Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
Safety considerations
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock, or other conditions which
may cause personal injury or property damage. Consult a qualified
installer, service agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use factory-authorized
kits or accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and
work gloves. Use quenching cloth for brazing operations. Have a fire
extinguisher available. Read these instructions thoroughly and follow all
warnings or cautions included in literature and attached to the unit.
Consult local building codes and the National Electrical Code (NEC) for
special requirements.
Recognize safety information. This is the safety-alert symbol .
When you see this symbol on the unit and in instructions or manuals, be
alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION.
These words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
Installation
IMPORTANT: UPON CHANGING THE TXV, the Liquid Line
FILTER DRIER (not provided in kit) must be replaced.
1. Recover the refrigerant or pump down into the outdoor unit.
2. Remove coil access panels from cabinet.
3. Remove the TXV support clamp.
4. With a backup wrench in place, Loosen TXV hex nut and separate
the TXV from the distributor.
5. Ensure the Teflon washer has been removed from the distributor
connection (Fig. 1).
6. Remove the bulb from the suction header by cutting the clamp.
7. Remove or cut the 1/8" OD copper equalizer line from the suction
header.
8. Cut the connection between the liquid line and TXV with a tubing
cutter. Leave enough length on stub to connect new TXV.
NOTE: If the TXV has a mechanical fitting, then—with a backup
wrench in place—loosen the TXV hex nut and separate the TXV from
the liquid line (Fig. 2).
9. Once the existing TXV has been removed, attach the TXV
Warranty tag (with the supplied plastic wire tie) from the kit to the
failed TXV. Fill out the warranty tag and place the tag and TXV in
the replacement box for return.
10. Prior to brazing, wrap the TXV with an appropriate heat-sink
material such as a wet cloth. Be sure the heat-sink material is
behind the braze joint.
11. Attach the TXV inlet tubing to liquid line and braze connection.
After brazing, allow joint to cool before continuing.
340620-4
TXV Furnace / Fan Coil Replacement Kit
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing or servicing system, always turn off main power to
system. There may be more than one disconnect switch. Turn off
accessory heater power if applicable.
WARNING
!
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury.
This coil contains nitrogen precharge of up to 15 PSI. Release of this
pressure through the center of the rubber plugs is required before
removing the plugs.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this warning may result in product damage.
To avoid valve damage to the refrigerant control device while brazing,
valves must be wrapped with a heat-sinking material such as a wet
cloth.
Table 1 – Kit Contents
Item Description
1 TXV
2 Clamp
3 Warranty Return Tag
4 Teflon Washer (Not in all kits)
5 Installation Instructions
