CACH/CAHH/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. G [07/08/10]
17
Refrigerant Piping
(continued)
Refrigerant processing
Att ach 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 fi ll lines and indoor unit
( Figure 18, Page 17 ).
NOTICE
Refer to refrigerant charge table for speci-
fi ed 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
S1CG
Shown
Shown
Manifold set up for evacuation
Figure 18
A
A
C
C
B
B
S1CG
S1CG
Shown
Shown
Manifold
A
Vacuum pump
B
Micron gage
C
Charging the unit
Figure 19
S2CH
S2CH
S1CG
S1CG
Refrigerant
Refrigerant
S1CG
S1CG
Shown
Shown