather resistant 
Popular 20 Amps A/C disconnect product numbers 
Sours: https://milbankworks.com/products/metering/disconnects
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Photograph of the outdoor safety switch for an air conditioning residential systemA/C or Heat Pump Compressor / Condenser Disconnect Switch
Electrical Code & Distances

  • POST a QUESTION or COMMENT about how to find, identify, & use or troubleshoot each control or switch found on air conditioners or heat pumps.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.


A/C or Heat Pump Compressor/Condenser Unit Safety Disconnect Switch:

What is the proper location & permitted distance for a safety electrical disconnect switch at or near the outdoor compressor/condenser unit of HVAC systems? What is the requirement for placement, distance, and readily accessible nature of the disconnect or motor controller for equipment operated by an electric motor. U.S. NEC code citations, excerpts, discussion.

This article series explains where to find and how to use the switches and controls for air conditioning and heat pump systems. We list and explain the function of each air conditioner or heat pump control or switch, including providing identification photographs and troubleshooting tips.

We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

List of Outside A/C or Heat Pump Service Switches, Fuses, Circuit Breakers

Photograph of the outdoor safety switch for an air conditioning residential system, shown here with the cover open

The pair of photographs at page top and just above show the outdoor air conditioner or heat pump compressor/condenser service control switch, in this case a circuit breaker, installed outside at a compressor for a ductless cooling system compressor.

More photographs of a ductless or split system air conditioning system are at A/C TYPES, ENERGY SOURCES.

[Click to enlarge any image]

Below you will see an air conditioning system compressor/condenser service switch for an outdoor compressor/condenser outdoor unit that was remarkably unsafe.

The photo (below) shows that there was a 240V fused circuit with outdoor fuses in the box, but this close up photograph [Image file] shows that someone has installed 1/2" copper pipes in place of the original fuses.

This might be a dangerous installation, risking fire as well as a burn up of the air conditioning equipment.

But as Mark Cramer [contact reference] pointed out, if the circuit were properly protected by breakers or fuses at the main panel, the insertion of metal pipes in these fuse sockets just converts the device from a fuse box to a simple switch. An on-off switch is all that is required for this location and application by electrical codes.

Circuit breaker(s) at the electrical panel protect the circuit supplying power to the air conditioning system. Typically separate circuit breakers (or fuses) power the compressor/condenser unit and the indoor air handler/blower assembly.

In any case, simply installing fuses would restore the proper safety device but it's likely that further testing and diagnosis of the electrical circuit and the compressor/condenser unit will be needed to determine why someone installed copper pipes where fuses belonged in the first place.

Photograph of the outdoor safety switch for an air conditioning residential system

When someone converts fuses to a switch in this location it may be because the air conditioning system was frequently blowing the fuses -- someone wanted to force the compressor/condenser to run.

Compressor Service Switch or Disconnect Location & Distance

Air conditioner compressor (C) Daniel FriedmanThe air conditioning system compressor service switch is located outdoors, at the compressor/condenser unit, typically on a building wall near the outdoor unit, this switch may be a circuit breaker, a fuse block pull-out, or a simple electrical switch.

Service switches permit a service technician to work safely on the equipment by turning off electrical power to the unit without having to run back and forth through the building to the main electrical panel.

Where the compressor/condenser service switch is omitted some technicians are tempted to work on equipment while it is electrically "live", and a few of them get shocked.

These switches are required by current electrical codes but may be absent on old A/C installations.

If no service switch is installed at the compressor/condenser you should have one installed at the next A/C service call or next electrical work done on the building.

In our photograph the A/C service switch is very unsafe for two reasons: first, because it is falling off of the wall it may be difficult to operate the switch. Second, ask yourself, "What happened to the screws that were used to fasten this switch to the building wall?"

We've seen cases of the mounting screws falling into the switch box, causing a short circuit or even a fire. In this particular case the vinyl siding installers pulled the switch loose to install siding and didn't bother to reinstall it.

Air Conditioner / Heat Pump Compressor Condenser Switch Maximum Distance to the Compressor/Condenser Unit Disconnect

Photograph of an air conditioning compressor/condenser service switch that is unsafeThe following details are excerpted from the 2011 edition of the US National Electrical Code / NEC.

