York TIWM018B21S - Indoor Unit Wiring Connection Diagrams

P5417052
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8.3 Position of Electrical Wiring Connection
● Ensurethatthewireterminalsaretighttorecommendedtorquespecs.Failuretodothiscanresult
inelectricalshockorreattheterminalconnection.
● Donotapplyexcessforcewhentighteningcables.Thiscanresultinheatgenerationandre.
● Makesurethattheterminalsdonotcomeintocontactwiththeelectricalbox.Iftheterminalsare
tooclosetothesurface,itcanresultintheactivationofthecircuitprotection,heatgenerationand
reattheterminalconnection,andanelectricalshock.
(1) The electrical wiring connections at the terminal block for the indoor unit are shown in the gures
below. Check the outdoor unit conguration before the wiring work begins.
TIWM006B21StoTIWM012B21S TIWM015B21StoTIWM030B21S
(A)
(B)
(C)
Screw
NOTE:
When standard grade electrical wire is used for eld-wiring connections, an M4 terminal crimping tool
should be used. When a single wire is used, reshape it as shown below. The screws at the terminal
block should be tightened using the torque specs in the table at right.
Tightening Torque for Terminals
Size Tightening Torque
Power Supply M4
0.7 - 1.0
(1.0 - 1.3
ft·lbs
N-m)
Communication M3.5
0.9
(1.2
ft·lbs
N·m)
(2) Connect the cable for the optional controller or the optional extension cable to the terminals inside the
electrical box through the connection hole on the cabinet.
(3) Connect the power supply and the ground wiring to the terminals in the electrical box.
(4) Connect the cables between the indoor unit and the outdoor unit to the terminals in the electrical box.
(5) Connect cables to correspond with terminals of the same number or color band.
(6) Install the communication cable between indoor units and the outdoor unit for the same system.
● Do not connect the main power supply wiring to the communication line
(Terminals A, B, 1, and 2 of TB2). If connected, the printed circuit board
(PCB) will be destroyed.
● Pay attention to following when wires are connected at the terminal block:
(A) Attach a piece of insulation tape or a sleeve at each terminal.
(B) Maintain the recommended distance between the electrical box and
the terminals to prevent a short circuit.
(C) Maintain the recommended distance between terminals.
NOTICE
AB12
(Field-Wiring Connection Side)
L1 L2
(Mp)
N
TB2
TB1
AB12
(Field-Wiring Connection Side)
L1 L2 N
(Mp)
TB2
TB1
Stranded Wire Single Wire
Connect it with
Crimping Terminal.
Connect it Direct
As Shown Below
.