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SATURATED SUCTION PRESSURE
TEMPERATURE CHART
SUCTION PRESSURE
PSIG
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
85
90
95
100
110
120
130
140
150
160
170
The installation must include a "P" style trap that is located as
close as is practical to the evaporator coil. See Figure 12 for
details of a typical condensate line "P" trap.
NOTE: Units operating in high static pressure applications may
require a deeper field constructed "P" style trap than is shown
in Figure 12 to allow proper drainage and prevent condensate
overflow.
Air Handler
POSITIVE LIQUID
SEAL REQUIRED
AT TRAP
SATURATED SUCTION
TEMPERATURE ºF
R-22
R-410A
26
1
28
3
29
4
31
6
32
7
34
8
35
10
37
11
38
13
40
14
41
15
42
16
44
17
45
19
46
20
48
21
50
24
53
26
56
29
59
31
64
36
69
41
73
45
78
49
83
53
86
56
90
60
Drain
Connection
2" MIN.
2.75" MIN.
Figure 12
SATURATED LIQUID PRESSURE
TEMPERATURE CHART
LIQUID PRESSURE
PSIG
200
210
220
225
235
245
255
265
275
285
295
305
325
355
375
405
415
425
435
445
475
500
525
550
575
600
625
NOTE: Trapped lines are required by many local codes. In
the absence of any prevailing local codes, please refer to the
requirements listed in the Uniform Mechanical Building Code.
A drain trap in a draw-through application prevents air from being
drawn back through the drain line during fan operation thus
preventing condensate from draining, and if connected to a sewer
line to prevent sewer gases from being drawn into the airstream
during blower operation.
Use of a condensate removal pump is permitted when necessary.
This condensate pump should have provisions for shutting off
the control voltage should a blocked drain occur. A trap must be
installed between the unit and the condensate pump.
IMPORTANT NOTE: The evaporator coil is fabricated with
oils that may dissolve styrofoam and certain types of plastics.
Therefore, a removal pump or float switch must not contain any of
these materials.
Tip: Priming the "P" trap may avoid improper draining at the initial
installation and at the beginning of the cooling season.
9
SATURATED LIQUID
TEMPERATURE ºF
R-22
R-410A
101
70
105
73
108
76
110
78
113
80
116
83
119
85
121
88
124
90
127
92
130
95
133
97
137
101
144
108
148
112
155
118
157
119
n/a
121
n/a
123
n/a
125
n/a
130
n/a
134
n/a
138
n/a
142
n/a
145
n/a
149
n/a
152
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