Daikin Microtech III Operation And Maintenance Manual page 28

MicroTech III controller with I/O expansion module – units with external motor
overload – 208/230, 460, 575-60-3 (greater than 1 .5 hp)
Note: Wiring diagrams are typical. For the lat-
est drawing version refer to the wiring diagram
located on the inside of the controls access
panel of the unit.
Gray tinted areas in the wiring diagram: Units
with factory installed communication module
include Discharge Air Temperature (DAT) and
Return Air Temperature (RAT) sensors shipped
loose and are field installed. The Leaving Water
Temperature (LWT) sensor is factory installed.
BLK 80
BLU 20
E - EMER SHTDN INPUT
U - MARK IV - OCC/UNOCC
1 - ROOM SENSOR LED
2 - FAN MODE/HT-CL-AUTO
3 - SETPOINT ADJUST
4 - ROOM SENSOR/TO
5 - DC SIGNAL COM
R - 24VAC
A - ALARM OUTPUT
W2 - HEAT - 2
W1 - HEAT - 1
Y2 - COOL 2
Y1 - COOL - 1
G - FAN
O - W3 - HEAT -3
C - 24VAC COMMON
24VAC COMMON
24V NC
24V NO
BLK 60
BLK 61
BLU 40
BLU 41
IO Expansion Module
OM 1239
GRN/YEL 97
BLK
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
YEL 18
BLU 21
Communication
Module
BLK 81
Note: Switch L2/L3 fan
motor wires for
left-hand unit
BLK 1
YEL 2
RED 3
BLK 4
YEL 5
RED 6
Notes: 1. "Run/Prg" Jumper to be in "Run"
_ _ _ _
28
t W
ypICal IrIng
position for normal operation
* Leaving Water (LWT), Discharge
Air (DAT) and Return Air
Temperature (RAT) sensors are
field installed.
Denotes optional feature
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