S1CG/S1HG
Single-Zone,
S2CG/S2HG
Dual-Zone
• Installation, Operation and Maintenance Manual •
P/N 240007754, Rev. C [3/19/2010]
13
Made in the USA
Refrigerant Processing
Charging the unit
Att ach manifold set, vacuum pump, &
1.
Micron Gauge. ( Figure 18 ).
Evacuate line to 500 microns or less to
2.
ensure all moisture has been removed and
there are no leaks (Figure 19).
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 20, pg. 13).
NOTICE
Refer to refrigerant charge table for speci-
fi ed charge.
Charge to proper weight, charge based
4.
on feet of interconnect (see tables on
page 15 ). Only add/remove 410A in
liquid form.
Refer to charts beginning on
5.
page 17 to
“fi ne tune” the refrigerant charge to meet
your conditions.
CAUTION
All systems require fi eld charge adjust-
ments. Refer to the “Refrigerant Charge
Tables” for proper weight charge and
to the supplied “Single-zone Operation
Charts” for proper system pressures and
temperature at diff erent outdoor condi-
tions. Superheat should be used for fi nal
system charge.
CAUTION
Charging should be done with a dial-a-
charge or weighed in with a scale.
When charging and checking pressures/
temperatures on system supplied with
Low Ambient Option, the fan cycle
switch should be jumpered out of the
circuit temporarily to obtain accurate
data.
Manifold set connections at unit
Figure 18
S1CG
S1CG
Shown
Shown
Manifold set up for evacuation
Figure 19
A
A
B
B
C
C
S1CG
S1CG
Shown
Shown
Manifold
A
Vacuum pump
B
Micron gage
C
Charging
Figure 20
S2CG
S2CG
S1CG
S1CG
Refrigerant
Refrigerant
S1CG
S1CG
Shown
Shown
