WLCG/WLHG
High-Wall Air Handlers
• Installation, Operation and Maintenance Manual •
Comfort where it counts
16
P/N 240008111, Rev. G [06/18/10]
Refrigerant Piping
(continued)
Refrigerant processing
Attach manifold set (Figure 20 page 16).
1.
Evacuate line to 500 microns or less to
2.
ensure all moisture has been removed and
there are no leaks.
Once certain of a good evacuation and
3.
leak free joints, back-seat the valves
(counter-clockwise) to open and allow
factory charge to fill lines and indoor unit
(Figure 21, Page 16).
NOTICE
Refer to refrigerant charge table for speci-
fied charge.
Use only R410A refrigerant. Add and
4.
remove only liquid, never vapor.
Charge to proper weight, charge based on
5.
feet of interconnect (Figure 22, Page 16).
See tables on page 17.
CAUTION
Refer to the charts in the condenser
manual to “fine tune” the refrigerant
charge.
WLCG30 and WLCG36 utilize a TXV
(thermo expansion valve), which should
be set at 15°F.
CAUTION
Charging should be done with a dial-a-
charge or weighed in with a scale.
WARNING
It is illegal to discharge refrigerant into
the atmosphere. Use proper reclaiming
methods & equipment when installing
or servicing this unit.
Manifold set connections at unit
Figure 20
S1CG
Shown
Manifold set up for evacuation
Figure 21
A
B
C
S1CG
Shown
Manifold
A
Vacuum pump
B
Micron gage
C
Charging the unit
Figure 22
S2CG
S1CG
Refrigerant
S1CG
Shown
