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XC15 SERIES
Brazing Connection Procedure
Before brazing, remove the access panel (see figure 4);
then remove the narrow piping panel to prevent burning off
the paint (see figure 9).
Remove 2
screws and re-
move panel
before brazing.
Figure 9
Piping Panel Removal
PIPING
PANEL
Line set
connection
points.
1. Cut ends of the refrigerant lines square (free from
nicks or dents). Debur the ends. The pipe must remain
round, do not pinch end of the line.
2. When making line set connections, use 1 to 2 psig dry
nitrogen to purge the refrigerant piping. This will help
to prevent oxidation and the introduction of moisture
into the system.
3. Use silver alloy brazing rods (5 or 6 percent minimum
silver alloy for copper−to−copper brazing or 45 percent
silver alloy for copper−to−brass or copper−to−steel
brazing) which are rated for use with R−410A refriger-
ant. While brazing-in the line set connections, wrap a
wet cloth around the valve body and the copper tube
stubs.
4. Quench the joints with a wet cloth to prevent possible
heat damage to the valve core and opening port.
NOTE − The tube end must stay bottomed in the fitting
during final assembly to ensure proper seating, seal-
ing and rigidity.
5. Install the thermal expansion valve in the liquid line at
the indoor coil.
NOTE − Expansion valve (not provided; obtain sepa-
rately) must be approved for use with R−410A refriger-
ant.
Refrigerant Line Sets: Installing Horizontal Runs
METAL
SLEEVE
STRAPPING MATERIAL
(Around vapor line only)
TAPE OR WIRE TIE
WIRE TIE
(Around vapor line only)
FLOOR JOIST OR
ROOF RAFTER
TAPE OR WIRE TIE
To hang line set from joist or rafter,
use either metal strapping material
or anchored heavy nylon wire ties.
Figure 10
8 feet
8 feet
Strap the vapor line to the joist or rafter
at 8 ft. intervals then strap the liquid line
to the vapor line.
FLOOR JOIST OR ROOF RAFTER
