Hussmann rl5 freezer coil ice problem

Hey, so we keep getting callbacks to a couple of stores that have hussmann rl freezers and they are always iced up in the back of the coil like this. I’m just an apprentice have not seen a solution for why this is happening and we have to defrost these freezers every few months which I’m sure is wrong. Next time I’m dealing with one of these is there something I can check? Maybe a step by step check so I can be ahead of the game. I believe they are cool gas defrost. But some stores are hot gas defrost. Are they just bad design where they don’t drain properly? I noticed they drained, fairly slowly, but from the back of the coil. Thanks submitted by /u/Slothyota [link] [comments]

R290

3.5 ozs r290. Unit was only 4 months old. Never touched by a tech. Complete melt down. Happened at 7:30pm on a Monday. Restaurant is closed on Mondays. They found it Tuesday morning. submitted by /u/Alternative-Item-142 [link] [comments]

Swapping my first 3 phase motor, new motor has some extra wiring. Need to know where it goes.

Have my lines set apart, and what looks like 2 thermostat connections(thinner blue wire) from old motor. New motor has 9 leads, no labeled tstat leads. My background is reaidential hvac, this is my first refrigeration position nightshift maintenance at that so feel free to get technical but would appreciate some quick replies submitted by /u/ConsistentSmartAss [link] [comments]

Ice-O-Matic Freeze and Harvest Issues

M#: ICE1406FA5

S/N: 140б128011221

R404A

Customer complaint of malformed ice and water dripping into the bin.

• The machine was pretty moldy and calcified and the water filter was only allowing a couple of psi of water pressure through.
• The ice in the bin was a mixture of normal cubes and blocks of over frozen cubes that wouldn't drop when they were the correct size.
• Changed the filter and disassembled and thoroughly cleaned everything.
• Started the ice mode, hooked up gauges and watched.
• Suction line pressure was about 35 psi max. Head pressure was 225+ with an ambient of 68° ( I should have recorded the actual data )
• Right side froze and harvested normally in about 15 minutes ( timed it later after making changes )
• Left evap only freezing about 1/2 way up.
• Inlet and outlet temps of the left evap refrigerant lines were colder than the right evap.
• Tapped the TXV to see if the pressures would change. They did not.
• Added refrigerant at intervals and watched results. As refrigerant was added the line temps between the left and right evaps became closer to equal. At "final charge" the temps were averaging the same with the right side only slightly colder than the left.
• When I wrapped up for the night the left side was forming a full sheet with approx 1/8" bridge & the harvest assist was not breaking through the sheet, like when it was thin, but while the harvest time for the right side was normal, the left side took another 56 seconds to drop, dropping very slowly, and the purge ended right after the right side dropped causing water to fully run over the left side loosening ice and running into the bin.
• Hot gas temps felt the same at both evap inlet tubes when harvest first initiated. After the right side harvest assist cam shut off it's hot gas bypass valve the left evap inlet seemed a little cooler than it had been.
• Right now the pressures were left too high at 46 & 418
• I plan on returning tomorrow, dumping the charge and recharging by weight and collecting more data.
• I believe the TXV is the fault for the decreased performance of the left evap but I'm confused on why the harvest is taking so long on that side. ** I'll edit the post as I learn what I've left out.

submitted by /u/clmanaa
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[Serious] need help with surface coating

Hey everyone. I have a project I am working on that deals with refrigerant, specifically R123.

Essentially I have a plate sitting in the fluid, at various void fractions due to the temperature. I need to find a coating that is insulating for the plate and resistance to corrosion. Ideally it can be sprayed or painted on, rather than a film simply due to application process.

My background isn’t in this area so I’m not entirely sure where to start.

Any help or threads on where to start to find this material would be appreciated.

Thanks!

submitted by /u/Effie_the_jeffie
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Whoops

Fkn muppet submitted by /u/Hungry_kereru [link] [comments]

Average costs of Refrigeration Rack systems for Supermarkets and Grocery Store

As the title states, I am in the process of bidding out quotes for a rack system to operate our coolers and freezers both on the sales floor and in the back of house, and I understand each store is going to have a different quantity of compressors etc. Just trying to get a good baseline figure for the costs of the rack itself. I attempted to find some pricing online, however I couldn't find one site with any costs for rack systems. Thanks in advance.

submitted by /u/BrianHag1982
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Comm loss tips

Have a comm loss for munters using novar xia 44 and es1 controllers. Where to start? TIA

submitted by /u/Bluew0lf_42
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I found an old poster for a refrigerant I’ve never heard of. Any ideas?

submitted by /u/Mstrfkaratenfrendshp [link] [comments]

Fitted the P-trap….

We have had issues with a system not returning oil. Underground piping was pooling the oil in the suction pipe. Another technician was sent to site last week to reroute the piping and fit a P-trap. This is what I found on site this morning. Sometimes I don’t even know why I try… submitted by /u/XProximityX [link] [comments]