Lennox Elite XC13 Installation Instructions Manual page 14

TIGHTENING DISTANCES
Use figure 23 to tighten fasteners and caps when a torque
wrench is not available.
1/8 TURN
11 12
1
2
10
9 3
4
8
5
7
6
Figure 23. Tightening Distances
TYPICAL FIXED ORIFICE INSTALLATION
PROCEDURE
Use the following procedure along with figure 24 to install a
fixed orifice kit.
(Uncased
LIQUID LINE ASSEMBLY
Coil Shown)
WITH BRASS NUT
Figure 24. Typical Fixed Orifice Installation
1. Remove the field−provided fitting that temporary
reconnected the liquid line to the indoor unit's liquid
line orifice housing.
2. Ensure that the fixed orifice supplied with the outdoor
unit is installed with the nylon seat pointing toward the
distributor assembly.
3. Apply a small amount of refrigerant oil on the Teflon
ring and insert the Teflon ring securely into the orifice
housing.
4. Attached the liquid line assembly to the liquid line
orifice housing. Finger tighten and use an appropriately
sized wrench to turn an additional 1/2 turn clockwise
as illustrated in figure 23, or 20 ft−lb.
5. Place the supplied fixed orifice sticker on the indoor
cabinet after installation.
TYPICAL TXV INSTALLATION PROCEDURE
The TXV unit can be installed internal or external to the
indoor coil. In applications where an uncased coil is being
installed in a field−provided plenum, install the TXV in a
manner that will provide access for field servicing of the
TXV. Refer to Figure 25 for reference during installation of
TXV unit.
506120−01 03/10
1/2 TURN
11 12
1
2
10
9 3
4
8
5
7
6
LIQUID LINE
ORIFICE HOUSING
FIXED
NYLON
ORIFICE
TEFLON
SEAT
RING
LIQUID
LINE
To prevent any possibility of water damage, properly
insulate all parts of the TXV assembly that may sweat due
to temperature differences between the valve and its
surrounding ambient temperatures.
TWO PIECE
PATCH PLATE
(UNCASED COIL
ONLY)
LIQUID LINE
HOUSING
DISTRIBUTOR
TUBES
DISTRIBUTOR
ASSEMBLY
MALE EQUALIZER LINE
FITTING (SEE FIGURE 27
FOR FURTHER DETAILS
SENSING BULB
REQUIRED IF MOUNTED EXTERNAL
TO THE COIL CASING. SEE FIGURE 26
FOR BULB POSITIONING.
Figure 25. Typical TXV Installation
1. Remove the field−provided fitting that temporary
reconnected the liquid line to the indoor unit's
distributor assembly.
2. Install one of the provided Teflon rings around the
stubbed end of the TXV and lightly lubricate the
connector threads and expose surface of the Teflon
ring with refrigerant oil.
3. Attach the stubbed end of the TXV to the liquid line
orifice housing. Finger tighten and use an appropriately
sized wrench to turn an additional 1/2 turn clockwise
as illustrated in figure 23, or 20 ft−lb.
4. Place the remaining Teflon ring around the other end
of the TXV. Lightly lubricate connector threads and
expose surface of the Teflon ring with refrigerant oil.
5. Attach the liquid line assembly to the TXV. Finger
tighten and use an appropriately sized wrench to turn
an additional 1/2 turn clockwise as illustrated in figure
23, or 20 ft−lb.
6. Attach the suction line sensing bulb in the proper
orientation as illustrated in figure 26 using the clamp
and screws provided.
NOTE − Insulating the sensing bulb once installed may be
required when the bulb location is external to the coil
casing.
Page 14
(Uncased Coil Shown)
STUB END
ORIFICE
TXV
TEFLON
RING
EQUALIZER
LINE
LIQUID LINE ASSEMBLY
WITH BRASS NUT
SUCTION
LINE
)
INSULATION IS
TEFLON
RING
SENSING
LINE
LIQUID
LINE