Page 6 of 19
506874-01
Issue 1140
7.
Install the factory-supplied fixed orifice (or thermal
expansion valve which is sold separately and which is
approved for use with HCFC-22 refrigerant) in the liquid
line at the indoor coil.
Refrigerant Metering Device
2SCU13 units are designed for use with either fixed orifice
or TXV systems. Refer to the appropriate following section
for information on installing the chosen refrigerant metering
device.
Fixed Orifice Systems
2SCU13 units are shipped with a fixed orifice refrigerant
metering device. See Table 3 for the proper fixed orifice
size for each unit. In nonstandard applications, the fixed
orifice provided with the indoor unit may not be appropriately
sized to be matched with the 2SCU13 unit. If necessary,
replace the existing indoor unit fixed orifice with the orifice
supplied with the 2SCU13 unit. Place the supplied fixed
orifice sticker on the indoor cabinet after installation.
Figure 8 shows how to install the replacement fixed orifice.
Do not twist distributor tubes when loosening the seal nut from
the orifice housing. Use wrench to back up the distributor.
Table 3
Fixed Orifice Data
Model
Part
Number
Drill
Size
2SCU13- 18
2SCU13- 24
2SCU13- 30
2SCU13- 36
2SCU13- 42
2SCU13- 48
2SCU13- 60
100484-07
100484-12
100484-19
100484-24
100484-26
100484-36
100484-43
.055
.062
.070
.076
.078
.089
.096
Figure 7
Refrigerant Line Sets: Installing Vertical Runs (new construction shown)
Outside Wall
Wood Block
Between Studs
IMPORTANT: Refrigerant
lines must not contact wall.
Vapor Line
Liquid Line
Wire Tie
Inside Wall
Strap
Sleeve
Wire Tie
Wire Tie
Strap
Wood Block
Sleeve
Vapor Line Wrapped
with Armaflex
Liquid Line
Caulk
PVC Pipe
Fiberglass
Insulation
Outside Wall
IMPORTANT:
Refrigerant
lines must not
contact structure.
NOTE:
Similar installation practices
should be used if line set is to be installed
on exterior of outside wall.