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Russel reach in cooler blowing warm air
Hello, I have a russel reach in cooler WE17-15RP-A blowing warm air. Thermostat is set to 40 degrees, unit is blowing 54 degrees. Units compressor is running, condenser and evaporator fan motors are running as well. Hot shot 2 was the refrigerant, I am not familiar with it. Back side was about 15 psig while head was around 80. Coils were a bit dirty, I am going back to clean them. I just wanted more insight.
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6 Replies
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“HotShot” is a line of refrigerants by Icor. Like calling refrigerants “Freon”. Do happen to know whether it is R414B or R417C in the machine. Also What is used for a metering system. Cap tube or TXV. Not knowing the ambient temp, condenser inlet temp prevents me from being able to evaluate your head pressure, but 80 seems very low. Low head is low charge, low load, Low ambient, or pump problem. Low load can be from a metering problem. Evaporator starving.
The most common thing I’ve seen on them is the charge tap leaks. But Mineral oil will create restriction problems with cap tube systems and some alternative refrigerants. The R417C was made to replace R134 and other R12 interim refrigerants like R401A, B and R409.
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Thank you for the information. After further research the system is r417c. The system uses a capillary tube. The ambient air temperature was about 58 degrees. I was assuming the charge was low as well.
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I agree, sounds like a leak somewhere.
Most refrigerators end up leaking at the evaporator coil, generally at the U bends from what I’ve seen. Some bubbly leak detector or soap and water will generally reveal it.
I’ve also seen the body of TXV’s leak, which I don’t yours is.
So my bet would be on a leak.
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Olivero, I disagree with most leaks being the evaporator coil. Charge fittings over the years have been the big one. That’s why today the EPA make you remove them and braze the charge tube shut. But in the field, one comes across Schrader valves and line taps more than closed systems.
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In my experience with reach in units, it’s the U bends on the coils, rarely is it the access fittings or scharders leaking,
I’ve seen schrøders leak on walk ins, had them blow out but I’ve also seen pin holes in those evaporators.
I think I replaced 2 evaps in Delfield units last year and 2 TXV’s where the body was leaking.
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I agree that the coils get pin holes if the user stores acidic foods open. Especially tomato sauce or cut citrus. (or in a kiln drying Oak) But most evaporator leaks I’ve seen are from expansion and contraction in the support plates rubbing. Or out of balance fan vibration. As for TXV, it’s usually the charge corroding. Never seen a body leak.
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