Refrigerant Piping - ECR EMI America Series Installation, Operation And Maintenance Manual

CAUTION
• Avoid piping on wet and rainy days.
• Use only clean, refrigeration-grade
copper tubing.
• Use tubing benders to guard against
kinking.
• Be certain no burrs remain on the
fittings.
• Cap ends of lines until ready for con-
nections. Be certain that plastic end
caps remain in place when inserting
through wall openings.
• Insulate the suction and condensate
lines all the way to the cassette.
• Isolate tubing from transmitting vibra-
tion to the building or unit and avoid
contact with sharp edges.
• Wrap refrigeration valves with a wet
rag "heat sink" to protect valves while
brazing. (See Figure 16, Page 16.)
• DO NOT use a suction line size larger
than the condenser service valve con-
nection. This can harm the compres-
sor. Install a reducer, when used, only
on the inside connection.
NOTICE
The cassette is equipped with a Flo Rater
piston expansion device. Connections
are sweat type.
P/N 240007756, Rev. A [051509]
CACG/CAHG & CACH/CAHH
• Installation, Operation and Maintenance Manual •

Refrigerant Piping

Figure 14
(When a reducing bushing is required, install
only at the indoor suction-line connection.)
Line sizing
1. Size lines per
2. The suction line size must match the con-
denser service valve connection.
a.
15
Air Handlers
Piping connections at unit
suction line
Table 11, Page 60.
When matching the model 24 with
an 18,000-Btuh condenser, you must
use a 5/8-inch suction line, with a re-
ducer installed as shown in Figure 14,
Page 15.
liquid line
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