14
INSTALLATION
Interconnecting Tubing (cont�)
Suction Line Selection
Purpose of the suction line is to return superheated
vapor to the condensing unit from the evaporator�
Proper suction line sizing is important because it
plays an important role in returning oil to the com-
pressor to prevent potential damage to the bear-
ings, valves, and scroll sets� Also, an improperly
sized suction line can dramatically reduce capacity
and performance of the system� The procedure for
selecting the proper suction line is as follows:
• The total amount of suction line needed
• Add all of the equivalent lengths associated with
any fittings or accessories using the table on
previous page�
• Add the total length and fitting pressure drop.
This will equal your total equivalent length�
• Reference Table 2 to verify that the calculated
equivalent length falls within the compatibility
region of the chart�
• Verify Table 3 to verify the capacity difference is
compatible with the application�
Refrigerant Migration During
Off Cycle
Long line set applications can require a consider-
able amount of additional refrigerant� This addition-
al refrigerant needs to be managed throughout the
entire ambient operating envelope that the system
will go through during its life cycle. Off-Cycle mi-
gration is where excess refrigerant condenses and
migrates to the lowest part of the system� Exces-
sive build-up of refrigerant at the compressor will
result in poor reliability and noisy operation during
startup� This section demonstrates the required
accessories and unit configuration for different ap-
plications�
OUTDOOR UNIT LEVEL OR NEAR LEVEL TO INDOOR SECTION LINE SET
LIQUID LINE.
ST-A1219-01-01
IDEALLY, LINE SET SLOPES AWAY
FROM OUTDOOR. VERIFY
SUB-COOLING PRIOR TO
THROTTLEING DEVICE, INSULATED
REFERENCE TABLE 2 FOR
MAXIMUM LENGTH LIMITATIONS
Tubing
(-)A16
OD Model
Compressor
Name Plate Oil
Charge (oz)
(-)A1618AJ
(-)A1624AJ
(-)A1630AJ
(-)A1636AJ
(-)A1642AJ
(-)A1648AJ
(-)A1660AJ
(-)A1660BJ
(-)A1636AC
(-)A1642AC
(-)A1648AC
(-)A1660AC
ZP14K6E-PFV-130
ZP21K6E-PFV-130
ZP24K6E-PFV-130
ZP31K6E-PFV-130
ZP34K6E-PFV-130
ZP38K6E-PFV-130
ZP49K6E-PFV-130
ZP49K6E-PFV-130
ZP31K6E-TF5-130
ZP34K6E-TF5-130
ZP38K6E-TF5-130
ZP49K6E-TF5-130
21
21
25
25
42
42
42
42
42
42
42
42
Factory
Installed
CCH
N
N
N
N
N
N
Y
Y
N
N
Y
Y
(-)A14XXW
OD Model
Compressor
Name Plate Oil
Charge (oz)
(-)A1418WJ
(-)A1424WJ
(-)A1430WJ
(-)A1436WJ
(-)A1442WJ
(-)A1436WC
(-)A1442WC
ZP14K6E-PFV-130
ZP21K6E-PFV-130
ZP24K6E-PFV-130
ZP31K6E-PFV-130
ZP34K6E-PFV-130
ZP31K6E-TF5-130
ZP34K6E-TF5-130
21
21
25
25
42
25
42
Factory
Installed
CCH
N
N
N
N
N
N
N
