multi level hussman deli case

[therock]

There's not a grocer born that doesn't overload a produce case!!!!
You can't stop them and health (temperature) inspectors know that
They stack it up for impulse buying almost 2 feet out of the air flow
then all the cold air falls on the floor and none makes it to the top shelf
My IR thermo shows 59 to 60 at times on produce
Give them a picture of max load lines and they smile at you and then
as soon as you leave they overload the case so they won't get fired
Some would rather stock a non refrig product on the top shelf so they
can continue overloading the lower shelves and dump horsepower on the
floor but it makes a good cold display for beer on sale on the floor LOL

If one fan motor has failed they all have to be replaced as they have
the same hours history on the bearings and you can't see lowered rpms
and don't allow any bent blades which do cause lower rpms = lower cfms

If you unloaded and power washed all possible air flow restriction areas
replace all fan motors, check for correct blades and balance the blades
If the motors are replaced I increase wattage size to at least 9w if smaller
than (4 or 6watt) that, check superheat and coil temp defrost clock and
mfg settings, check the R-22 compressor for blow by caused by case
overloading for 5 years then remark case load limit lines and call it a day

[beb]

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.

X2 Ive run into this often at same store after health dept visit.

[jpsmith1cm]

If the motors are replaced I increase wattage size to at least 9w if smaller
than (4 or 6watt) that,

This is almost NEVER a good idea.

There is a proper position for a fan blade within the plenum, and installing a larger (or smaller) sized motor can and WILL change that postition, altering airflow for the worst!

Replace the motor with the proper sized one.

[jaybee]

Here's the case specs for the RIN3:

RIN3 Technical Data Sheet

If the case in question is a different model, go to their search page here and enter the case model you have.

The RIN3 calls for a 20ºF evap temp and 27ºF discharge air with 4 defrosts/day, time terminated at 20 minutes.

Verify your store conditions are at or below 75ºFdb/55%RH.

Also, the shelf sizing and load limits are critical on these cases.

THANKS

[crackertech]

There's not a grocer born that doesn't overload a produce case!!!!
You can't stop them and health (temperature) inspectors know that
They stack it up for impulse buying almost 2 feet out of the air flow
then all the cold air falls on the floor and none makes it to the top shelf
My IR thermo shows 59 to 60 at times on produce
Give them a picture of max load lines and they smile at you and then
as soon as you leave they overload the case so they won't get fired
Some would rather stock a non refrig product on the top shelf so they
can continue overloading the lower shelves and dump horsepower on the
floor but it makes a good cold display for beer on sale on the floor LOL

If one fan motor has failed they all have to be replaced as they have
the same hours history on the bearings and you can't see lowered rpms
and don't allow any bent blades which do cause lower rpms = lower cfms

If you unloaded and power washed all possible air flow restriction areas
replace all fan motors, check for correct blades and balance the blades
If the motors are replaced I increase wattage size to at least 9w if smaller
than (4 or 6watt) that, check superheat and coil temp defrost clock and
mfg settings, check the R-22 compressor for blow by caused by case
overloading for 5 years then remark case load limit lines and call it a day

Really!!! I guess you don't work on a contract Market.

[crackertech]

This is almost NEVER a good idea.

There is a proper position for a fan blade within the plenum, and installing a larger (or smaller) sized motor can and WILL change that postition, altering airflow for the worst!

Replace the motor with the proper sized one.

X2

[jpsmith1cm]

Really!!! I guess you don't work on a contract Market.

Some of the new Barker cases, I'm doing them all at once.

The whole case has to be pulled, you've got to pull the plenum out just to get at the fans.

Yep, a couple of cheap 9watts make good sense in that case

[Phase Loss]

This is almost NEVER a good idea.

There is a proper position for a fan blade within the plenum, and installing a larger (or smaller) sized motor can and WILL change that postition, altering airflow for the worst!

Replace the motor with the proper sized one.

X3

Look here page 2 & 3. Pay attention to wattage and motor dimension.

http://www.aosmithmotors.com/uploade...Web.pdf?n=5332

Going higher in wattage will use a thicker motor and place the blade above the plenum. Going lower in wattage will use a thinner motor and place the blade below the plenum.

[therock]

This is almost NEVER a good idea.

There is a proper position for a fan blade within the plenum, and installing a larger (or smaller) sized motor can and WILL change that postition, altering airflow for the worst!

Replace the motor with the proper sized one.

Yes JP and it would be a very bad idea for me to disagree with another fellow
CM that has all those rounds on his profile page
By all means always take my 45 years of information with a grain of salt as I
don't mean to criticize others and there are how many grains in those rounds?

I am so thankful for this forum as it often shows many of us that some of the
tactics we have used in the past that worked actually turned out to be
incorrect

Always go by mfg specs first then if that doesn't work go right to the source
and ask the mfg application engineer
They will help you as they are proud of their product and their reputation

[Fridge Repairer]

Check your superheat too make sure your feeding the evaporator coil properly.

[ruuufuhbock]

I'm new to markets but in my short experience I would have to agree that this case probably needs to stripped down and cleaned, and possibly even tape off some of the lower louvers to forc
e.the air north. It's very rinky.dink.but it works.