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10. Wrap the bulb, clamp, and suction line together with
tar tape or other insulating material.
important notES:
• the sensing bulb must be located flush against the
suction line for optimum heat transfer.
• avoid attaching the sensing bulb to the lowest part of
the suction line where condensate may accumulate.
• Do not locate the sensing bulb on vertical sections
of the lineset.
• For horizontal lines, the bulb should not be located
at 12 or 6 o'clock position of the suction line. the
best location is at 4 or 8 o'clock.
• For additional information on proper sensing bulb
locations, please refer to the valve manufacturer's
instructions.
11. Remove and discard the Schrader valve from the
suction header port. important: The TXV will not
function if the valve is not removed.
12. Connect the equalization line from the TXV to the 1/4
port located on the suction line.
CaUtion:
to prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
13. Using two wrenches, tighten all connections.
linESEt ConnECtionS
Connecting Brazed linesets
1. If TXV kit and new liquid line are being installed, skip
to step 4.
2. If original liquid line is being used, relieve all pressure
from the coil by depressing the valve on the liquid line.
Remove the valve core.
3. Using all appropriate cautions, unbraze and remove
the valve holder on the liquid line.
4. Verify the lineset ends are round, clean, and free of any
burrs.
5. Connect the suction and liquid lineset tubes.
CaUtion:
it is recommended that a wet rag be wrapped
around the suction line in front of the close
off plate before applying heat. Failure to keep
components cool during brazing may result
in structural damage, premature equipment
failure, or possible personal injury.
important: to prevent internal oxidation and scaling
from occuring, braze all connections with dry nitrogen
flowing through the joints.
4
6. Braze the individual connections with dry nitrogen flowing
through the joints.
7. Wrap the refrigerant lines with pressure sensitive
neoprene or other suitable material especially where
the lines enter the opening in the sheet metal.
8. Proceed to Completing the Installation (page 5).
Quick Connect 1
1. Determine the appropriate connection kit by referring
to Table 3 (page 6).
CaUtion:
it is recommended that a wet rag be wrapped
around the quick connect before applying heat.
Failure to keep components cool during brazing
may result in structural damage, premature
equipment failure, or possible personal injury.
2. Cut off 2.5 inches off the coil suction and liquid line
tubes. Do not swage the cut ends.
3. Wrap a wet rag around the Quick Connect and braze
the connections from the kit onto the coil.
Figure 5. male Coupling assembly
Figure 6. Female Coupling assembly
4. Verify that the couplings at the ends of the lineset still
have their knives intact.
5. Apply liberal amounts of refrigerant oil to the entire
surface of the diaphragm, O-ring, and threaded area
of the male coupling assemblies (Figure 5). notE: The
amount of oil used must cover all designated surfaces
sufficiently.
6. While holding the coupling halves in proper alignment
with each other, start twisting the threads of the
female coupling nut onto the male coupling assembly.
notE: The coupling end faces should be parallel with
each other and visually in line; this allows the female
O-Ring
Diaphragm
Body
Nut
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