![Amana PCC**C Скачать руководство пользователя страница 54](http://html1.mh-extra.com/html/amana/pcc-c/pcc-c_service-instructions-manual_2916128054.webp)
SERVICING
54
TEMPERATURE - PRESSURE (R-22)
Temp.
°F.
Gauge Pressure
(PSIG) Freon-22
Temp.
°F.
Gauge Pressure
(PSIG) Freon-22
-40
-38
-36
-34
0.61
1.42
2.27
3.15
60
62
64
65
102.5
106.3
110.2
114.2
-32
-30
-28
-26
4.07
5.02
6.01
7.03
68
70
72
74
118.3
122.5
126.8
131.2
-24
-22
-20
-18
8.09
9.18
10.31
11.48
76
78
80
82
135.7
140.5
145.0
149.5
-16
-14
-12
-10
12.61
13.94
15.24
16.59
84
86
88
90
154.7
159.8
164.9
170.1
-8
-6
-4
-2
17.99
19.44
20.94
22.49
92
94
96
96
175.4
180.9
186.5
192.1
0
2
4
6
24.09
25.73
27.44
29.21
100
102
104
106
197.9
203.8
209.9
216.0
8
10
12
14
31.04
32.93
34.88
36.89
108
110
112
114
222.3
228.7
235.2
241.9
16
18
20
22
38.96
41.09
43.28
45.53
116
118
120
122
248.7
255.6
262.6
269.7
24
26
28
30
47.85
50.24
52.70
55.23
124
126
128
130
276.9
284.1
291.4
298.8
32
34
36
38
57.83
60.51
63.27
66.11
132
134
136
136
306.3
314.0
321.9
329.9
40
42
44
46
69.02
71.99
75.04
78.18
140
142
144
146
338.0
346.3
355.0
364.3
48
50
52
54
81.40
84.70
88.10
91.5
158
150
152
154
374.1
384.3
392.3
401.3
56
58
95.1
98.8
156
158
160
411.3
421.8
433.3
S-109 CHECKING SUBCOOLING
Refrigerant liquid is considered subcooled whenever its tem-
perature is lower than the saturation temperature correspond-
ing to its pressure. The degree of subcooling equals the
degrees of temperature decrease below the saturation tem-
perature at the existing pressure.
1. Attach an accurate thermometer or preferably a thermo-
couple type temperature tester to the liquid line as it leaves
the condensing unit.
2. Install a high side pressure gauge on the high side ser-
vice valve at the front of the unit.
3. Record the gauge pressure and the temperature of the
line.
4. Convert the discharge pressure gauge reading to tem-
perature by finding the gauge reading in Temperature -
Pressure Chart and reading to the left, find the tempera-
ture in the °F. Column.
5. The difference between the thermometer reading and pres-
sure to temperature conversion is the amount of subcool-
ing.
EXAMPLE:
a. Discharge Pressure = 260
b. Corresponding Temp. °F. = 120°
c. Thermometer on Liquid line = 109°F.
To obtain the amount of subcooling subtract 109°F from 120°F.
The difference is 11° subcooling. The normal subcooling range
is 9° - 13° subcooling for heat pumps units, 14° - 18° for
cooling units and gas packs.
S-110 CHECKING EXPANSION VALVE OPERA-
TION
1. Remove the remote bulb of the expansion valve from the
suction line.
2. Start the system and cool the bulb in a container of ice
water, closing the valve. As you cool the bulb the suction
pressure should fall and the suction temperature will rise.
3. Next warm the bulb in your hand. As you warm the bulb
the suction pressure should rise and the suction tem-
perature will fall.
4. If a temperature or pressure change is noticed, the ex-
pansion valve is operating. If no change is noticed, the
valve is restricted, the power element is faulty, or the
equalizer tube is plugged.
5. Remove the charge, replace the valve and drier, evacuate
and recharge.