NEC 430.102(A) and (B) apply to electric motors driving other equipment such as a non-hermitcally-sealed compressor motor found on some commercial equipment or such as a fan coil unit. I [DF] have encountered these installations at both walk-in coolers and some commecial freezers. NEC 430 includes definitions of readily accessible and of within sight.

NEC 440.13 and NEC 440.14 rules for motor disconnect means apply to typical outdoor HVAC compressor/condenser units while

The two sets of disconnect distance rules are similar.

NEC 440.13 disconnect for room air conditioners or heat pumps - paraphrasing: the air conditioner or heat pump unit disconnect must be within sight from and readily accessible from the unit.

440.13 Cord-Connected Equipment. For cord-connected equipment such as room air conditioners, household refrigerators and freezers, drinking water coolers, and beverage dispensers, a separable connector or an attachment plug and receptacle shall be permitted to serve as the disconnecting means.

Informational Note: For room air conditioners, see 440.63.  

For a room air conditioner such as a window-unit, an electrical cord plug that can be simply un-plugged from the electrical receptacle counts as an acceptable disconnect provided the cord is shorter than 6 ft. on a 220VAC unit or less than 10 ft. for a 120VAC unit.

NEC 440.14 disconnect for central or split system air conditioners or heat pumps - paraphrasing: The air conditioner or heat pump compressor/condenser outside service switch or service disconnect must be readily accessible & within sight of the compressor/condenser unit

440.14 Location. Disconnecting means shall be located within sight from and readily accessible from the air- conditioning or refrigerating equipment. The disconnect- ing means shall be permitted to be installed on or within the air-conditioning or refrigerating equipment.

The disconnecting means shall not be located on panels that are designed to allow access to the air-conditioning or refrigeration equipment or to obscure the equipment name- plate(s).

Exception No. 1: Where the disconnecting means provided in accordance with 430.102(A) is capable of being locked in the open position, and the refrigerating or air-conditioning equipment is essential to an industrial process in a facility with written safety procedures, and where the conditions of maintenance and supervision ensure that only qualified persons service the equipment, a disconnecting means within sight from the equipment shall not be required.

The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker and shall remain in place with or without the lock installed.

Exception No. 2: Where an attachment plug and recep- tacle serve as the disconnecting means in accordance with 440.13, their location shall be accessible but shall not be required to be readily accessible.

nformational Note No. 1 : See Parts VII and IX of Article 430 for additional requirements. Informational Note No. 2: See 110.26.

Examples where this exception apply include room air conditioners, home refrigerators or freezers, similar free-standing plug-in cooling appliances.

NEC 440.63 disconnecting means for room air conditioners gives more guidance for the disconnect for portable devices like room air conditioners

440.63 Disconnecting Means. An attachment plug and re- ceptacle or cord connector shall be permitted to serve as the disconnecting means for a single-phase room air condi- tioner rated 250 volts or less if

(1) the manual controls on the room air conditioner are readily accessible and located within 1.8 m (6 ft) of the floor, or

(2) an approved manually operable disconnecting means is installed in a readily ac- cessible location within sight from the room air conditioner.

440.64 Supply Cords. Where a flexible cord is used to sup- ply a room air conditioner, the length of such cord shall not exceed 3.0 m (10 ft) for a nominal, 120-volt rating or 1.8 m (6 ft) for a nominal, 208- or 240-volt rating.

440.65 Leakage-Current Detector-Interrupter (LCDI) and Arc-Fault Circuit Interrupter (AFCI).

Single-phase cord-and-plug-connected room air conditioners shall be provided with factory-installed LCDI or AFCI protection.

The LCDI or AFCI protection shall be an integral part of the attachment plug or be located in the power supply cord within 300 mm (12 in.) of the attachment plug.

Definition of readily accessible & within sight

NEC 430.107 Readily accessible & within sight means that the disconnect switch is visible from the controlled-device and can be reached and used without having to climb obstacles or use a ladder.

This distance is typically described as within 50 feet (15 meters), and in practice at most residential properties the disconnect is much closer (3-6 ft), on a wall or standard near the compressor/condenser unit.

Within sight of is defined as within 50 feet (15 m) and able to be seen from the component being disconnected (and vice versa). The disconnect also has to be directly accessible, so "seen through a window or over a fence" would not be acceptable as it would not be safe.

