Comfort PRL-series, Installation Instructions Manual

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7.3 Outdoor Unit Installed Above or Below Indoor Coil
Use the following guidelines when installing the unit:
1. Expansion Valve Coil:
a. The vertical separation cannot exceed the value in Tables 4, 5 and 6.
b. No changes are required for expansion valve coils.
2. It is recommended to use the smallest liquid line size permitted to minimize the
system charge.
3. Tables 4, 5 and 6 may be used for sizing horizontal runs.
7.4 Tubing Installation
Observe the following when installing correctly sized type “L” refrigerant tubing
between the condensing unit and evaporator coil:
• If a portion of the liquid line passes through a hot area where liquid refrigerant
can be heated to form vapor, insulating the liquid line is required.
TABLE 4
LIQUID LINE SIZING – (-)PRL HEAT PUMPS
13
2-Stage
R-410A
System
Capacity
Model
Line Size
Connection
Size (Inch
I.D.) [mm]
Line Size
(Inch O.D.)
[mm]
Total Equivalent Length - Feet [m]
Maximum Vertical Separation - Feet [m]
1/4” [6.35]* 25 [7.62] N/A N/A N/A N/A N/A
-024 3/8” [9.53] 5/16” [7.93] 25 [7.62] 36 [10.97] 33 [10.06] 28 [8.53] 22 [6.71] 16 [4.88]
3/8” [9.52] 25 [7.62] 41 [12.50] 40 [12.19] 39 [11.89] 37 [11.28] 36 [10.97]
5/16” [7.93]* 25 [7.62] 22 [6.71] 9 [2.74] N/A N/A N/A
-036 3/8” [9.53] 3/8” [9.52] 25 [7.62] 39 [11.89] 34 [10.36] 30 [9.14] 25 [7.62] 21 [6.40]
1/2” [12.70] 25 [7.62] 46 [14.02] 45 [13.72] 44 [13.41] 43 [13.11] 42 [12.80]
5/16” [7.93]* 25 [7.62] 17 [5.18] N/A N/A N/A N/A
-048 3/8” [9.53] 3/8” [9.52] 25 [7.62] 47 [14.33] 39 [11.89] 31 [9.45] 23 [7.01] 16 [4.88]
1/2” [12.70] 25 [7.62] 50 [15.24] 58 [17.68] 56 [17.07] 54 [16.46] 53 [16.15]
3/8” [9.52]* 25 [7.62] 18 [5.49] 11 [3.35] N/A N/A N/A
-060 3/8” [9.53]
1/2” [12.70] 25 [7.62] 29 [8.84] 27 [8.23] 26 [7.93] 25 [7.62] 23 [7.01]
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]
Liquid Line Size
Outdoor unit Above or Below Indoor Coil
(Heat Pump Only)
NOTES:
N/A - Application Not Recommended
*Standard Line Size
TABLE 5
SUCTION LINE SIZE – OUTDOOR UNIT ABOVE INDOOR COIL – (-)PRL HEAT PUMPS
2-Stage
R-410A
System
Capacity
Model
Line Size
Connection
Size (Inch
I.D.) [mm]
Line Size
(Inch O.D.)
[mm]
Outdoor Unit ABOVE Indoor Coil (Heat Pumps)
Total Equivalent Length - Feet [m]
5/8” [15.88] Same as Liquid Line Size Table
-024 3/4” [19.05] 3/4” [19.05]* NA
7/8” [22.23] NA
5/8” [15.88] Same as Liquid Line Size Table
-036 3/4” [19.05] 3/4” [19.05]* NA
7/8” [22.23] NA
5/8” [15.88] Same as Liquid Line Size Table
-048 7/8” [22.22] 3/4” [19.05] Same as Liquid Line Size Table
7/8” [22.23]* Same as Liquid Line Size Table
3/4” [19.05] Same as Liquid Line Size Table
-060 7/8” [22.22] 7/8” [22.23]* Same as Liquid Line Size Table
1-1/8” [28.58] NA
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [38.1] 150 [45.72]
Suction Line Size
NOTES: Using suction line larger than shown in chart will result in poor oil return and is not recommended.
N/A = Application Not Recommended
*Standard Line Size