Pressure Indications; Evaporator Temperature / Sealed System Low-Side Pressure Correltion - Sub-Zero 700TC-3 Service Manual

Integrated
Integrated
If low-side pressure is
NORMAL
LOW
LOW
HIGH
HIGH
EVAPORATOR TEMPERATURE / SEALED SYSTEM LOW-SIDE PRESSURE CORRELATION
NOTE: The temperature/pressure table at
right is for reference only. A unit's tempera-
ture/pressure correlation may differ from
those listed due to: variations in evaporator
thermistor location, set-points, where the
sealed system is in the refrigeration cycle,
etc.
If a unit is experiencing temperature prob-
lems, it is recommended that you follow the
"Pointers" in the first column of the General
Troubleshooting Guide. 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 sys-
tem.
3
3 Series
Series
(700- T ALL)
(700- T ALL)

PRESSURE INDICATIONS

& high-side pressure is
NORMAL
LOW
HIGH
LOW
HIGH
8-21
Troubleshooting Guides
possible problem is
MECHANICAL
(see General Troubleshooting Guide)
RESTRICTION
INEFFICIENT COMPRESSOR
OVER CHARGE
Temperature
-30°F / -34°C 10" Vac / -.69 Bar
-25°F / -32°C 7" Vac / -.48 Bar
-20°F / -29°C 4" Vac / -.28 Bar
-15°F / -26°C 0" Vac / 0 Bar
-10°F / -23°C 2 Psi / .14 Bar
-5°F / -21°C 4 Psi / .28 Bar
0°F / -18°C 7 Psi / .48 Bar
5°F / -15°C 9 Psi / .62 Bar
10°F / -12°C 12 Psi / .83 Bar
15°F / -9°C 15 Psi / 1.03 Bar
20°F / -7°C 18 Psi / 1.24 Bar
25°F / -4°C 22 Psi / 1.51 Bar
30°F / -1°C 26 Psi / 1.79 Bar
35°F / 2°C
30 Psi / 2.07 Bar
40°F / 4°C 35 Psi / 2.41 Bar
45°F / 7°C 40 Psi / 2.76 Bar
50°F / 10°C 45 Psi / 3.10 Bar
55°F / 13°C
51 Psi / 3.52 Bar
60°F / 16°C 57 Psi / 3.93 Bar
65°F / 18°C 64 Psi / 4.41 Bar
70°F / 21°C 71 Psi / 4.90 Bar
75°F / 24°C
78 Psi / 5.38 Bar
#3758412 - Revision B - December, 2006
LEAK
Pressure