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Table 5
10ACC Subcooling Values
(Fixed Orifice Systems Only)
OUTDOOR
LIQUID SUBCOOLING [+ 1_F (.6_C)]
TEMP
TEMP.
_F (_C)
18
24
65
14
10
(18)
(8)
(5.6)
70
13
9
(21)
(7)
(5)
75
14
8
(24)
(8)
(4.5)
80
13
7
(27)
(7)
(3.9)
85
13
6
(29)
(7)
(3.3)
90
12
5
(32)
(6.7)
(2.8)
95
11
4
(35)
(6)
(2.2)
100
11
4
(38)
(6)
(2.2)
105
10
3
(41)
(5.6)
(1.7)
110
9
3
(43)
(5)
(1.7)
115
8
2
(45)
(4.5)
(1.1)
Charging Using Normal Operating Pressures
and the Approach Method
TXV Systems – Outdoor Temp. > 65_F (18_C)
The following procedure is intended as a general guide and
is for use on expansion valve systems only. For best results,
indoor temperature should be 70°F (21°C) to 80°F (26°C).
Monitor system pressures while charging.
1 − Record outdoor ambient temperature using a digital
thermometer.
2 − Attach high pressure gauge set and operate unit for
several minutes to allow system pressures to stabilize.
3 − Compare stabilized pressures with those provided in
table 7, Normal Operating Pressures." Minor varia-
tions in these pressures may be expected due to differ-
ences in installations. Significant differences could
30
36
42
48
16
17
17
15
(9)
(9.5)
(9.5)
(8.3)
15
17
17
14
(8.3)
(9.5)
(9.5)
(8)
15
16
16
13
(8.3)
(9)
(9)
(7)
15
15
15
13
(8.3)
(8.3)
(8.3)
(7)
14
14
14
12
(8)
(8)
(8)
(6.7)
14
14
14
12
(8)
(8)
(8)
(6.7)
13
12
14
12
(7)
(6.7)
(8)
(6.7)
13
11
13
11
(7)
(6)
(7)
(6)
12
10
12
10
(6.7)
(5.6)
(6.7)
(5.6)
11
9
11
9
(6)
(5)
(6)
(5)
11
8
11
8
(6)
(4.5)
(6)
(4.5)
mean that the system is not properly charged or that a
problem exists with some component in the system.
Pressures higher than those listed indicate that the
system is overcharged. Pressures lower than those
listed indicate that the system is undercharged. Verify
60
adjusted charge using the approach method.
14
4 − Use the same digital thermometer you used to check
(8)
the outdoor ambient temperature to check the liquid
15
(8.3)
line temperature. The difference between the ambient
15
and liquid temperatures should match values given in
(8.3)
table 6. Loss of charge results in low capacity and effi-
14
ciency.
(8)
14
5 − If the values don't agree with the those in table 6, add
(8)
refrigerant to lower the approach temperature, or re-
13
cover refrigerant from the system to increase the ap-
(7)
proach temperature.
13
(7)
12
(6.7)
12
Model No.
(6.7)
11
10ACC−018
(6)
10ACC−024
10
(5.6)
10ACC−030
10ACC−036
10ACC−042
10ACC−048
10ACC−060
NOTE − For best results, use the same digital thermometer to check both
outdoor ambient and liquid temperatures.
Use table 7 to perform maintenance checks. Table 7
is not a procedure for charging the system. Minor
variations in these pressures may be due to differ-
ences in installations. Significant deviations could
mean that the system is not properly charged or that
a problem exists with some component in the system.
See table 7.
Page 14
Table 6
Approach Method
Approach Temperature
Liquid Line − Outdoor Ambient
9 (5)
18 (10)
22 (12)
11 (6)
13 (7)
8 (4.5)
13 (7)
IMPORTANT
_F (_C)
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