17

The burn marks on the air conditioner air handler are from the torch the installer used to solder the copper pipes to the unit. The pipes then go the compressor located outside the unit. Most installers can do this job without scorching the unit.


16

Holy smoke, this is a "Rule of Six" panel! A Rule of Six panel has a "Main Breaker" area with up to six main breakers. All must be shut off to shut off the power. All six have their buses energized at all times. Then, one of those breakers feeds an "internal subpanel" area with any number of breakers. In this case, your panel is built as a "Rule of ...


10

Most units require a pad when installed . at the age of the unit I would probably not try to put a pad underneath as this may create a leak. In 99 the common refrigerant was R22 and the cost of a recharge if a leak is created may cost close to $1k as r22 is being phased out and local shops in my area charge 100 per pound.gravel around the unit could keep ...


9

Very few HVAC systems aren't able to handle abrupt power loss. I've flipped the switches on dozens of systems hundreds of times to change filters and perform other service. The gas valve will close and the control boards have algorithms to recover. It may feel nicer to shut them down gently, but there's no good reason to worry about it. After all, power ...


8

Using a larger ground conductor is fine. Using a smaller gauge wire for grounding was common in the past, but not correct anymore. The grounding conductor should be at least as large as the other conductors.


8

When the person you spoke to said to measure the "temperature difference between the return and supply sides". What they were talking about, is what's known as Delta T (of the evaporator). It sounds like you took the first measurement in the proper place (or close to it), but not the second measurement. The "supply side" refers to the ...


6

If a breaker is tripping regularly, that's a serious problem you should look at. That is not normal or acceptable. It means something is wrong with your overcurrent protection, or a defective device actually drawing too much current. It is normal for circuit breakers to allow overcurrent for a short amount of time. This is needed by motors to start, ...


6

Always short the capacitor as early into the disassembly process as you can. You may accidentally discharge it when handling it or removing it from the unit, and these components have enough energy to kill you. I make sure to wear jeans and leather boots with a rubber sole when discharging capacitors, and always when it's relatively dry out. I keep my ...


6

I wouldn't short the cap to discharge it. When you do that, a huge current flows for a very short time. This current is almost certainly far beyond the rated current capabilities of the cap. You may not destroy the cap, but you are overstressing it and shortening its life. I would recommend disconnecting one terminal of the cap first, then shorting it ...


6

I would start by turning the thermostat off, including the fan setting to "off" and not "auto". The HVAC breaker should be a 240v double pole breaker. Most homes have four of those. One for the water heater, range, dryer and the HVAC. Turn the breaker to the HVAC off. If you have a heat pump, there will be a shut off near it outside (probably mounted to the ...


6

Is it time based on the power consumption? I will try to be polite but Hell No. when your system is running at full load and hot the power may get close to RLA , RLA is like FLA for motors. If they are drawing less they are not fully loaded. Having a worn out compressor could cause a lower power consumption but then electrical parts would not be overheating....


5

The text Volts 208/230 Phase 1 means the device will run on either 208 volts or 230 volts (which is nominally 240 volts). In the amps section, the separated numbers (which are the same) are the corresponding value for operation on 208 or 230 volts, respectively.


5

Hard to say based only on what you show and describe here. We can't really know exactly what you have without seeing what's inside. The 2 pole 50A breaker what has the word "Main" written next to it is probably the main breaker for all of the power coming from your utility meter, or al least may have started out that way at one time. But when you say that ...


5

You paid a higher cost to have an AC with the built-in breaker circuit to handle the output from a small solar system. The built-in breaker limits the size of the solar system that you can install for your house. I would look at it as a Marketing pitch. Is there some benefit to using this "solar ready" feature when I get solar installed? Or ...


4

This DOE reference indicates, with better double glazed windows and better insulation, that ducts should not be run in outside walls anymore. HVAC Ducts Shall Not Be Run within Exterior Walls In the past, it was common practice to run ducts inside a wall cavity of an exterior frame wall. It is sometimes done today. However, we have learned that ...


