Anyone else noticing a significant jump on evaporator pricing, and equipment in general?

My last few small builds (sub 5HP) all had evaporators priced at or above the condensing unit cost.

I'm trying to figure out how box with a coil and fans is costing more than a fancy box with a coil, scroll compressor, receiver, and controls. How the fuck is this thing worth $600 more than a condensing unit?

Can anyone explain to me how EEVs Work

Hello everyone

I'm maintenance chief at a supermarket chain in Brazil, and due to the hot climate we have a ton of refrigeration problems.

I had a crazy idea watching a YouTube video about making a aquarium PC, inside a glass container filled with mineral oil

What if I try to dip a condenser inside a huge mineral oil container? All the way to the top, making the fans move the oil arround and this way cooling it?

Mineral oil is non conductive and protect the system from corrosion, the container must be gigantic and probably stainless steel, maybe connected with a pool filtration system to avoid becoming too nasty over time

Probably this idea is totally unpractical due to the high costs, but the question is, you guys think this could work?

Got a store with two loops of these, 3 per loop, they seem to have sensors go out more often than I would have expected and just seem to have problems in general.

Any problems to look out for on them or are they just junk like I keep hearing?

any hoshizaki IM-200BAA experts ? i have this hoshizaki that seems to have all it refrigeration operation and mechanical operations to be good and within the proper values but it will not come out of the freeze cycle and initate harvest, i’ve checked the thermistor ohms and its also good. any other suggestions would be appreciated ! i have a feeling it might be the control board but it tells me the thermistor after 23 minutes running is at -6C (21F) but the freeze cycle is only 60% done. it runs for around 40 minutes but harvests for 5. any suggestions would be appreciated!!!

Update: Also just saw that it does not stop and continues to make ice and tested the bin control for continuity and it’s good. Again any help would be appreciated!

Hey everyone, so I was just cussed out by a group bakery department women and laughed at as I walked away for untying the rope they use to hold open the box freezer door open, told the manger of the store and she seemed uninterested so now I’m going to get the last laugh. the ticket for high temp (which is only due to the door being open(not this first time this had happened)) I’m going to keep open and order a door alarm, I’m pretty new to this field and have only ordered typical parts and when searching on United refrigerations website “door alarm” I’m not really finding anything. Remember I want the most annoying door alarm possible, on Amazon all the door alarms that I’m willing to go out of pocket for are Velcro or a weakish adhesive, I want something they can’t just rip off that I can screw down and makes the most annoying sound possible… this… is war…

For frozen food cases coming off a rack in a supermarket, do you think liquid line solenoids or suction stop are better for defrost and why?

Any Scotsman experts in here? I have a customer with a flaker M# F0822R (remote condenser). Original call last week was for the unit producing black/gray ice. Found the top bearing was toast but so was the auger and evaporator. Against my better judgment, we replaced the barrel, auger, breaker, water seal and all seemed good. New machines were 3-4 weeks out over here. Since then I’ve been getting called back for the machine making a loud whining noise but it is happening intermittently. Scotsman was telling me the issue was due to low suction pressure, I was running 18-22psi (404a) I weighed in the factory charge and got the same result. Yesterday they said headmaster. Well sure enough my discharge was below the 220# stamped on the valve and it was not bypassing whatsoever. I replaced the headmaster and still no change. Ambient temps are 20-30 degrees here and it seems like I still can’t keep the pressure up. At this point I’m not even sure I’m on the right track as far as the noise is concerned. I’m tired of throwing parts at this thing and thank you in advance if you have any insight!

Hi, so im still learning about refrigerant and HVAC-R. In class we just moved on past pressure enthalpy charting, but I am still very much in the weeds about it though. Like I understand the concepts, but in practice I struggle. My question is, for a normal field technician how often do yall actually have to graph out the enthalpy from readings?

Hey all, having a new issue with a manitowoc ice machine. Me and this machine have had spats previously but we had a nice long talk and I pretty much understand her now… or so I thought. I get a call Monday this week and come to check it out, and she’s sleep, I’m thinking okay this is another easy call I’ll hit hit the breaker watch it for a few and I’ll be good. I’m not good. So it seems every night the ice machine trips the breaker, and I can’t grasp what could be causing this. I’m pretty sure there’s nothing different in the cycle that should occur overnight, but throughout the day it’s fine and every morning the breaker is tripped. Any suggestions?

Hi fellas. Just wanted to take a poll of all of the members here. Obviously you all do your best to reclaim and keep refrigerant in our jobs from day to day. But how often would you say you're exposed to refrigerant vapors on a day to day basis? Just trace amounts or a fair bit on occasion? If you do come in contact with any refrigerant, are you worried about any health effects outside of immediate asphyxiation? Have an opportunity to get into the trade, just weighing the pros and cons of the health side of things and figured I'd ask people who do it every day to weigh in!

I replaced the evap in this R-290 prep table and everything went smooth. Good PT and vac decay. I charged it to factory spec and this is the running pressure (cabinet temp 71° w/18° Delta across the evap). Is this a normal suction pressure? Cap tube system. Honest question since I've only ever done resi/commercial comfort cool and haven't ever touched 290.

New compressor pressure tested and helped overnight vacuumed below 500 microns and held over 5 minutes 404A

Honestly, I feel like a run into some of the weirdest stuff out here. Wouldn't it have cost less to use a traditional metal housing kit?

Yesterday I was working on a fosters under-counter fridge. It has one of those LAE ribbon displays linked to a pcb, which has failed and wasn’t sending power the the compressor. I suggested bypassing that pcb and rewiring a new controller in, he looked over deadly serious and said, “no don’t bypass the pcb”. I asked why, he said “it might explode”. He wasn’t joking, he’d been observing me the whole time and was chipping in to make it seem like he understood the system completely. To be fair he was a nice guy if not a bit eccentric.

the drier shell somehow got punctured by ice and dumped a ton of liquid out of the rack. caught within 10 mins of getting a low receiver call luckily. I’m trying to figure out the best way to remove the 3/8 drier in thinking hacksaw blade? i really can’t get a cutter in there. the piping F’d me

1/2hp compressor for a vending machine. The compressor is drawing extra power and cycling rather quickly. I was referred to this relay box but am struggling to find a replacement for this part. What exactly am I looking for here? Furthermore, does the issue described even sound like the relay could be the problem?

I’m a total rookie btw…learning as I go. Willing to try anything before calling in a pro which I would do if the compressor housing itself is the issue and not the external parts which I can handle

Any advice is greatly appreciated

Hey! for hvac school we have to draw a isometric drawing of a walk-in chiller plus line sets, valves, hangers. anyone know a good site to use for the kind of project?

Got a carrier supra 760. That doesn't want to start. Fuel pump is good, starter brand new, glow plug work. Is the anything else I can check thanks for the help In advance

Pumped out a 5k lb system to repair valves and replace shaft seals.

Auminum mince all through the drain pan

I am looking to design and mfg custom evaporators for a new ice machine.  We are looking for design and manufacturing partners with experience in this space.  If you know of any individuals or companies experienced in this space, I appreciate any suggestions you can provide.

Hey guys, I was wondering if anyone's willing to share a copy of their check lists for PM agreements? I'm in the process of redesigning some of our company documents and doing some branding work.

Also, wanted to compare and contrast what types of things others are covering in their PMs.

We for example cover capacitors and contactor replacements during PMs , we don't charge labor or parts to swap those out.