Air Handler
9
4.3.3 Pipe Connection
This air handler comes with a plastic accessory bag which contains: piston, tailpiece and white
teflon seal. Please refer to table7 to verify the piston size before installation.
Table 7 PISTON KIT CHART
OUTDOOR UNIT
INDOOR UNIT INDOORS PISTON SIZE(inch)
PISTON KIT PART NO.
HW13018Na/A-D
HNF13018/A-D
¢
0.053
053
HW13024Na/A-D
HNF13024/A-D
¢
0.054
054
HW13030Na/A-D
HNF13030/A-D
¢
0.064
064
HW13036Na/A-D
HNF13036/A-D
¢
0.067
067
HW13042Na/A-D
HNF13042/A-D
¢
0.071
071
HW13048Na/A-D
HNF13048/A-D
¢
0.079
079
HW13060Na/A-D
HNF13060/A-D
¢
0.084
084
HWR13018Na/A-D HNF13018/A-D
¢
0.055
055
HWR13024Na/A-D HNF13024/A-D
¢
0.057
057
HWR13030Na/A-D HNF13030/A-D
¢
0.068
068
HWR13036Na/A-D HNF13036/A-D
¢
0.067
067
HWR13042Na/A-D HNF13042/A-D
¢
0.073
073
HWR13048Na/A-D HNF13048/A-D
¢
0.082
082
HWR13060Na/A-D HNF13060/A-D
¢
0.091
091
4.4 Special Instructions
This air handler comes with a plastic accessory bag which contains: tailpiece and white teflon
seal.
WARNING
: The coil is shipped under pressure. Release the pressure before installation.
Evaporator Coil Metering Devices
(1) Remove 9/16 nut, then press the Schneider valve to release pressure, no gas indicates a
possible leak.
(2)
After the gas has released, remove the 13/16 nut, Schneider valve and white teflon seal
from the liquid line distributor.
(3) Take the piston from the plastic accessory bag and then Insert the piston into the liquid line
distributor.
(4) Take the tailpiece from the plastic accessory bag and slide the 13/16 nut into place.
(5)
Braze tailpiece to the line set liquid tube.
(6)
Braze suction line. Remove cap closure from suction line .
(7) Insert the suction line into the connection, slide the rubber grommet at least 18" away from
the braze joint.
(8)
After the tailpiece has been cooled, confirm the position of white teflon seal and tighten the
13/16 nut manually.
(9) Torque the 13/16nut to 20-30 ft-lbs.