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5-5
TM5-4120-375-14
Table 5-2.
NORMAL TEMPERATURE-PRESSURE RELATIONSHIPS
95 F (36 C) dry bulb return air to unit
.
Outdoor ambient
50F
temperature
10c
75F
24C
100F
11OF
38C
4.35C
125F
52C
Gauge Pressures
Suction (psig)
58-65
58-70
60-75
62-72
65-75
(Kg/Cm 2)
4.1-4.6
4.1-4.9
4.2-5.3
4.4-5.1
4.6-5.3
Discharge (psig)
120-155
170-205
250-290
300-390
3’70-410
(Kg/Cm 2)
8.4-10.9
11 .9-14.4
17.6-20.4
21 .1-2.4
26.0-28.8
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NOTE
Dry bulb temperatures are measured with an ordinary thermometer
If pressures are too low, check for leaks and add refrigerant:
if too high, bleed off refrigerant until pressure is normal.
Step 3.
Pressure reset button on pressure switch.
Test pressure switch in accordance with
paragraphs 5-19 thru 5-24.
CAUTION
Do not exceed 12-second operating time, or vacuum may be
formed in suction side of refrigeration system and damage
compressor.
Bleed off refrigerant slowly, over a period of
about one hour, to prevent oil being blown out of system,
then replace faulty pressure cutout switch and recharge system.
WARNING
Be careful when working with high voltage. Failure to comply can
result in serious injury or death.
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