▲ 27 r/HVAC
Blast from the past: Old school DX system with hold-back valve, hot gas bypass & liquid injection.
Hey HVAC crew, found a bit of a rarity today. It's a direct expansion (DX) AHU setup with a flooded evaporator / hold-back valve system. The valve was defective, so I replaced it. It's got hot gas bypass and liquid injection to control capacity.
It’s pretty wild to see the lengths they went to before variable speed compressors, whether VFD or inverter-driven, became the norm.
Anyway, got it recharged and running. It’ll probably last another 20 years, even if the power bill is going to be through the roof.
u/ich-bin-ein-kaelte — 10 days ago
▲ 61 r/HVAC
They said, "I should take it a bit easier this week" after all, I can't replace a compressor every single day. Well, the heat is taking its toll on more than just the mechanics.
u/ich-bin-ein-kaelte — 16 days ago
I built a Blockly setup for the Arduino R4—not a toy, but something to actually work with.I am currently working on the English translation.
u/ich-bin-ein-kaelte — 18 days ago