Carrier 40KMC Installation Instructions Manual page 18

7. Connect L1 to the black wire and L2 to the red wire using
wire nuts and fix the ground wire between the two washers.
The internal control panel can be accessed by opening the grille
and removing the metal cover attached by four screws.
NOTE: The internal control panel does not need to be accessed
during the installation process unless there is a need for service.
8. If any accessories are being installed, refer to the individual
accessory instructions for guidance on wire routing at this
time.
Install All Power, Interconnecting Wiring, Piping and
Drain Hose to Indoor Unit .
1. Run control wiring from the outdoor unit through the access
hole in the wall and make sure you have enough wire to
reach the control box of the unit once hung on the mounting
plate.
. Complete refrigerant piping connections.
a. cut the extreme end of the tubes and remove any copper
shavings with a de-burring blade.
b. Remove the flare nut from the "Flare" connection body
of the indoor unit and insert them into the pipes.
c. make the flares to the pipe ends with the proper flaring
too. The flare end must not have any burrs or imperfec-
tions. the flared walls must be uniform. See Fig. 26
and Fig. 27.
A07L99
Fig. 26 - Removing Burrs
Vv
07200
Fig. 27 - Flared Walls are Equal
d. Lubricate the end of the pipe and thread of the flare
connection with refrigerant oil. Tighten by hand and
then use two wrenches (see Fig. 28) to tighten all con-
nections fully applying the tightening torque shown in
Table 13.
@
0) Adjustable wrench or torque wrench
@ Outdoor end
@
@ Indoor end
A07201
Fig. 28 - Tightening Connections
Table 13 — Tightening Torque
TUBE DIAMETER (in.) TORQUE (ft.—Ib)
3/8 in. 31
5/8 in. 48
3/4 in. 74
@ Indoor unit piping
@ Connection wiring
@® Drain hose
A08ae4
Fig. 29 - Location of Piping, Hose, and Wiring
3. Connect condensate drain piping
Observe ail local sanitary codes when installing condensate
drains. The condensate may be discharged at a maximum
height of 7-1/8 in. (181 mm) above the unit as long as the
ascending tube is vertical and aligned with drainage flange.
If it is necessary to discharge the condensate from a level
above 7-1/8 in. (181 mm), install an auxiliary water dis-
charge pump and a float valve. A float valve is recommen-
ded to stop the compressor if there is a fault at the auxiliary
pump.
18