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I have a Trane programmable zone sensor. Model BAYSENS119A connected to a YCD360 (can provide full model # if need be) After configuring the sensor, "E1" and "E2" flash on the screen. In the manual...

Is it possible that there is a ground fault somewhere else in the building causing some sort of ground loop? This may not be what caused the motor to burn but may be the cause of your limited...

None of the systems I retrofitted employed pistons after converting to 410A. The largest system I did was 5 ton. Some utilized pistons with 22 but I put in TXVs for 410A. Some others utilized TXVs...

I have retrofitted some R-22 systems to R-410A in the past. You should be okay if you can determine the proper orifice size and that the coil is rated for the pressures of 410A of course. I've seen...

Low, med, and high. Room temp will be anywhere from 125F to 10F. Glycol temps are usually within 10 degrees of the room temp depending on room load, loop reheat, etc. We primarily select...

Turns out the previous mechanic for this area did not understand what a flooded evap is. I climbed up to the system last week to verify a few things and it is most certainly a DX cooler. We will be...

Ran into this two years ago on a Carrier rooftop (forgot exactly which model, remember serial being from late 80s) with electric heat. Building service was 208Y/120. RTU nameplate was 460V. RTU...

Pretty soon we're going to be retrofitting a small chiller system with a flooded evap. The system currently utilizes R-502/mineral oil. A decision has not yet been made as to what refrigerant/oil...

We have Carlyle 06Ds and 06Es for most of the systems with dry-well type heaters, so it's not an issue with those comps. However, most of our pumpdown systems are using Copeland 6RA4 compressors...

I absolutely can not stand it when I find flare nut threads that have been sealed/doped. If you have a leaky flare fitting and you can't stop the leak, the tube needs to be re-flared. If you don't...

I agree. It does no bad having the crankcase heaters operating no matter what the situation is. More often than not in these particular systems a fair amount of liquid will return to the crankcase...

If you are receiving a new compressor anyway, why not just try XL start before installing the new compressor? We test a lot of motors and compressors, including Danfoss. You'd be surprised what...

I am just curious as to what other people's thoughts are on using crankcase heaters with a pump down system. There has been some extensive debate on this topic at work.

We have several pump...