Typically there is also a GFCI protected outdoor electrical receptacle withgin 25 feet of the compressor/condenser, it's likely that those two features will be together at most installations.

We have read reports that some local building code officials may require a closer distance - 3 feet - to the switch.

Note that for the indoor equipment the rule is a bit different. NEC 440.14 permits the air handler disconnect to be on or even inside of a cover at the air handler unit, though in my OPINION on or adjacent-to the unit is safer as it doesn't require opening a panel into the air handler itself (where there could be moving parts or exposed wires) to access the service switch.

Maximum distance between disconnect or controller and an electric motor

NEC 430.102 disconnect for electric motors driving equipment or machinery provides minimum distance requirements for the disconnect for the electric motor or its controller.

NEC 430.102(A) Motor-Controller disconnect (paraphrasing) the disconnect must be in sight from the controller and must disconnect the controller from its power source. (A controller is defined in NEC 430.81 as the device used to start and stop a motor. )

It's worth noting that for commercial installations OSHA 1910.333 requires that equipment be powered off when being serviced, with the exception that some test procedures will require the equpment to be on. (Additional protection for the worker is required.)

NEC 430.102(B) Motor electrical disconnect (paraphrasing) the electrical disconnect must be within sight of the motor (and driven machinery operated by the motor). This rule provides safety for workers on equipment that might be switched on or off without power passing through a separate motor controller device.

Where both an electrical disconnect and a separate motor controller are both installed, at least one of these devices capable of turning off the motor itself (and thus turning off the machinery it drives) must be within sight from the motor and must be readily accessible.

Where the electrical motor disconnect is within sight of and readily accessible to both the motor controller and the motor itself and the equipment driven by the motor then the electrical disconnect will satisfy both NEC 430(A) and NEC 430(B).

Exceptions to these US NEC provisions are permitted where applying the provision is not feasible or not safe.

Where there are multiple motor controllers installed, NEC 430.102(A) permits the use of a single electrical disconnect switch that turns off all of the "coordinated" motor controllers.

Get Copies of NEC or Other Building Codes online

 

 

Reader Comments & Q&A

Copper pipes inserted into fuse clips in A/C switch - dangerous fire & shock hazard (C) Daniel Friedman at InspectApedia.comH

Watch out: Using a copper pipe where a cartridge fuse is required means that if there is an electrical problem such as overcurrent the wiring is not protected from overheating and setting the building on fire. The risk of replacing a fuse with a piece of pipe is fire or death.

Regarding the 1/2" copper pipes in place of fuses, doesn't that mean that there are large exposed chunks of metal at high voltage?

Cssey

I have found no electrical code nor manufacturer's installation instructions that prohibit the use of a fuse pull out instead of a circuit breaker.

However it is important that the ampacity or rating of the wiring and fuse or over current protection be the proper size for the equipment including any new equipment being installed.

Question: my old AC condensor is fed by a line from the house side of the meter to a fused disconnect (the kind you pull the fuse holder out to connect/disconnect). I'm replacing the unit with a new one. my local contractor and building department(Beverly Hills, MI) tells me the power feed must be changed to feed from a breaker in the service panel to the disconnect. Is that accurate? And if so, why?
Thank you
Casey

Can the air conditioner disconnect switch be located directly behind the condenser, or does it need to be to one side, or raised several feet above?

Not given explicitly

What is the minimum distance for an exterior AC Compressor breaker box and a water hose bib?

Anon

A clearance distance between the AC Compressor/Condenser unit and "electrical service" (perhaps you mean the electric meter or service entry) is not given explicitly in the model codes, but there are required clearance distances and working distances.

Please take a look at CLEARANCE DISTANCE, HVAC

and let me know if you have further questions.

Thanks for asking.

Is it code in most states for ac compressor to be a certain distance from the electrical service?

Anon

A clearance distance between the AC Compressor/Condenser unit and "electrical service" (perhaps you mean the electric meter or service entry) is not given explicitly in the model codes, but there are required clearance distances and working distances.

Please take a look at CLEARANCE DISTANCE, HVAC

and let me know if you have further questions.

Thanks for asking.

Is it code in most states for ac compressor to be a certain distance from the electrical service?

Kevin

I'm of course worried about guessing when I'm not clear what's happening, but in general, sure all circuit breakers for the AC system need to be in the ON position.

