CACG/CAHG & CACH/CAHH
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. B [082509]
17
Refrigerant Piping
(continued)
Refrigerant processing
Attach manifold set (
1.
Figure 17).
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 18, Page 17).
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 19, Page 17).
See tables on page 18.
CAUTION
Refer to the charts in the condenser
manual to “fine tune” the refrigerant
charge.
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 17
s1CG
shown
Manifold set up for evacuation
Figure 18
A
C
B
s1CG
shown
Manifold
A
Vacuum pump
B
Micron gage
C
Charging the unit
Figure 19
s2CG
s1CG
Refrigerant
s1CG
shown
