508228-01 Issue 2136 Page 17 of 41
Refrigeration Piping
• Use only refrigerant grade copper tubes.
• Split systems may be installed with up to 50 feet of
line set (no more than 20 feet vertical) without special
consideration (see long line set guidelines).
• Ensure that vapor and liquid tube diameters are
appropriate to capacity of unit.
• Run refrigerant tubes as directly as possible by
avoiding unnecessary turns and bends.
• When passing refrigerant tubes through the wall, seal
opening with RTV or other silicon-based caulk.
• Avoid direct tubing contact with water pipes, duct work,
oor joists, wall studs, oors, walls, and any structure.
• Do not suspend refrigerant tubing from joists and
studs with a rigid wire or strap that comes in direct
contact with tubing.
• Ensure that tubing insulation is pliable and completely
surrounds vapor tube.
It is important that no tubing be cut or seals broken until you
are ready to actually make connections to the evaporator
and to the condenser section. DO NOT remove rubber
plugs or copper caps from the tube ends until ready to
make connections at evaporator and condenser. Under no
circumstances leave the lines open to the atmosphere for
any period of time, if so unit requires additional evacuation
to remove moisture.
Model
14/16 SEER
Liquid Line Suction Line
18 3/8 3/4
24 3/8 3/4
30 3/8 3/4
36 3/8 7/8
41 3/8 7/8
42 3/8 7/8
47 3/8 7/8
48 3/8 7/8
59 3/8 1-1/8
60 3/8 1-1/8
* Fittings should be supplied by the installer.
Table 4.
Be extra careful with sharp bends. Tubing can “kink” very
easily, and if this occurs, the entire tube length will have
to be replaced. Extra care at this time will eliminate future
service problems.
Figure 4.
Figure 5.
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