Choice-vend

[Kevin C]

Hello

I have the big boy of home vending Choice Vend 299 back together but I have found some cooling problems. Today we ( my AC service manager) installed a valve, evacuated the system & recharged with Hot Shot 414B freon. When I left for the night we left the tempreture probes inside the machine so we could measure the tempreture at the vend area & up 3/4 of the way up the cabinet.

I think we are having airflow problems. When I opened the machine for cleaning & service the two existing evaporator fan motors were dead. I installed two new motors & I made the airflow go in a downward motion towards the  evaporator coil below. This makes the area were the soda's that are in ready to vend & the precool area the coldest but the upper area warmer.

Which way should the airflow across this coil? Should it be pushed down across the coil or pulled up through the coil?

I am at home posting this so I will post a picture tomarrow from work but the evaporator fan motors sit on a shelf & above this shelf is a sloped scoop that could be something to force the out away from the back wall

I hope this description of the situation will allow others to comment.

Kevin

[cvb141]

The airflow should be directed down across the evaporator on your choice vend and not drawn upward.

[johnieG]

It depends on the application, as my Cavalier C51 (as all C51 do) had the evap.' fan pulling the air up over the the coils (from the bottom, up in regards to cabinet position) on my old ChoiceVend CVC224/Pepsi had defective evap' fans (mine had three total) they all blew down (I could tell by the "dust" pattern on the back wall of the cabinet) But,Westinghouse WD (dry) chest coolers  pull the air "up" & over the  coils then out the top of the evaporator housing to flow "down" over the bottles, a fact they mention in the sales brochures too

[Kevin C]

J G

Your machine is an exact match as mine.  

Did the soda's in the upper part of your CV racks get cold?

So I guess I have it set up correctly.

Kevin

[cvb141]

Kevin,
The ones at the top of mine get cold enough, considering you drink the ones at the bottom first. The top ones will be cooled down the same by the time they work their way down.

[johnieG]

cvb141 is correct, on ChoiceVends, the bottom cans (or bottles) are chilled first, as they are to be vended first, then the upper stack,  as for the westinghouse chest coolers, the top bottles are served first, so they are chilled first...kinda logical....so keep that in mind when setting your themostat! (is you set it too cold, you'll freeze the bottom cans!) I use a remote reading electronic thermometer & place the probe at the point of "service" ie: where the customer will receive the product (sodas) in this case towards the bottom of the rack, on a glass-door vendor, I place it just above the middle shelf, in the vending opening...

[Pixel]

This question may seem a little silly, but to double check-

I've heard the term "precool" used in places. Is that what the process described above does?

[BrianB]

Pixel -
The pre-cool area of a soda pop machine is where soda that isn't actually in the vending mechanism sits. It's on site for quicker loading and it's already at or close to vending temperature depending on the pre-cool  location. So when the service man comes to refill an empty machine he already has cold bottles to put in first so that if a customer is waiting while he loads it, he will definitely get a nice cold bottle of whatever.

Some machine have the pre-cool area located right next to the Evaporator on the bottom of the liner and others have them at the top of the machine over the top of the vending mech/stack.