Lennox Signature XP21 Series Installation And Service Procedure page 13

LINE SET
INSTALLATION
LINE SET ISOLATION THE FOLLOWING ILLUSTRATIONS ARE EXAM-
PLES 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 MATERIAL 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
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
IMPORTANT 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
wall
OUTSIDE WALL
WOOD BLOCK
BETWEEN STUDS
NOTE SIMILAR INSTALLATION PRACTICES SHOULD BE USED IF
LINE SET IS TO BE INSTALLED ON EXTERIOR OF OUTSIDE WALL.
WARNING
HFC−410A 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.
Page 13
INSTALLING
Refrigerant lines must not contact
VAPOR LINE
NON−CORROSIVE
METAL SLEEVE
WIRE TIE
SLEEVE
VAPOR LINE WRAPPED
WITH ARMAFLEX
OUTSIDE
WALL
LIQUID
LINE
PVC
CAULK
PIPE
FIBERGLASS
INSULATION
Polyol ester (POE) oils used with
LIQUID LINE
WIRE TIE
INSIDE WALL
STRAP
WOOD BLOCK
WIRE TIE
STRAP
XP21