Page 13
13ACX SERIES
New or Replacement Line Set
Table 2. Refrigerant Line Set
Model Number (-xx*)
Valve Size Connections
Recommended Line Sets
Liquid Line
Suction Line
L15 Line Set Model
Line Set Length
Catalog Number
13ACX-018-230-17
13ACX-024-230-17
3/8” (10 mm)
5/8“ (16 mm)
L15-26-20
20 feet (6.1 m)
89J52
L15-26-25
25 feet (9.1 m)
89J53
L15-26-35
35 feet (12.2 m)
89J54
L15-26-50
50 feet (15.2 m)
89J55
13ACX-018-230-XX
13ACX-024-230-XX
13ACX-030-230-XX
13ACX-036-230-17
13ACX-042-230-17
3/8” (10 mm)
3/4” (19 mm)
L15-41-20
20 feet (6.1 m)
89J56
L15-41-30
30 feet (9.1 m)
89J57
L15-41-40
40 feet (12.2 m)
89J58
L15-41-50
50 feet (15.2 m)
89J59
13ACX-036-230-XX
13ACX-042-230-XX
13ACX-048-230-XX
13ACX-060-230-17
3/8” (10 mm)
7/8” (22 mm)
L15-65-30
30 feet (9.1 m)
89J60
L15-65-40
40 feet (12.2 m)
89J61
L15-65-50
50 feet (15.2 m)
89J62
13ACX-060-230-XX
3/8” (10 mm)
1-1/8” (29 mm) **
Field-fabricated
N/A
N/A
* Applicable to all minor revision numbers unless otherwise specified.
** Some applications may required a field-provided 1-1/8” to 7/8” adapter.
This section provides information on new installation or
replacement of existing line set. If a new or replacement
line set is not required, then proceed to
Brazing
Connections
on page 15.
NOTE - When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and
Fabrication Guidelines, CORP. 9351-L9, or contact
Lennox Technical Support Product Applications for
assistance.
If refrigerant lines are routed through a wall, seal and
isolate the opening so vibration is not transmitted to the
building. Pay close attention to line set isolation during
installation of any HVAC system. When properly isolated
from building structures (walls, ceilings. floors), the
refrigerant lines will not create unnecessary vibration and
subsequent sounds.
Also, consider the following when placing and installing a
high-efficiency air conditioner:
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (braze connections) to the indoor unit
coil (flare or braze connections). Use Lennox L15 (braze,
non-flare) series line set, or use field-fabricated refrigerant
lines as listed in Table 2.
IMPORTANT
Mineral oils are not compatible with HFC-410A
.
If oil
must be added, it must be a Polyol ester oil.
The compressor is charged with sufficient Polyol ester oil
for line set lengths up to 50 feet. Recommend adding oil to
system based on the amount of refrigerant charge in the
system. No need to add oil in system with 20 pounds of
refrigerant or less. For systems over 20 pounds - add one
ounce of every five pounds of refrigerant.
Recommended topping-off POE oils are Mobil EAL
ARCTIC 22 CC or ICI EMKARATE
RL32CF.
To obtain the correct information from Lennox, be sure to
communicate the following points:
Model (13ACX) and size of unit (e.g. -060).
Line set diameters for the unit being installed as listed
in table 2 and total length of installation.
Number of elbows and if there is a rise or drop of the
piping.
MATCHING WITH NEW OR EXISTING INDOOR COIL
AND LINE SET
The RFC1-metering line consisted of a small bore copper
line that ran from condenser to evaporator coil. Refrigerant
was metered into the evaporator by utilizing
temperature/pressure evaporation effects on refrigerant in
the small RFC line. The length and bore of the RFC line
corresponded to the size of cooling unit.
If the 13ACX is being used with either a new or existing
indoor coil which is equipped with a liquid line which served
as a metering device (RFCI), the liquid line must be
replaced prior to the installation of the 13ACX unit.
Typically a liquid line used to meter flow is 1/4” in diameter
and copper.
