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507788-01C mrcool.com Page 9 of 20
BOTTOM OF
CABINET
DUCT
ADAPTER
1−1/2
(38)
”A”
BRAKE DOWN 90 DEGREES
1/4 (6) DIA.
2−HOLES
"A"
1−1/2(38)
3/4
(19)
3/4
(19)
1−1/2
(38)
3/4
(19)
1/2
(13)
3/4
(19)
DUCT
FLANGE
CABINET
DOOR FLANGE
UNIT SIZE
Cabinet and Duct Flange
-024, -030
-036, -042,
-048, -060
18-3/8"
21-1/2"
Figure 9. Cabinet and Duct Flange
Brazing Refrigerant Lines
Refrigerant lines must be clean, dry, refrigerant-grade
copper lines. Air handler coils should be installed
combinations.
Handle the refrigerant lines gently during the installation
restriction.
Do not remove the caps from the lines or system
connection points until connections are ready to be
completed.
IMPORTANT
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.
WARNING
When using a high pressure gas such as
nitrogen to pressurize a refrigeration or air
conditioning system, use a regulator that
psig (6.9 to 13.8 kPa).
WARNING
charge from only the high side may result in
suction tubing. Application of a brazing
torch to a pressurized system may result in
ignition of the refrigerant and oil mixture.
applying heat.
WARNING
hazardous to your health.
Avoid breathing vapors or fumes from brazing
areas.
Wear gloves and protective goggles or face shield to
protect against burns.
CAUTION
prevent oxidation and the introduction of moisture into
the system.
IMPORTANT
NOTE:
1.
the lines in a direct path, avoiding unnecessary turns
and bends.
2. Make sure that the suction line is insulated over the
entire exposed length and that neither suction nor
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