I noticed in the late afternoon that my AC was not coming on in the house. It was working fine just the night before and into the early morning. As the day progressed I noticed it was getting hotter in the house. I went to check the thermostat and it was completely blank.

So, I checked all the breakers.. they all seemed fine. There are two beaker boxes on the wall outside by the unit fan.. One looks like it gives the main power but then there is another one...

The main breaker was on.. but the other one was off. I reset them both.. then checked to see if the thermostat had come back on... it had not. So, I went and purchased a new thermostat. The original thermostat was not battery powered.

The new one was battery powered. I made sure to connect all the wires back properly. I finished the unit assembly. Then I turned the breaker the unit back on..

I was expecting the unit to come on, but of course with my luck it did not come on. I checked the fuse on the electrical panel in the main board of the unit, it was fine too. So, does both breakers outside need to be in the on position, and why does the unit still not come on with the replacement thermostat? Any Clues?

Ernest:

Sure, I don't see the issue, but may be I'm missing something in your question.

If you mean, not the main electrical panel but rather the service switch for the AC compresor, the switch has to be readily-accessible and in line of sight view from the compressor unit. Beyond that, any question of distance is in the purview of your local code inspector.

I want to install an ac compressor that is 25 feet from my breaker box. Is that allowed?

Eric

If I understand your question correctly, you're feeding an A/C unit from a main disconnect switch ahead of the main panel.

No don't do that.

The ampacity of the main disconnect will be sized to match the ampacity of the electrical panel, not the ampacity of the A/C unit.

For example if your main panel is 100Amps, the main disconnect will be a 100A switch.

But the A/C unit will typically be a 30A or 40A 220V device fed by wires rated to carry 30A or 40A. If you feed that wire and that AC unit from a switch that is rated to allow 100A you are not providing proper over-current protection to the AC unit nor to the wiring that supplies it.

The risk is an electrical fire, injury, or worse.

By code can you put a disconnect before the panel and then use the same disconnect to power up your ac unit then feeds your panel

Jim

The "code" won't address re-using old components;

A practical answer is that if the replacement parts fit inside the old enclosure with adequate clearance then there's no reason not to-reuse the old disconnect box enclosure except perhaps cost; in at least some cases the added labor and the cost of replacement internal parts may be higher than if the disconnect is simply replaced with a new, already-assembled unit.

Can a new A/C disconnect box be installed in the old box already mounted to the wall per national electrical code

You mean height from the roof surface? I expect it needs to be above possible snow height, must remain accessible, and must be in view of the HVAC equipment.

Is there a minimum distance required for a disconnect off of a flat roof? Disconnect is for a condensing unit.

You mean height from the roof surface? I expect it needs to be above possible snow height, must remain accessible, and must be in view of the HVAC equipment.

Is there a minimum distance required for a disconnect off of a flat roof? Disconnect is for a condensing unit.

HACR / HVACR -Rated circuit breaker at InspectApedia.comRe-Posting:

trevose rd said: are all 20amp breakers the same or are some specific to air condition circuits


Moderator Reply:

Trevose

RE: Are special HVAC-R rated or HACR-rated circuit breakers required for air conditioners and heat pumps?

Short answer: NO you don't need a special circuit breaker for your air conditioner: all circuit breakers sized for use on residential air conditioner units will be suitable. That's because virtually all such circuit breakers are already rated and approved for that use by having qualified / tested under UL 489.

For example Eaton Cutler Hammer, a producer of circuit breakers, says in their catalog, "All products 15-100A are HACR rated." (Source: Cutler-Hammer Miniature & Molded Case Circuit Breakers [Catalog] March 1999, retrieved 2019/09/07, original source: www.eaton.com/ecm/groups/public/@pub/@electrical/documents/content/pg74a01te.pdf)

While you may find a reference to an HVACR-Rated circuit breaker, or HACR-circuit breakers (to use the right acronym), provided the circuit breaker for your air conditioner is properly-sized, ANY conventional breaker will work fine.

When the electrical circuit for a compressor/condenser unit for an air conditioner or heat pump or refrigeration system is protected by a fuse, a special "slow-blow" fuse was installed to prevent nuisance fuse blowing during the initial high-current draw when those motors first started-up.

On changing to use circuit breakers (not fuses) in that application, to tolerate the turn-on current surge, PREVIOUSLY some circuit breakers were designed and tested specifically for their ability able to handle HVAC equipment power-on without nuisance tripping - to act like that "slow blow" fuse.

