Lennox Elite Series Installation Instructions Manual page 14

2. Install one of the provided Teflon rings around the
stubbed end of the CTXV and lightly lubricate the
connector threads and expose surface of the Teflon
ring with refrigerant oil.
3. Attach the stubbed end of the CTXV 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 washer around the other
end of the CTXV. Lightly lubricate connector threads
and expose surface of the Teflon ring with refrigerant
oil,
5. Attach the liquid line assembly to the CTXV. 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 25 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.
ON LINES SMALLER THAN
SUCTION LINE 7/8", MOUNT SENSING BULB
AT EITHER THE 3 OR 9
'Lr " * _,,,_ _ _,_,"_ __CK POSITION.
'X_L,,'*"L_"
BULB\_
SUCTION LINE
(BULB .
ON 7/8" AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O'CLOCK
'TO%M%EVL% MOUNT
NOTE - NEVER MOUNT ON BOTTOM OF LINE.
Figure 25. TXV Sensing Bulb Installation
7. Remove and discard either the flare seal cap or flare
nut with copper flare seal bonnet from the equalizer
line port on the suction line as illustrated in figure 26.
A IMPORTANT
FLARE SEAL_
CAP
÷
J_ FLARE NUT
X COPPER
OR
--FLARE SEAL
BONNET
J
•_MALE BRASS EQUALIZER
LINE FITTING
SUCTION LINE
Figure 26. Copper Flare Seal Bonnet Removal
8. Connect the equalizer line from the CTXV to the
equalizer suction port on the suction line. Finger
tighten the flare nut plus 1/8 turn (7 ft-lbs) as illustrated
in figure 23,
NOTE - To prevent any possibility of water damage,
properly insulate all parts of the CTXV assembly that may
sweat due to temperature differences between the valve
and its surrounding ambient temperatures,
See the Lennox XP16 Engineering Handbook for
approved CTXV kit match-ups and application
information.
The reference CTXV kits include:
O_TEFLON
RINGS (2) _ I_
STRAP (1)
Figure 27. CTXV Kit Components
After the line set has been con nected to the indoor unit and
air conditioner, check the line set connections and indoor
unit for leaks. Use the following procedure to test for leaks:
IMPORTANT
505329M 04/08
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