2
5.
Connect one end of the shielded 3-core control cable to
the control wiring terminal block on the outdoor unit. See
Fig. 1.
6.
For wall-hung or under-ceiling/floor units, provide a 1-in.
by 1-in. square opening in the surface behind the unit to
route the shielded 3-core control cable, furred in to con-
nect the indoor unit display panel to the controller.
For concealed ducted, high static ducted, cassette, or
vertical units, the shielded 3-core cable can be routed
through the plenum and the wall to connect the indoor
unit display panel and the controller.
7.
Insert a flat-head screwdriver into the slots provided on
the top of the controller to open the back mounting plate.
See Fig. 2.
8.
Attach the back mounting plate directly over the opening
in the wall, using 4 screws, and route the control cable as
shown in Fig. 3.
9.
Connect the control cable and power to the back of the
controller and mount the controller back onto the mount-
ing plate. See Fig. 4.
WHITE
BLUE
BLA
CK
BLA
CK
YELLO
W
GRA
Y
a40-1879
FROM CENTRAL
CONTROLLER
TO INDOOR
UNITS
OUTDOOR UNIT
CONTROL WIRING
TERMINAL BLOCK
Fig. 1 — Control Wiring Terminal Block
BASE
FRONT
COVER
a40-1876
Fig. 2 — Opening Back Mounting Plate
MOUNTING
SCREW
a40-1880
Fig. 3 — Attaching Back Mounting Plate
X Y E F1 F2 E
FORCED ON
EMG. STOP
R
C
TO OUTDOOR UNIT
X,Y, E
NOT USED
FORCED
ON
SWITCH
EMERGENCY
STOP
SWITCH
24 VAC
a40-1904
Fig. 4 — Central Controller Wiring
