31369765EN-07
16
Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.5 Pressure test
Ts'=cold room air inlet temperature.
Te=evaporating temperature. It is related to the
refrigerant pressure on the unit cooler outlet.
Trs=refrigerant superheat temperature, on suc-
tion line near thermostatic valve bulb.
(Trs-Te)=superheat
(Trs-Te) ≤ 0.7 x (Ts'-Te)
Keep the superheat as low as possible to obtain
maximum unit cooler performance.
The thermostatic valve fitted must be correctly
sized for the installation conditions and adjusted
for correct system operation.
Connect the drain tubing (F) to the drain connec-
tion (G).
All pipework should be adequately attached to
the walls/ceilings of the cold room and not only
to the cooler itself.
6.6 Drain line
Check all drain lines and drip trays to ensure that no improper material such as, e.g., packaging
material blocks the drain.
Tighten drain connection by hand only.
The drain line diameter must be at least the size
of the driptray drain diameter and should be laid
with an adequate slope. For room temperatures
below 0 °C drain line insulation and defrosting
are required.
A syphon must be installed on the drain line, out-
side the cold room.
L
H
I
G
F
60°
Te
Ts'
Trs
≥ 1.5 m
