Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC

I am a retired electrical engineer and after a lot of research I found the Intermatic AG300 to be the very best surge protector one can get for their air conditioner system. It is very easy to install and you do not need to hire anyone to do it for you. What prompted me to purchase these was because the new air conditioning systems that were installed on my home comes with free 6 month check-ups. They insisted that surge protection is essential and they are actually correct. But they wanted $3100 to install them on 2 outside 240 volt compressor units and 2 inside120 volts air handlers, for a total of 4 surge protectors. I bought these on Amazon and installed them in about 15 minutes each. Incredibly easy if you have any common sense at all. You don't need to be an electrician. The 2 outside units for the compressors are wired as follows: (1) Turn off the breaker. (2) The side of each A/C disconnect have sectional knock-outs on them. The smallest is 1/2 inch and that is the one to knock out using a screwdriver and a pair plyers lightly tapping on it until it comes out. Move it back and forth and it will break free. (3) Slide the wires through this hole with the rubber grommet and locknut on the OUTSIDE. (4) The remaining locknut gets slipped over the wires inside and tighten down on the stem you stuck through the original 1/2" hole. Now you have a watertight connection. (5) There are 2 black wires and 1 white. Cut the wires shorter so there is not too much wire inside the disconnect and for the surge arrestor to work better as longer cables adversely affect it. The shorter, the better! (6) Using a flat head screwdriver, install the white wire to the bare ground bus bar where either bare wires or green wires are already located. (7) Then install the 2 black wires on the "LINE" side of the disconnect. The LINE side is the power side that comes from the breaker box. The "LOAD" side is the ones that go the the A/C unit. The word "LINE" is usually printed inside the disconnect. There will be 2 "LINES" on each disconnect to match the 2 black wires coming from the surge arrestor. Turn on the breaker and you are done. Check to make sure the green light comes on. If not, you have most likely not connected it properly. Keep an eye on the green light over time. Should it burn out, a very heavy surge has caused it and you will need to replace it. As for the inside 120 volt air handler units, the same exact installation method is used except the wiring. Since the air handler unit is 120 volts, BOTH black wires get twisted together and attached to the power connection inside the unit. Usually this is a wire nut that has the power wire (usually black) and air handler wires together. Take it loose and add the 2 black wires under one connection and make tight. Then the white wire gets connected to the white wire supplying the air handler. This is the neutral wire and NOT the green or bare ground. Once this is complete, turn the power back on and the green light will illuminate. Also, most of the time you do not need to turn off the breaker to the air handler. The USA electrical code requires an ON/OFF switch within 6 ft. of the unit. This will look like a switch you have inside your home. Turning this off is the same as turning off the breaker as there will be no power inside the air handler while you install this.

Easy to install and gives a little peace of mind knowing another level of protection has been added since my A/C is loaded with electronics.

Easy install and the green indicator lamp is lit. I installed this same product 4 years ago at my previous home and never had any issues. Hard to tell if it works or not, but I trust that it is.

This surge protector is very nice and straightforward to install. I have it on my quick disconnect for a minisplit and do experience a lot of power loss during certain times of the year. It’s been going for almost a year now with no issues. The status light is very easy to see.

This was for a mini split system, and if there was a storm and the lightning would hit the electrical line, it would not blow out the Mini Split and not worry about putting a new one in. We bought this for every Mini Split we have put in our house. Would buy again.

I installed two of these into two furnaces/air handlers. Installation is easy if you have an extra punchout in the cabinet. The pre-stripped wires need to be stripped a bit longer to work right. Make sure to use the correct size of wire nut, these are 10AWG wires and on a 120V system you'll combine both hot line together. There is a major downside to the "connected devices warranty." It states, verbatim: Upon receipt of the damaged AG3000, lntermatic will investigate whether the AG3000 had a defect in material or workmanship that led to the damage to your equipment. If the findings determine there was a defect in material or workmanship, lntermatic will cover any costs beyond your homeowner’s coverage up to $7,500.00." So the way I understand this: you first file an insurance claim, and hope that all the stars align. After they remove the deductible, you may get a few hundred dollars AND THEN Intermatic's warranty picks up the remainder. Filing and working through that process adds a huge amount of delay and we all know that insurance companies are the in the business of cashing checks rather than cutting and sending their customers checks. Because Intermatic stars coverage after insurance, the whole process is fraught with insurance company pushback, potentially large deductibles that eat into making you whole, lots of paperwork, and anxiety. While the product appears solid, I put zero value into this connected devices warranty.

I installed this on my a/c quick disconnect for added voltage surge protection to help protect the inverter board in the condenser. Easy to install.

A Must have

Este dispositivo cumple satisfactoriamente para protejer los Equipos eléctricos y Electrónicos, de los daños de los Sobrevoltajes que ingresan de la Red Electrica derivado de la presencia de las Tormentas eléctricas, y los sobrevoltajes derivadas de suitcheos en la propia Red Electrica, desde luego que se deje contar con una toma de Tierras de buena Calidad, contrariamente los resultados pueden no ser los esperados.

Worked well for our mini-split install. Recommended. We have two mini-splits and the other has the same unit and has been in service for about 7 years and we average probably 5 power failures per year. That one is still working.

A must if you live in a place where electricity is flickering or goes out constantly. It will protect your investment.

Unit arrived as advertised. Easy to install. Time will tell how it protects my electronics out in the country.

Have installed for a while, still working great.