950-0289revB - 15 - July 22, 2022
2. Line set can now be cut (if necessary), to the proper length. Cut the tubing a little longer than measured
distance. Completely remove all burrs from the crosscut section of tubing. Do not allow debris to fall into
copper tube. It is extremely important to clean the copper tubing prior to connecting to system.
3. Install flare nuts and follow standard flaring procedures. Use proper flaring tools for a leak proof connection.
If a flared section is defective, cut it off and follow standard flaring procedures again.
4. After cutting to length, creating the flares and before connecting the line set, clear all foreign materials by
blowing nitrogen through copper tubing. Align the center of the tubing flare with its mating connector. Screw
on the flare nut by hand and tighten the nut with a spanner and torque wrench. See Figure 11.
Note
: Exceeding the tightening torque will damage the flare surface.
Tightening Torque Table:
1/4
”
11
– 22
lbs ft.
3/8
”
23
– 29
lbs ft.
1/2
”
33
– 37
lbs ft.
5/8
”
44
– 48
lbs ft.
5. Verify that the proper line set is being connected to
the intended port of the outdoor unit. Connect the
line sets to their appropriate fittings on the outside
unit, and torque the flare fittings per the table above.
6. Bundle all lines, control cables and condensation
drain together. Be sure to leave ample length on
control cable to allow for termination. Bundle can be
secured together using vinyl tape.
Note:
Condensation drain MUST be placed at the
bottom of the bundle as shown in the Figure 13.
Failure to do so may cause evaporator to drain
improperly.
7. Line sets must have each tube insulated separately,
including their unions with at least 1/4
” thick
insulation. Wrap the refrigeration tubing, drain hose,
and electrical cables with a UV protected vinyl tape.
Overlap insulation at all refrigeration joints per
Figure 14.
Note:
Completely wrap line set with insulation.
Insulation joints may overlap if desired.
CAUTION!
Failure to completely wrap both lines with insulation may result in damage from condensation
forming on lines, and dripping onto walls, ceilings, etc.
Vin yl ta p e
Co n n e ctio n p ip e
( h e a t in su la tio n )
In d o o r u n it p ip in g
Bin d th e
s to g e th e r
so th a t th e r e is n o g a p
p ip e
.
O ve r la p th e in su la tio n
Torque wrench
Spanner
Flare nut
Joint
Connection pipe
Suction Line
Liquid Line
Condensation Drain
Control cable
Figure 12
DO NOT CROSS WIRES OR CROSS
CONNECT SYSTEMS TO OUTDOOR
UNIT.
Figure 11
Figure 13
Figure 14
