Greetings all. This unit has been a pain for a while, inherited this account a year ago from a contractor that did not need to be on this account. Ex. Taking out refg when system was going off in high head due to plugged cond coils, replacing a 1 HP motor on another unit with a 1/2 HP motor, bypassing all economizers, overcharging systems that where restricted, and so on.
Anyways this unit is undersized for the area it serves, and never satisfies Y1, The initial problem was it would lock Stage 1 compressor out on the CLO board due to freeze stat in colder months (Econ weather). Spoke to Carrier tech support and they suggested we add a hot gas bypass unloading head and fan cycling switches. The compressor did not have a suction cut off or hotngas head before. Did this and set the the unloader up to unload at 58 and load back up at 80. After all was done I noticed this loading and unloading it rather fast, aprox 3-6 second. Carrier assured me this is normal, are they correct?
Now 2 months later and no complaints we have a compressor grounded on all three legs. I know this compressor has been put through hell over the years so that could be the cause in itself. Until 3 months ago I was unaware a hot gas head even existed, only thought suction cut off heads existed. Did I set my load and unload pressures incorrect? The new compressor comes with a suction cut off head. So should I use that instead of the hot gas head? Please any help would be greatly appreciated...