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13ACD SERIES
LINE SET ISOLATION
This reference illustrates procedures, which ensure proper
refrigerant line set isolation:
Line set for heat pump applications can not be installed
underground. For more information see the Lennox
Refrigerant Piping Design and Fabrication Guidelines, or
contact Lennox Technical Support Product Applications
for assistance.
Installation of line set on horizontal runs is
illustrated in figure 10.
Installation of line set on vertical runs is illustrated in
figure 11.
Installation of a transition from horizontal to
vertical is illustrated in figure 12.
METAL
SLEEVE
STRAPPING MATERIAL
(AROUND SUCTION
LINE ONLY)
TAPE OR
WIRE TIE
WIRE TIE
(AROUND
SUCTION LINE
ONLY)
FLOOR JOIST OR
ROOF RAFTER
TAPE OR
WIRE TIE
TO HANG LINE SET FROM JOIST OR
RAFTER, USE EITHER METAL STRAPPING
MATERIAL OR ANCHORED HEAVY NYLON
WIRE TIES.
8 FEET
8 FEET
STRAP THE SUCTION LINE TO
THE JOIST OR RAFTER AT 8 FEET
INTERVALS THEN STRAP THE
LIQUID LINE TO THE SUCTION
LINE.
FLOOR JOIST OR
ROOF RAFTER
Figure 10. Refrigerant Line Set: Installing Horizontal
Runs
NOTE − Similar installation
practices should be used if
line set is to be installed on
exterior of outside wall.
PVC
PIPE
FIBERGLASS
INSULATION
CAULK
OUTSIDE
WALL
SUCTION LINE WRAPPED
WITH ARMAFLEX
LIQUID LINE
IMPORTANT!
REFRIGERANT
LINES MUST NOT
CONTACT
STRUCTURE.
OUTSIDE WALL
LIQUID LINE
SUCTION LINE
IMPORTANT - REFRIGERANT LINES
MUST NOT CONTACT WALL.
WOOD BLOCK
BETWEEN STUDS
STRAP
SLEEVE
WOOD BLOCK
STRAP
SLEEVE
WIRE TIE
WIRE TIE
WIRE TIE
INSIDE WALL
Figure 11. Refrigerant Line Set: Installing Vertical
Runs (New Construction Shown)
STRAP LIQUID LINE TO
SUCTION LINE
METAL SLEEVE
AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
SUCTION LINE − WRAPPED IN
ARMAFLEX
LIQUID LINE
ANCHORED HEAVY
NYLON WIRE TIE
STRAP LIQUID LINE
TO SUCTION LINE
WALL
STUD
LIQUID LINE
METAL SLEEVE
SUCTION LINE − WRAPPED IN
ARMAFLEX
Figure 12. Refrigerant Line Set: Transition from Vertical to Horizontal
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