Sub-Zero UC-24 series Service Manual page 50

Troubleshooting Guides
EVAPORATOR TEMPERATURE / SEALED SYSTEM LOW-SIDE PRESSURE CORRELATION
NOTE: The temperature/pressure table at right is for refer-
ence only. A unit's temperature/pressure correlation may
differ from those listed due to: variations in evaporator ther-
mistor location, set-points, where the sealed system is in
the refrigeration cycle, ambient temperature, etc.
If a unit is experiencing temperature problems, it is recom-
mended that you reference the General Troubleshooting
Guide before accessing the sealed system. After all
mechanical and electrical components have been ruled
out, sealed system pressures can be checked by applying
solder-on process valves and referencing the preceding
page. Do NOT use bolt-on process valves as they are
prone to leak.
This table should only be used as a last quick check before
entering the sealed system.
#7003933 - Revision B - November, 2007
Under Counter (UC-24) Series
Temperature
-30°F (-34°C)
-25°F (-32°C)
-20°F (-29°C)
-15°F (-26°C)
-10°F (-23°C)
-5°F (-21°C)
0°F (-18°C)
5°F (-15°C)
10°F (-12°C)
15°F (-9°C)
20°F (-7°C)
25°F (-4°C)
30°F (-1°C)
35°F (2°C)
40°F (4°C)
45°F (7°C)
50°F (10°C)
55°F (13°C)
60°F (16°C)
65°F (18°C)
70°F (21°C)
75°F (24°C)
8-16
Pressure
10" Vac
7" Vac
4" Vac
0" Vac
2 Psi
4 Psi
7 Psi
9 Psi
12 Psi
15 Psi
18 Psi
22 Psi
26 Psi
30 Psi
35 Psi
40 Psi
45 Psi
51 Psi
57 Psi
64 Psi
71 Psi
78 Psi