20
RUN POWER WIRING FOR INDOOR UNIT
Be sure field wiring complies with local building codes and NEC,
and unit voltage is within limits shown in Tables 17 through 20.
Contact the local power company for correction of improper line
voltage.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Unit failure as a result of operation on improper line voltage or
excessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation could void
any applicable manufacturer warranty.
NOTE
:
Use copper wire only between disconnect switch(es)
and unit.
NOTE
:
Install branch circuit disconnect of adequate size to
handle unit starting current per NEC. Locate disconnect
within sight of, and readily accessible from, unit, per section
440--14 of NEC. Some codes allow indoor unit to share
disconnect with outdoor unit if disconnect can be locked; check
local code before installing in this manner.
The 40MKCB**F and 40MKQB**F units require their own
power supply.
1. Locate the indoor power supply.
2. Locate and install disconnect switch per NEC and local
codes.
3. Run power supply wiring to disconnect switch.
4. Run power wiring from disconnect switch to the unit’s
control box. Use copper wire only between the disconnect
switch and unit.
5. 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 the 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 from the
suspension bolts or mounted to the wall.
2. It is a recommended that flare connections is located on the
outside of the wall where the indoor unit is to be
mounted/hung. If an extension pipe is required to facilitate this
location, measure, fabricate and install the extension pipes to
the indoor unit before hanging/mounting to the wall.
3. If piping connections are on the outside wall, pass the pipes
(refrigerant and drain) through the wall sleeve and then
hook/hang the indoor unit body. Support the unit away
from the bottom using a tool or a piece of wood.
NOTE
: Tie together the refrigerant piping, the drain hose, and the
electrical connection wires and ensure that the drain hose is at the
bottom.
2
3
2
3
A08364
Fig. 39 – Location of Piping, Hose, and Wiring
A01799
Fig. 40 – Removing Burrs
L
L
A07200
Fig. 41 – Flared Walls as Equal
4. Route the power and control wiring through the back side
of the unit and to the control box area. If the wired remote is
to be used, perform any modifications required at this time.
Refer to the Accessory installation instructions.
5. Remove the control box cover and finish all indoor unit
wiring connections as shown on the wiring diagram or in
the accessory installation instructions. Replace the control
box cover.
