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What is normal R22 superheat? - HVAC-Talk just look at a superheat chart you just take a couple things into account like ambient temperature and some other stuff and it will tell you what the superheat should be, as long as it is a fixed oriface, not a TXV The superheat tells you how much refrigerant is in the evap and how the unit is performing The subcool tells you proper charge
Discharge Superheat - HVAC-Talk discharge superheat is one of my favorite topics and checks it is the sum accumulation of the entire refrigeration system but, at the end of the day, it isn't a directly adjustable measurement no valve no knob nothing to adjust
Is subcooling the best way to charge 410a? - HVAC-Talk Set airflow, charge by superheat for fixed orifice, charge by subcooling for TXV then check superheat BTW, the biggest problem with 410a is the POE lubricant It really soaks up the moisture and makes a molecular bond with it It's also an excellent cleaner of crud from the inside of refrigerant lines
superheat on r-404a - HVAC-Talk The walkin box I'm working on, trying to achieve -10 F (which it never had problems achieveing in the past) All of a sudden decided to creep up 5 degrees Here are the readings Head Pressure 250 psia (air temp into condenser coil 77-78 F ) 250 head pressure = 104 deg F subcooling
Discharge Superheat - HVAC-Talk Discharge Superheat Below is a collection of contributions to HVAC-Talk from various members Jayguy I LOVE talking about discharge superheat! i think that it is one of the most under used items that we DON'T measure i can tell you more about the compressor and system by only using discharge superheat than most
Low Subcooling and low superheat, not low on charge. . . Low subcooling is the result of the low superheat The txv is wide open causing the low superheat The low sc is because all the refrigerant is in the coil and the txv is open so you don't have back pressure to cause the subcooling to stack up and rise Sent from my iPhone using Tapatalk
High Superheat, Normal Subcooling - HVAC-Talk The superheat isn't based on the indoor temperature, it is based on the pressure temp of the evaporator, which is 38 That is low superheat Stop charging the unit if you want to keep it The fixed orifice doesn't control superheat, so whoever taught you how to do this stuff needs to be fired, and fast!
EWAD960C Daikin Chiller – Low Discharge Superheat Alarm Issue EWAD960C Daikin Chiller – Low Discharge Superheat Alarm Issue (air cooled screw compressor) Hello everyone, I’m dealing with an issue on a Daikin EWAD960C chiller after the compressor was replaced about a year ago The problem I’m facing is a low discharge superheat alarm, which occurs approximately once a week Steps I’ve Taken So Far: 1
Low Discharge Superheat - HVAC-Talk I have a Carrier Centrifugal chiller model 19XR-4747333CEH64S I am getting a Low Discharge Superheat protective limit alarm The manual states the primary cause is "oil in refrigerant" or overcharged Could someone pls explain the theory of how the oil can cause this alarm Thanks
Setting superheat on TXVs - HVAC-Talk I understand the concept of superheat but just want to be sure which way to turn it Also is there a standard as far as getting a TXV back to "factory settings" Ive inherited mechanical maintainence of a building with 2 80 ton A Cs