But that's no longer the case. In the U.S, Section 7.8 of the 11th edition of UL 489 granted HACR listing to ALL UL 489 Listed circuit breakers. Therefore there is no longer a requirement for special testing.

In sum, you don't need a "special" circuit breaker for your air conditioner because now ALL circuit breakers with a UL 489 listing are suitable for group motor applications requiring that HACR designation.

I emphasize "properly sized" because air conditioner compressor motors cause a brief surge in current flow at the moment of start-up that can trip the breaker.
For that reason, while a typical AC compressor unit might be wired for 30-Amp 240VAC the electrical codes permit installing of a circuit breaker one size larger (say 35A or 40A) to prevent nuisance tripping.

Take a look at the data tag on your air conditioner compressor/condenser unit, and use the Add Image button to add a sharp photo of it here.

I'll look at your data tag and together we'll doubtless see what circuit breaker is permitted.

However at least some of the circuit breaker manufacturers still make a point of LABELING certain of their breakers as HACR-rated.

Siemens provides a list of HACR-qualified circuit breakers at www.schneider-electric.us/en/faqs/FA230479/ but pretty much every modern circuit breaker has to meet UL 489.

Click to enlarge the circuit breaker label shown below and you'll see the HACR-rating

This Q&A were posted originally at InspectApedia Policies - https://inspectapedia.com/Admin/InspectApedia_Policies.php

The 3 ft. might be fine but there's more to service disconnect distance: The distances between the condenser unit and the service or shutoff switch also require that the shutoff be "line of sight" and "readily accessible"

Can electric be ran to outdoor condenser without disconnect as long as electric panel is outside within 3 feet

With the ducking and weaving that comes with not being able to actually see the installation that you're talkin about and a warning that of course there could be something there that is unsafe, I haven't found any restriction that prevents locating an emergency shut-off for an air conditioner outside compressor condenser unit below a window.

Can a 40amp ac disconnect be located under a working window

Hi Joe, nice to hear from you. I am nervous answering a question from an educator who knows more than I do, but here's my OPINION:

MAYBE:

Regulations for safety disconnect switch location require that the switch be readily-accessible. If in a particular case, locating the disconnect behind the condenser unit has jammed it into a location that would not be readily accessible then that location is improper.

There has been a lot of chatter about where the switch must be, including just what is meant by "readily accessible" to include - within line of sight.

The intention of the electrical code such as NEC 440.14 (also see NEC 430.102) for these switches is two fold

1. having a switch that's readily accessible reduces the temptation of some techs to work on equipment live, hopefully reducing shocks and fatalities. It can be some distance away but must be visible from the A/C unit. There is a similar rule for room air conditioners that adds - Within 6 ft. of the floor.

2. in an actual emergency that might occur during service (this happened to me on a heating repair job) you want the tech to be able to turn the system off immediately - like "HELP MY TIE IS CAUGHT IN THE FAN"

I would add that IF the installer put the shut off for the condenser unit behind the unit, presumably on a building wall, such that there is so little space that it can't be easily operated, then I suspect that the unit itself is improperly-located. Even for the side of a condenser unit that doesn't need air intake/exhaust and that is not removed for service, typically the manufacturer is going to require it to be 12" or more from the wall.

Can you show me a photo of the switch and condenser in question?

My photo below shows a unit that is too close to the wall and is tipping, but it's disconnect is readily accessible to one side.


IMAGE LOST by older version of Clark Van Oyen’s useful Comments code - now fixed. Please re-post the image if you can. Sorry. Mod.

Hi Joe, nice to hear from you. I am nervous answering a question from an educator who knows more than I do, but here's my OPINION:

MAYBE:

Regulations for safety disconnect switch location require that the switch be readily-accessible.

If in a particular case, locating the disconnect behind the condenser unit has jammed it into a location that would not be readily accessible then that location is improper.

There has been a lot of chatter about where the switch must be, including just what is meant by "readily accessible" to include - within line of sight.

The intention of the electrical code such as NEC 440.14 (also see NEC 430.102) for these switches is two fold

1. having a switch that's readily accessible reduces the temptation of some techs to work on equipment live, hopefully reducing shocks and fatalities. It can be some distance away but must be visible from the A/C unit. There is a similar rule for room air conditioners that adds - Within 6 ft. of the floor.

