506 01 2303 01
9
Specifications are subject to change without notice.
Table 2 – CHS072--121 Piping Recommendations (Single-Circuit Unit)
R-410A
Equivalent Length
Ft
0-38
38-75
75-113
113-150
Model
Nominal Capacity
Length Linear
Length Equiiv
0-25
0-38
25-50
38-75
50-75
75-113
75-100
113-115
CHS072
Liquid Line
3
/
8
3
/
8
3
/
8
1
/
2
3
/
8
1
/
2
Max Lift
Cool
Heat
25
25
50
50
48
46
75
60
39
31
100
60
Vapor Line
7
/
8
7
/
8
1-
1
/
8
1-
1
/
8
Charge (lbs)
17.8
18.8
20.3
22.6
21.4
24.5
CHS091
Liquid Line
1
/
2
1
/
2
1
/
2
1
/
2
Max Lift
Cool
Heat
25
25
50
50
75
60
100
60
Vapor Line
7
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
Charge (lbs)
20.9
23.0
24.9
26.8
CHS121
Liquid Line
1
/
2
1
/
2
1
/
2
1
/
2
5
/
8
Max Lift
Cool
Heat
25
25
50
50
75
60
85
60
100
60
Vapor Line
7
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
3
/
8
Charge (lbs)
26.8
28.8
30.7
33.4
37.2
Legend:
Length Equiv
Equivalent tubing length, including effects of refrigeration specialties devices
Liquid Line
Tubing size, inches OD.
Max Lift
Cooling
Heating
Maximum liquid lift at maximum permitted liquid line pressure drop
S
Indoor unit ABOVE outdoor unit
S
Indoor unit BELOW outdoor unit
Vapor Line
Tube size, inches OD
Charge
Charge Quantity, lbs. Calculated for both liquid line sizes (where applicable), but only with large
suction line size (where applicable)
NOTE:
For applications with linear length greater than 100 ft (30.5 m), contact your local ICP
representative.
Check Vertical Separation —
If there is any vertical separation between the indoor and
outdoor units, check to ensure that the separation is within
allowable limits. Relocate equipment if necessary.
Provide Safety Relief
—
If local codes dictate an additional safety relief device,
purchase locally and install locally. Installation will
require the recovery of the factory shipping charge before
the factory tubing can be cut and the supplemental relief
device is installed.
Refrigerant Line Sizing —
Consider the length of the piping required between the
outdoor and indoor units. The maximum allowable line
length is 100 ft (30.5 m). See Table 2. Refrigerant vapor
piping should be insulated.
Risers in Heat Pump Piping Systems —
Elevation differences between the outdoor unit and the
indoor unit in heat pump systems will create two riser line
conditions – one in the liquid line in one mode and one in
the vapor line in the opposite mode. See the following
table to identify which lines are risers in this installation.
Mode
CHS Unit
BELOW
ID Unit
CHS Unit
ABOVE
ID Unit
Riser in
Riser in
Cooling
Liquid
Vapor
(Suction Gas)
Heating
Vapor
(Discharge Gas)
Liquid
Liquid Line Riser:
Refer to Pipe Sizing Table, Table 2;
observe Max Lift limits for liquid line according to unit
mode, equivalent line length and pipe size.
Vapor Line Riser:
Refer to Table 3 for maximum pipe
size in single pipe vapor risers. All pipe size
recommendations in Pipe Sizing Table, Table 2, satisfy
these maximum vapor line sizes. If this installation is
re--using existing piping, check the vapor line sizes
against these maximum values; replace riser sections with
these pipe sizes if necessary.
