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coupling nut (Figure 6) to be easily hand threaded for
the initial 2-3 rotations. These initial rotations will bring
the diaphragms into contact and a sharp increase in
torque will be felt.
important: IF THE NUT WILL NOT START BY HAND,
ADJUSTTHE POSITION OFTHE LINE SETTO ENSURE
PROPER COUPLING ALIGNMENT AND ELIMINATE/
MINIMIZE ALL SIDE-LOAD FORCE ONTHE COUPLING
DURING ASSEMBLY.
6. Using appropriately sized wrenches (see Table 4, page
6) for both components, tighten the female coupling nut
while preventing rotation of the female body with respect
to the male coupling.
important: The nut should be tightened until a definite
increase in resistance is felt. At this point, the nut will
have covered most of the threads on the male body. It is
important to ensure the male and female coupling bodies
DO NOT rotate during any portion of the wrench installation.
7. Using a permanent marker or scribe, mark a line
lengthwise from the female coupling nut to the female
coupling body.
8. Tighten an additional wrench flat (60°). Refer to the
marking on the coupling nut to confirm the one wrench flat
has occurred. notE: This final wrench flat is necessary
to ensure the formation of the metal to metal leak-proof
seal, between the male and female couplings.
9. Proceed to Completing the Installation section.
Quick Connect 2
This procedure can be used if there is enough room and
lineset length to connect the lineset directly to the coil and
eliminate the need for the quick connects.
1. Verify that there is sufficient length of lineset to reach
the coil. Allow for appropriate and adequate bend radius.
2. Verify that there is sufficient room for the tubing when
appropriate radii are added to the lineset.
3. Cut the existing quick connect ends from the lineset.
4. If TXV kit and new liquid line are being installed, skip
to step 7.
5. 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.
6. Using all appropriate cautions, unbraze and remove
the valve holder on the liquid line.
7. 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.
8. Braze the individual connections with dry nitrogen flowing
through the joints.
9. Wrap the refrigerant lines with pressure sensitive
neoprene or other suitable material especially where
the lines enter the opening in the sheet metal.
10. Proceed to Completing the Installation section.
Downturn
1. Determine the appropriate connection kit by referring
to Table 3 (page 6).
2. Cut off 2.5 inches off the coil suction and liquid line
tubes. Do not swage the cut ends.
3. Connect kit parts to coil.
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. Braze the individual connections with dry nitrogen flowing
through the joints.
5. Connect the suction and liquid lineset tubes.
6. Braze the individual connections with dry nitrogen flowing
through the joints.
7. Proceed to Completing the Installation section.
Completing the installation
1. Check the system for leaks, including the lineset and the
brazed joints. notE: Apply a soap and water solution on
each joint or union with a small paintbrush. If bubbling
is observed, the connection is not adequately sealed.
2. Evacuate the system of moisture and non-condensables
to prevent low efficiency operation or damage to the
unit. The suggested range of evacuation is 250 - 500
microns.
3. Charge the system with refrigerant. please refer to
the outdoor unit installation manual for additional
charging instructions.
4. Install the coil access door (if removed).
5. Properly dispose of all removed parts.
6. Apply power to the unit.
5
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