Lennox XC21 Series Unit Information page 13

LINE SET
INSTALLATION
Line Set Isolation The following illustrations are
examples of proper refrigerant line set isolation:
REFRIGERANT LINE SET
FROM VERTICAL TO HORIZONTAL
ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
NON−CORROSIVE
METAL SLEEVE
REFRIGERANT LINE SET
HORIZONTAL RUNS
To hang line set from joist or rafter, use either metal strapping materi-
al or anchored heavy nylon wire ties.
8 FEET (2.43 METERS)
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
FLOOR JOIST OR
ROOF RAFTER
NON−CORROSIVE
METAL SLEEVE
TAPE OR
WIRE TIE
FLOOR JOIST OR
ROOF RAFTER
IMPORTANT
TRANSITION
AUTOMOTIVE
MUFFLER-TYPE HANGER
STRAP LIQUID LINE TO
VAPOR LINE
LIQUID LINE
VAPOR LINE − WRAPPED
IN ARMAFLEX
INSTALLING
WIRE TIE (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIE
8 FEET (2.43 METERS)
STRAP THE VAPOR LINE TO THE
JOIST OR RAFTER AT 8 FEET (2.43
METERS) INTERVALS THEN STRAP
THE LIQUID LINE TO THE VAPOR LINE.
Figure 7. Line Set Installation
Page 13
Refrigerant lines must not contact structure.
REFRIGERANT LINE SET
VERTICAL RUNS (NEW CONSTRUCTION SHOWN)
NOTE Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or
greater than 20 psig.
IMPORTANT Refrigerant lines must not contact wall
OUTSIDE WALL
WOOD BLOCK
BETWEEN STUDS
VAPOR LINE WRAPPED
WITH ARMAFLEX
OUTSIDE
WALL
PVC
PIPE
FIBERGLASS
INSULATION
NOTE Similar installation practices should be used if line set
is to be installed on exterior of outside wall.
WARNING Polyol ester (POE) oils used
refrigerant absorb moisture very quickly. It is very important that the
refrigerant system be kept closed as much as possible. DO NOT
remove line set caps or service valve stub caps until you are ready
to make connections.
INSTALLING
LIQUID LINE
VAPOR LINE
WIRE TIE
INSIDE WALL
STRAP
NON−CORROSIVE
METAL SLEEVE
WIRE TIE
WOOD BLOCK
WIRE TIE
STRAP
SLEEVE
LIQUID
LINE
CAULK
with
HFC−410A
XC21