WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
14
P/N 240008111, Rev. G [06/18/10]
Refrigerant Piping
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 line.
•
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 14, Page 15.)
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.
Preparing for piping
With the unit mounted and leveled per
1.
instructions beginning on page 7.
Leave the left end cap off of the unit to
2.
allow removal of the bottom panel.
Remove the Phillips-heads screws on the
3.
bottom of the unit and remove the bottom
panel (Figure 16, Page 14).
See (Figure 17, Page 14) for locations of
4.
the piping connections in the WLCG/
WLHG unit.
Removing bottom panel
Figure 16
Piping connections at unit
Figure 17
Suction line
(When a reducing bushing is required, install
only here, at the indoor suction-line connec-
tion.)
Liquid line
condensate drain
