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13HPD SERIES
INSTALLING LINE SET
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 vertical runs
is illustrated in
figure 11.
Installation of a
transition from horizontal to
vertica
l is illustrated in figure 12.
Installation of
line set on horizontal runs
is
illustrated in figure 13.
PVC
PIPE
FIBERGLASS
INSULATION
CAULK
OUTSIDE
WALL
VAPOR LINE WRAPPED
WITH ARMAFLEX
LIQUID LINE
IMPORTANT!
REFRIGERANT
LINES MUST NOT
CONTACT
STRUCTURE.
OUTSIDE WALL
LIQUID LINE
VAPOR 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)
NOTE − Similar installation practices should be used if line
set is to be installed on exterior of outside wall.
STRAP LIQUID LINE
TO VAPOR LINE
METAL SLEEVE
AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
VAPOR LINE WRAPPED
IN ARMAFLEX
LIQUID
LINE
ANCHORED HEAVY
NYLON WIRE TIE
STRAP LIQUID LINE
TO VAPOR LINE
WALL
STUD
LIQUID LINE
METAL SLEEVE
VAPOR LINE − WRAPPED
IN ARMAFLEX
Figure 12. Refrigerant Line Set: Transition from
Vertical to Horizontal
METAL
SLEEVE
STRAPPING MATERIAL
(AROUND VAPOR LINE
ONLY)
TAPE OR
WIRE TIE
WIRE TIE
(AROUND
VAPOR 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 vapor line to the
joist or rafter at 8 feet
intervals then strap the
liquid line to the vapor line.
FLOOR JOIST OR
ROOF RAFTER
Figure 13. Refrigerant Line Set: Installing Horizontal
Runs
