Dry Rooms

[Joe Cool]

Hi everyone. This is my first post and new to this forum.
I have a dry curing room I was servicing and the room won't come down to temperature.
The room is 21 cubic meters and 3 - 5 deg. Set point
The data on evap coil is 1.548 Frig/h 1,8 kw @ -12.5/+45 deg c (6139 Btu)
2.236 Frig/h 2,6 kw @ -5/+40 deg c (8867 Btu)
Suction pipe is 1/2" and liquid line is 3/8" and about 45' long going back to a rack system
Tx valve - danfoss TES 5 with 0.5 orfice (I believe that is 3 ton) R404a
The room can not hold temp and superheated is high with tx valve wide open. I believe suction line is undersized but will this cause this problem and what else can it be.
Any help will be appreciated. Thank you

[mad fridgie]

Problem with liquid feed, suction line seems OK.

[passandscore]

What are your operating pressures? Superheat and subcooling temperatures?

[rknsv123]

u r used wrong suction line size
u can use 5/8 or 3/4 size suction line for that 45 feet length
change it

[tonyelian]

hi I see ur expansion is not correct and u need a little more kw

[r.bartlett]

http://www.danfoss.com/Middle_East/BusinessAreas/RefrigerationAndAirConditioning/Product+Selection+Tools+Details/Coolselector.htm