2. in an actual emergency that might occur during service (this happened to me on a heating repair job) you want the tech to be able to turn the system off immediately - like "HELP MY TIE IS CAUGHT IN THE FAN"

Is there a regulation that requires the electric disconnect switch to not be located behind the exterior condenser unit?

It depends on type & capacity, $5 TO $150

Watch out: do not try working in an electrical panel as you could cause a fire or be killed

My landlord took pull out circuit braker out of unit outside how much do they cost

Question: replace the cover or door of an A/C cutoff box

(Sept 7, 2016) Nola said:
Can I buy just a door for a/c cut off box

Reply:

If you are referring to an indoor or outdoor electrical power switch, check with your local electrical supplier.

If you are referring to the compartment cover or door of an air handler, possibly so, if you can read the manufacturer's name and box model number, just give the manufacturer a call.

Other electrical switches and controls such as an air conditioner or heat pump pressure safety switch found on or near the compressor/condenser unit and in some window and through-wall units can also shut down an air conditioner or heat pump system, as we discuss below in this article.

  • Air handler service switch inside on or close to the air handler unit itself
  • Air handler blower compartment safety switch: a safety interlock that will turn off electricity to the air handler or blower unit if the blower compartment door is not securely shut.

    If your air conditioner blower will not start this switch and the blower compartment doors should be checked.

    See BLOWER FAN OPERATION & TESTING
  • Air conditioner/heat pump contactor relay switch: turns on high amp drawing equipment such as the compressor motor.

    See CONTACTOR RELAY DIAGNOSIS & REPAIR
  • Air conditioner or heat pump pressure control & pressure safety switches: turns off the system at excessive refrigerant pressure and in some systems at too-low pressure. Also used in automotive air conditioning.

    See PRESSURE CONTROLS & SAFETY SWITCHES
  • Electrical panel circuit breakers or fuses will be provided separately to control the air handler (blower system) circuit and the compressor/condenser circuit. Of these the compressor is usually supplied by a 240V circuit and the air handler by a 120V circuit.

...

Continue reading at CONTROLS & SWITCHES, A/C - HEAT PUMP or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see A/C HEAT PUMP CONTROL / SWITCH FAQs - questions & answers posted originally on this page

Or see these

Recommended Articles

Suggested citation for this web page

COMPRESSOR DISCONNECT SWITCH at - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

Or see this

INDEX to RELATED ARTICLES: ARTICLE INDEX to AIR CONDITIONING & HEAT PUMPS

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Technical Reviewers & References

Click to Show or Hide Citations & References

  • Trane Corporation, "TUX-D-2 Upflow/Horizontal Left Downflow/Horizontal Right Condensing Direct Vent Gas Fired Furnace XR90 TUX040-series, single-stage fan assisted combustion system" from Trane, retrieved 11/5/2014, original source: http://www.trane.com/commercial/uploads/pdf/1112/tux_c.pdf
  • Thanks to Alan Carson and Bob Dunlop, Carson Dunlop, Associates, Toronto, for permission to use illustrations from their publication, The Illustrated Home which illustrates construction details and building components. Carson Dunlop provides home inspection education, publications, report writing materials, and home inspection services. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
  • Thanks to Lester Richer, a professional home inspector, for the reminder that a bad air conditioner condensate drip tray switch can shut the whole system down.
  • Behr Hella Service A/C pressure switches,
  • Grainger, http://www.grainger.com/
  • Ranco Corporation, http://www.invensyscontrolseurope.com/ranco/ Tel (Europe) +44 (0)845 130 5522
  • Sensata Technologies, 529 Pleasant Street, B41 Attleboro, MA 02703-2964 Phone: 1-248-692-5600 Fax: 1-248-692-5630 Email: [email protected] Web: www.sensata.com, pressure switches for automotive air conditioning systems
  • Micro Pneumatic Logic, Inc., Pompano Beach, Florida Tel. (954) 973-6166 - pressure switches
  • Modern Refrigeration and Air Conditioning, A. D. Althouse, C.H. Turnquist, A. Bracciano, Goodheart-Willcox Co., 1982
  • Principles of Refrigeration, R. Warren Marsh, C. Thomas Olivo, Delmar Publishers, 1979
  • "Air Conditioning & Refrigeration I & II", BOCES Education, Warren Hilliard (instructor), Poughkeepsie, New York, May - July 1982, [classroom notes from air conditioning and refrigeration maintenance and repair course attended by the website author]
  • Refrigeration and Air Conditioning Technology, 5th Ed., William C. Whitman, William M. Johnson, John Tomczyk, Cengage Learning, 2005, ISBN 1401837654, 9781401837655 1324 pages

Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

  • Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
  • ...
  • Carson, Dunlop &Associates Ltd., TorontoCarson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: [email protected] The firm provides professional HOME INSPECTION SERVICES and also extensive HOME INSPECTION EDUCATION and home inspection-related PUBLICATIONS. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.

    Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material.

    The ILLUSTRATED HOME illustrates construction details and building components, a reference for owners & inspectors.
    Special Offer: For a 5% discount on any number of copies of the Illustrated Home purchased as a single order Enter INSPECTAILL in the order payment page "Promo/Redemption" space.

    TECHNICAL REFERENCE GUIDE to manufacturer's model and serial number information for heating and cooling equipment, useful for determining the age of heating boilers, furnaces, water heaters is provided by Carson Dunlop Weldon & Associates
    Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on any number of copies of the Technical Reference Guide purchased as a single order. Just enter INSPECTATRG in the order payment page "Promo/Redemption" space.

  • Home Reference Book - Carson Dunlop AssociatesThe HOME REFERENCE BOOK - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.
    Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.

    Or choose the The HOME REFERENCE eBook for PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones.
    Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order. Enter INSPECTAEHRB in the order payment page "Promo/Redemption" space.


    GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.    GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.   GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.
  • Building inspection education & report writing systems from Carson, Dunlop & Associates Ltd

    COMMERCIAL BUILDING INSPECTION COURSES - protocol ASTM Standard E 2018-08 for Property Condition Assessments

    HOME INSPECTION EDUCATION COURESES (Canada)

    HOME INSPECTION EDUCATION COURSES (USA) including home study & live classes at eleven colleges & universities.

    HOME INSPECTION EDUCATION: HOME STUDY COURSES - [email protected] Training 10-course program.
    Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on these courses: Enter INSPECTAHITP in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.

  • The Horizon Software System manages business operations,scheduling, & inspection report writing using Carson Dunlop's knowledge base & color images. The Horizon system runs on always-available cloud-based software for office computers, laptops, tablets, iPad, Android, & other smartphones
Sours: https://inspectapedia.com/aircond/AC-Compressor-Disconnect-Switch.php
How to install an A. C. Disconnect

4GAC222NF 60A NON-FUSIBLE PULLOUT DEVICE

8064P 60A NON-FUSIBLE PULLOUT DEVICE

Eaton air conditioning disconnect, Fused pullout, 30A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 1.5 hp at 120V, 3 hp at 240V, Black

Air Conditioning Disconnect, Fused pullout, 30A, 120/240V, 10 kAIC, #14-2 Cu/Al 600C or 750C, NEMA 3R Polycarbonate enclosure, 1.5 hp at 120V, 3 hp at 240V, Black

Eaton air conditioning disconnect, Fused pullout, DIY packed, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Air Conditioning Disconnect, Fused pullout, DIY packed, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 600C or 750C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Eaton air conditioning disconnect, Non-fused pullout, Retail package, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Air Conditioning Disconnect, Non-fused pullout, Retail package, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 600C or 750C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Eaton air conditioning disconnect, Fused pullout, 30A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 2 hp at 120V, 3 hp at 240V, Black

Air Conditioning Disconnect, Fused pullout, 30A, 120/240V, 10 kAIC, #14-2 Cu/Al 600C or 750C, NEMA 3R Polycarbonate enclosure, 2 hp at 120V, 3 hp at 240V, Black

Eaton air conditioning disconnect, Fused pullout, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Air Conditioning Disconnect, Fused pullout, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 600C or 750C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Eaton air conditioning disconnect, Non-fused pullout, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 3 hp at 120V, 10 hp at 240V, Black

Eaton air conditioning disconnect, 60A non-fusible pullout device

Eaton air conditioning disconnect, 60A NON-FUSIBLE PULLOUT DEVICE

Eaton air conditioning disconnect, Bussmann labeled metallic pullout switch 30A FUSED

