It's a 4 door Masterbilt cooler. Never seen ice like this before. My contractor thinks the coil has a restriction in it but I have my doubts
is this an airflow issue?
2sac
21 - 40 of 40 Posts
Joined
·
27,059 Posts
I can only guess at this point, I'm not the contractor. Been out of the field since 2012. I'm in facilities management. I'm confident his diagnosis is incorrect. Just wanted some other opinions. I don't want to spend money I don't have to and I want this fixed properly without chasing tails.
Joined
·
13,539 Posts
What's the MasterBilt model for this cooler? The current BMG series apparently have an air sensing thermostat and no defrost timer. If this unit is the same, I'd cut add a defrost clock before I spend a lot of time and money on it.
Joined
·
13,539 Posts
That's a blow through coil...the fans are pushers, blowing the air to the back of the case.
That blade looks like its drawing air through the coil while the blade to the right of it looks like it's pushing. Not that that's the case but didn't someone mention the air could be cavitating
Joined
·
13,539 Posts
The fan blade is concave on the coil side and pitched for CCWSE rotation. The airflow is definitely blowing through the coil.
![]()
Joined
·
50,203 Posts
Ok, I see now. What's up with that middle blade?
Joined
·
50,203 Posts
That left blade looks like it would have to spin CWLE to push.
Joined
·
13,539 Posts
All of them are the same.
Look at the different colors...ie, white grey and black. The white is looking though the opening to the white of the cabinet beyond. The grey is the fan blade itself and the square black in the center is the shaft sticking out.
The viewing angle of the center one clearly shows the concave curve of the blade.
Look at the different colors...ie, white grey and black. The white is looking though the opening to the white of the cabinet beyond. The grey is the fan blade itself and the square black in the center is the shaft sticking out.
The viewing angle of the center one clearly shows the concave curve of the blade.
Joined
·
50,201 Posts
If that's actually two coils, with two sets of metering devices and distributing tubes where the ice is building up, my vote would be under feeding for whatever reason. Bad/wrong metering devices, cold ambient / low head, low charge, etc.
Is this a new installation? What I'm really trying to ask is, did it used to work several months ago? If so, something changed. If not, is the equipment sized proper, could be an undersized condensing unit if it is a new install; running non stop but just cold where the refrigerant is feeding the coil.
Is this a new installation? What I'm really trying to ask is, did it used to work several months ago? If so, something changed. If not, is the equipment sized proper, could be an undersized condensing unit if it is a new install; running non stop but just cold where the refrigerant is feeding the coil.
Joined
·
27,059 Posts
TEM 430
Joined
·
13,539 Posts
The more I look at the pics, the more I'm seeing the result of lower airflows as you get further away from the fans...ie, uneven airflow cross the coil. Then you add repeated incomplete defrosts over a long period of time and you eventually have these ice formations.
Joined
·
50,201 Posts
Joined
·
50,201 Posts
Bottom right of the coil looks thicker..and gets thinner as it approaches the top.. and the rust formation deff makes you think it's an airflow issue..coldspot forming at farthest point of coil, no transfer of heat, colder ambient
Sent from my SM-G900V using Tapatalk
Sent from my SM-G900V using Tapatalk
Joined
·
677 Posts
Since the blades have the proper orientation, could the motors have been replaced with the wrong rotation?
21 - 40 of 40 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
