You are watching: 404a walk in freezer operating pressures
head pressure is as well high mate. R404a massively loser effciency ~ 250 psi.should be around 215-230..Your evap coil isnt fully flooded and you have really low suction pressure so id speak you have actually the wrong size orifice or a blockage.
Air top top the device due a possible recent service? The existence of air rise the discharge pressure.Blow the R404A circuit with nitrogen. Might be together licencetochill stated a blockage in nearly circuits.
what do evap is it?some have a orifice in the distributor.ie one orifice because that gas kind i think buffallo trident is one of them. Is may be a possibility or is there any type of kinks in the distributor.
Assuming you have actually fitted a TEV and also not a TV. Firstly check your superheat across the coil. This will confirm a starved coil so then examine your valve it may be partly discharged or filter blocked.Also the external connection should yes, really be after ~ the bulb
is over there a warmth exchanger by any type of chance in the loop? they have the right to implode,a dodgey CPR ? simply a different to the TX.
Sound as you acquired a restriction somewhere in the system.What you define is usual for such situation
head pressure is too high mate. R404a massively loser effciency ~ 250 psi.should be roughly 215-230..Your evap coil isnt fully flooded and you have very low suction press so id to speak you have actually the wrong size orifice or a blockage.
I disagree completely.1. Just how you conclude the HP is too high? you don"t know the ambient no one the air on the the condenser.2. How have the right to a refrigerant - R404a in this situation - shed its efficiency?3. Why in ~ a sudden must it loose efficiency if the HP raises indigenous 230 psi to 250 psi?I agree v the 2nd part of friend post.
It"s far better to save your mouth shut and give the impression that you"re stupid 보다 to open up it and also remove all doubt.
It"s better to store your mouth shut and also give the impression the you"re stupid 보다 to open up it and also remove all doubt.
Assuming you have actually fitted a TEV and not a TV. Firstly examine your superheat throughout the coil. This will confirm a starved coil so then check your valve it may be partly discharged or filter blocked.Also the external connection should yes, really be ~ the bulb
What distinction should it make if a TV rather of TEV?The SH end the coil can be OK but the coil can partially be starved.Why should the ext. Link be installed after the bulb? Isn"t the even better that that is mounted just the contrary way? offering the fact that friend speak about TEV one TV, i assume you"re referring to Danfoss valves?
It"s much better to store your mouth shut and also give the impression the you"re stupid 보다 to open it and also remove every doubt.
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To summarize:Air in the device will not starve you coil partially, the will increase HP and discharge temperature.No or wrong orifice in distributor.Distributor not encountering up or down.Blocked capillary pipe from distributor come coil.The TEV can"t it is in the problem, all rows must then it is in starved or flooded.You need to measure every circuit in your evaporator top top the same location to view which circuit is blocked.Other feasible cause: as soon as circuit has actually no load (ice on that circuit, perhaps on the inside of the evaporator) or the pan isn"t punch on that circuit. This not loaded circuit is flooded and the TEV bulb senses this and also closes thus all the other circuits, do the efforts to keep the SH that this one , practically not loaded circuit. Resulting in one circuit which appears working however on a very low evaporating temperature because the evaporator is working on only one of its partly loaded circuits.This phenomena happens when one row is freezing horizontally, greatly the upper or the lower component of the coil
It"s better to save your mouth shut and give the impression that you"re stupid 보다 to open up it and remove all doubt.