4

Sure -- or at least, there's nothing about having round ducts in the attic that would make A/C installation more difficult. In fact, because cold air is more dense than warm air, ceiling vents are usually considered better for cooling. The cool air flows down from the ceiling, helping ensure your rooms are evenly cooled. That's why many houses in warm ...


4

According to Trane installation instructions, the technician is correct. They do require 3' of clear space in front of the control box. As for why the technician chose this orientation, I can only speculate. It looks to me like the access panel is on the corner of the unit, which would mean there has to be 3' clear space at the corner. Obviously the ...


4

Home heating and a/c duct systems have changed over the years. The best systems and the most versatile were installed with both high and low returns and supplies. For heating the low registers were used to supply the heat at the floor and the low returns were to take the cold air off the floor. In summer the high supply and returns were used for the same ...


4

If you were a customer of mine and wouldn't let me rip out that equipment, I would walk away. There isn't a chance in the world I would add additional load to the existing over current protection. The load center you have is rated for energy consumption from the 60's. Modern day energy consumption creates more heat in the equipment because of harmonics, ...


4

To me that looks like a water leak that is being pushed by the air flow. I would be checking for a leak above that location.


4

There are a few causes for this, and the most common are in two categories - bad air flow and low refrigerant. Bad airflow can be caused by a dirty filter, clogged ducts, or a poorly performing fan. If the (relatively) warm air from your house isn't blowing over the coils, the condensation they normally create starts to freeze. Once they start to freeze, ...


4

There may be some opinion on top of what I believe to be true. There are some large flex duct sizes but the ribs are horribly inefficient. Metal trunk is also better suited when going vertical it is easier to secure. Frame work is square to box-in a round trunk the box would be much larger. I have seen DIY main trunk in a home we were replacing the “mess” ...


4

A low charge can cause evaporator freezing. If your cap was bad that usually indicates an older system. Micro leaks have caught up, probably R22 and it is getting expensive. A 5 ton system will take 4-6 lbs normally to be fully charged but may give you another 5 trouble free years. In most cases the icing will get worse. It could also be a throttle valve ...


3

Underpowered transformer Sounds like you may not have gotten an equivalent replacement. When looking for a replacement transformer, you should be concerned with Input, or primary voltage Output, or secondary voltage Volt-amperes (VA) rating. If the transformer is not designed to supply the amount of current needed by the components on the circuit, it will ...


3

It's a balancing problem, fairly typical for a one-zone heating system spanning an entire house. Mind you, I'm a bit concerned with a setup that kicks on the A/C in heating season - being from a primarily heating climate, we typically have a "winter/summer" or "heating/off/cooling" mode switch either on the system/boiler/furnace or on the thermostat to ...


3

Delta T after the unit has reached setpoint temperature (if it will) I have always used 20 °F. Latent heat must be gone and now we are reading sensible heat temperatures. If anyone is going to attempt to walk up to an A/C that is off, turn it on, follow all the above instructions about wet bulb and dry bulb, don't expect any of them to be right on. One ...


3

I had the same problem with cold drafts coming thru the ac vents that are not used for heating in the winter (I too have baseboard hot water heating and only use the ac and ducting in the summer). I have 3 returns and a lot of supply vents and covering each one individually would be time consuming and not practical. Instead I pulled out the filter from my ...


3

The air in your duct work is cold because it is running through the attic which is not heated. There will be some air flow through the ducts because they are not a "sealed container" they are designed to move the air in your home. As for the DIY project if your covers are metal I would suggest using a magnetic tape or adhesive sheets to attach them. Or ...


3

This is the answer to your actual question: "insulating the coolant pipe inside the actual AC unit itself." As you correctly observed, if the outside pipe "should" be insulated (it should), then the inside pipe "should" also be insulated for all the same reasons everyone pointed out. However, the key is "should" vs "must." For argument's sake, say the ...


3

We had the same problem in our house, and we've simply lived with it - having had HVAC companies come out and inspect or evaluate it. They all said the system was in good working order, and was appropriately sized for our house. This year we replaced 3 windows and a doorwall in the first floor of the house, and suddenly we can not only maintain a ...


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