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UNIT SIZE
AA
UNIT HEIGHT
21-15/16
23-15/16
25-15/16
Small
18
27-15/16
29-15/16
31-15/16
33-15/16
21-15/16
23-15/16
25-15/16
27-15/16
Medium
22-1/2
29-15/16
31-15/16
33-15/16
35-15/16
37-15/16
25-15/16
27-15/16
29-15/16
31-15/16
Large
30
33-15/16
35-15/16
37-15/16
39-15/16
TABLE 4—ESTIMATED PERCENTAGE OF NOMINAL COOLING-CAPACITY LOSSES*
UNIT
LONG-LINE
NOMINAL
VAPOR-LINE
SIZE
DIAMETER
(BTUH)
18,000
24,000
30,000
36,000
42,000
48,000
60,000
*The estimated percentage of cooling capacity that must be subtracted from the Detailed Cooling Capacities data specified in outdoor unit-presale literature for any given
indoor/outdoor combination.
†Vapor-line diameter that may be selected for a long-line application. If smaller vapor lines are selected but not specified within the table, large capacity losses will occur
and defrost capabilities will be reduced. If larger vapor lines are selected but not specified within the table, refrigerant oil return will be impaired due to velocity losses.
N/R—Not recommended due to excessive loss of capacity.
For reference only, the close cell insulation material specified for
accessory tubing kits is a compound of vinyl, neoprene, or nitrile
blends of these polymers. Performance requirements include
thermal range of 0° F to 200°F (-17.8° C to 93° C) and a maximum
thermal conductivity of 0.28.
NOTE: Special consideration must be given to isolating intercon-
necting tubing from building structure. Isolate tubing so that
vibration or noise is not transmitted into structure.
III. METERING DEVICE SIZING
The metering device for a long-line application must be flexible
enough to compensate for frictional losses due to long refrigerant
TABLE 3—WIND BAFFLE DIMENSIONS FOR CUBE UNITS (IN.)
A
B
19-7/8
13-3/4
21-7/8
13-3/4
23-7/8
13-3/4
25-7/8
13-3/4
27-7/8
13-3/4
29-7/8
13-3/4
31-7/8
13-3/4
19-7/8
18-5/16
21-7/8
18-5/16
23-7/8
18-5/16
25-7/8
18-5/16
27-7/8
18-5/16
29-7/8
18-5/16
31-7/8
18-5/16
33-7/8
18-5/16
35-7/8
18-5/16
23-7/8
25-3/4
25-7/8
25-3/4
27-7/8
25-3/4
29-7/8
25-3/4
31-7/8
25-3/4
33-7/8
25-3/4
35-7/8
25-3/4
37-7/8
25-3/4
50
(IN.)†
5/8
5
3/4
1
5/8
6
3/4
0
5/8
6
3/4
2
3/4
7
7/8
2
3/4
7
7/8
3
1-1/8
0
3/4
10
7/8
4
1-1/8
0
7/8
7
1-1/8
1
C
D
E
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
28-1/8
10-11/16
20-1/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
32-5/8
10-11/16
24-3/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
40-1/8
10-11/16
32-1/4
EQUIVALENT LINE LENGTH (FT)
75
100
7
9
3
4
9
13
1
1
8
10
3
4
10
14
4
6
10
13
4
6
0
1
14
18
6
7
0
1
9
11
2
2
lines and installed system design (indoor coil above or below
outdoor unit.) The piston or TXV provides such flexibility.
The piston should be changed for both indoor coil and outdoor heat
pump unit, depending on system configuration and line length.
Tables 6 and 7 provide necessary changes for a given application.
Use Tables 6 and 7 when selecting correct piston size. Outdoor-
unit presale literature must be consulted to determine metering
devices specified for standard applications. After determining
standard application piston size(s), refer to Tables 6 and 7 as they
relate to system design (outdoor unit above or below indoor unit)
per equivalent length of tubing.
—6—
F
G
H
11-11/16
3-13/16
19-13/16
11-11/16
3-13/16
21-13/16
11-11/16
3-13/16
23-13/16
11-11/16
3-13/16
25-13/16
11-11/16
3-13/16
27-13/16
11-11/16
3-13/16
29-13/16
11-11/16
3-13/16
31-13/16
16-3/16
8-1/4
19-13/16
16-3/16
8-1/4
21-13/16
16-3/16
8-1/4
23-13/16
16-3/16
8-1/4
25-13/16
16-3/16
8-1/4
27-13/16
16-3/16
8-1/4
29-13/16
16-3/16
8-1/4
31-13/16
16-3/16
8-1/4
33-13/16
16-3/16
8-1/4
35-13/16
23-11/16
15-13/16
23-13/16
23-11/16
15-13/16
25-13/16
23-11/16
15-13/16
27-13/16
23-11/16
15-13/16
29-13/16
23-11/16
15-13/16
31-13/16
23-11/16
15-13/16
33-13/16
23-11/16
15-13/16
35-13/16
23-11/16
15-13/16
37-13/16
125
150
12
12
5
5
16
19
2
3
13
15
5
6
17
21
8
10
17
20
7
8
1
2
22
N/R
9
11
1
2
14
16
3
3
J
17-13/16
19-13/16
21-13/16
23-13/16
25-13/16
27-13/16
29-13/16
17-13/16
19-13/16
21-13/16
23-13/16
25-13/16
27-13/16
29-13/16
31-13/16
33-13/16
21-13/16
23-13/16
25-13/16
27-13/16
29-13/16
31-13/16
33-13/16
35-13/16
175
14
7
22
4
17
7
N/R
11
23
10
2
N/R
13
2
19
4
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