Eaton Bussmann series FNQ fuse, 500V, 0.30A, 10 kAIC at 500 Vac, Non Indicating, Time delay, Ferrule end X ferrule end, Nickel-plated bronze endcap

Eaton air conditioning disconnect, Bussmann series 30A FUSIBLE GFCI, 120/240V, 30A, 10 kAIC, Fused pullout, NEMA 3R, ANSI 61 gray

Eaton air conditioning disconnect, Bussmann series F60 fuse, 500V, 30A, 100 kAIC Vac, 50 kAIC Vdc, Non Indicating, Fast Acting, Ferrule end X ferrule end

Eaton air conditioning disconnect, Bussmann labeled metallic pullout switch 60A FUSED

Eaton Bussmann series F09B fuse, Silver Plated Cap, 250V, 2-1/2A, Non Indicating

Eaton air conditioning disconnect, Bussmann series 60A Fusible GFCI, 120/240V, 60A, 10 kAIC, Fused pullout, NEMA 3R, ANSI 61 gray

Eaton air conditioning disconnect, Bussmann series F60 fuse, 500V, 20A, 100 kAIC Vac, 50 kAIC Vdc, Non Indicating, Fast Acting, Ferrule end X ferrule end

Eaton air conditioning disconnect, BUSSMANN LABELED METALLIC PULLOUT SWITCH 60A NF

Eaton Bussmann series enclosed rotary disconnect switch, Non-fused, Selector, 600V, 63A, Red, NEMA rating 4

Eaton air conditioning disconnect, Bussmann series FNQ fuse, 500V, 0.25A, 10 kAIC at 500 Vac, Non Indicating, Time delay, Ferrule end X ferrule end, Nickel-plated bronze endcap

Eaton air conditioning disconnect, Bussmann series enclosed rotary disconnect switch, Non-fused, Pistol handle, 600V, 80A, Black, NEMA rating 4P

Eaton air conditioning disconnect, 60A/2P Air Conditioning Disconnect (Molded Case Switch)

B222P-60NF 60A NON-FUSIBLE PULLOUT DEVICE

Eaton Air Conditioning Disconnect, Molded case switch, 60A, 120/240V, 10 kAIC, #14-2 Cu/Al 60°C or 75°C, NEMA 3R Polycarbonate enclosure, 10 hp at 240V, ANSI 61 gray

Eaton Air Conditioning Disconnect, Molded case switch, 60 A, 240V, 10 kAIC, #14-3 Cu/Al 60°C or 75°C, NEMA 3R Galvanized Steel enclosure, 10 hp at 240V, ANSI 61 gray

Eaton Air Conditioning Disconnect, Molded case switch, Retail package, 60A, 240V, 10 kAIC, #14-3 Cu/Al 60°C or 75°C, NEMA 3R Galvanized Steel enclosure, 10 hp at 240V, ANSI 61 gray

Eaton air conditioning disconnect, Fused pullout, 30A, 120/240V, 10 kAIC, #14-3 Cu/Al 60°C or 75°C, NEMA 3R Galvanized Steel enclosure, 2 hp at 120V, 3 hp at 240V, ANSI 61 gray

Eaton air conditioning disconnect, Fused pullout, 15A ground fault receptacle, 30A, 120/240V, 10 kAIC, #14-3 Cu/Al 60°C or 75°C, NEMA 3R Galvanized Steel enclosure, 2 hp at 120V, 3 hp at 240V, ANSI 61 gray

Air Conditioning Disconnect, 30A Fused, Mettalic, 15A GF Self-Test

Sours: https://www.eaton.com/us/en-us/catalog/low-voltage-power-distribution-controls-systems/ac-disconnects.html

Disconnect air conditioning

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How to remove Air Conditioner unit

He did not stop after a couple of jerks of sperm, but hammered and hammered. then he slowed down, and only then I noticed that the penis began to surrender strength. it feels like he gets up on command, on command to go to bed. "can I take a photo of your priests.

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Vadik released me, I turned to him, and our eyes met. We silently blinked at each other for a few seconds, coming to our senses, then Vadik said in a slightly hoarse voice, pointing to the door:. Take your pants. I turned mechanically, opened the door, without even thinking to check if there was anyone on the landing, bent down and picked up my trousers.



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