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Thread: multi level hussman deli case
01-17-2012, 08:23 PM #1
multi level hussman deli case
call came in as top shelf temping too high. other tech was out said it was because there was a register in ceiling above it and blowing heat down on it, recommended moving duct. I went there the case was at 50. found t stat set for 35 and open. turned down, cycled on.
did find that the fan motor closest to sensing bulb seized up causing that part of coil to get colder with no air movement over it causing stat to cycle off. Replaced motor and cleaned out returns and even pulled case apart to clean off the deflectors going up the center. cycled case came down to temp several times. had mgr put product in and would return in morning.
returned this morning and case at 37-38 but mgr says top tier is still temping at 41-48.
I did not get the case model, bad me, but it is very similar to the RIN3 case
Anything Im missing? any suggestions to get more air flow up to the top level.
BTW there are 4 motors @ 12 watts ea.
01-17-2012, 08:26 PM #2
sorry some info that was forgotten
R-22 case with clear site glass running at 44psi couldnt get liquid pressure due to leaking stem on receiver..... which is going to be replaced in the morning
01-17-2012, 08:47 PM #3
I have had some heater vent problems in cases but it seems it only affected old cases with missing honeycomb at the top. Island "coffin" cases seem really sensitive to heater air.
01-17-2012, 08:45 PM #4Professional Member
- Join Date
- Jun 2009
- Garland, TX
Can you somehow cover or close off the air duct that is blowing hot air onto the top shelf? And let them try it for another day? Just because the other tech missed the fan motor doesn't mean he's wrong about the air duct.
01-17-2012, 08:48 PM #5
he disconnected the duct. and i relocated it down 4 feet or so. nothing blowing down on the case at this time
01-17-2012, 08:56 PM #6
01-17-2012, 09:03 PM #7
She was reading off of the dial thermometers that the store puts in. Not the most accurate but that is what they use. I placed my thermometer on the top shelf near the " column" or center part where the air comes up. I was reading 31. but as you move forward it is temping at 41, which is where they are leaving their thermometer. the top shelf is also noticeably warmer than the middle and low shelf, but of course the surface area for cool air to escape is twice the size of the upper
01-17-2012, 09:04 PM #8
i have case set down to 28 or so on the stat to hold a mid 30 reading and i re stocked the case with product from the walk in at is at temp
01-17-2012, 09:13 PM #9
I usually run deli at about 32 which keeps me between their mandatory 35-41 range as long as they dont pack the shelves to tight.
01-17-2012, 09:17 PM #10
01-17-2012, 09:02 PM #11
Your case is too friggen warm
Set it down to 32 supply air or so.
While you're at it, make CERTAIN that the product stocked is cold enough (below 35F)
If it isn't you're BOTH wasting your time.
05-01-2012, 04:48 PM #12Professional Member*
- Join Date
- Apr 2001
01-17-2012, 09:16 PM #13
OK. Since you don't have a model number, tell me more about this case.
Describe it to me.
Multi-deck deli describes a LOT of different cases.
Is it a high-back case with 4 or 5 shelves? An island type case with 2-3 shelves?
I need some more details to help you.
While you're at it, try to remember the defrost schedule.
Did you check SH?