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Insulated Liquid Line
Insulated Suction Line
Tape
Figure 5-3
5.5 Reuse Existing Refrigerant Lines
CAUTION
If using existing refrigerant lines make certain
that all joints are brazed, not soldered.
For retrofit applications, where the existing refrigerant
lines will be used, the following precautions should be
taken:
Ensure that the size of the refrigerant lines is correct.
Refer to Section 5.2 and Table 5-2.
Ensure that the refrigerant lines are free of leaks,
acid, and oil.
NOTE
The manufacturer recommends installing only
approved matched indoor and outdoor systems.
All of the manufacturer's split systems are AHRI
certified. Some of the benefits of installing
approved matched indoor and outdoor split
systems are maximum efficiency, optimum
performance and the best overall system
reliability.
Sheet Metal Hanger
05
Figure 5-4
6 REFRIGERANT LINE ROUTING
6.1 Precautions
NOTE
Take precautions to prevent noise within the
building structure due to vibration transmission
from the refrigerant lines. For example:
When the refrigerant lines have to be fastened to floor
joists or other framing in a structure, use isolation
type hangers.
Isolation hangers should also be used when refriger-
ant lines are run in stud spaces or enclosed ceilings.
Where the refrigerant lines run through a wall or sill,
they should be insulated and isolated.
Isolate the lines from all ductwork.
Minimize the number of 90º turns.
Use PVC piping as a conduit for all underground
installations as shown in Figure 15. Buried lines
should be keep as short as possible.
The lines should not obstruct service access to the
coil, air handling system or filter.
Care must also be taken to isolate the refrigerant
lines to minimize noise transmission from the
equipment to the structure.
Comply with National, State, and Local codes
when isolating linesets from joists, rafters, walls,
or other structural elements.
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