t
yPiCal
W
iring
d
iagraMs
MicroTech III controller with I/O expansion module with hot gas reheat (HGRH)
208/230, 460, 575-60-3 (1 .5 hp or less)
YEL 14
BLU 15
LED1
SLTS
RV
LED1
GRY 46
BLU 41
BLU 40
RA
T
LED2
IOEX
P
CO
S
BLK 60
BLK 61
SEE NOTE
BLU 21
LED2
T1
TB
1
YEL
RE
D
L1
L2
L3
CM-1
BL
K
L1
T2
T3
L3
L2
L1
SERVICE
&
DISCONNECT
L3
L2
YEL 18
JP_
2
JP_
3
JP_
4
JP_
5
JP_
6
JP_
7
JP_
8
H1
H2
N3
N2
N1
L1-3
L1-2
L1-1
H3
H5
H4
H7
H6
H8
H9
TB
2
TEST-1
TB
1
TB
3
RUN PRG
JTAG
BLU 20
LP
2
HP
2
SLTS
2
1
1
1
1
1
JP
1
JP8
JTAG
RV
2
YEL 11
RED 12
CC
1
BLK 1
YEL 2
RED 3
BRN 52
BRN 53
BLU 42
BLU 43
BLK 62
BLK 63
YEL 19
LP
T3
BLK 10
YEL 8 (L2)
RED 9 (L3)
R1
HP
BRN 55
BRN 54
GRN/YEL 97
FA
N
MOTOR
LW
T
DA
T
YEL
BL
U
YEL 45
EW
T
BLK/RED-460V
RED-208V
ORG-230V
BLK-575V
1
RED 86
WHT 85
R2
1
3
BLK 80
YEL 82
HUMIDISTAT SIGNAL
AUX HEAT
24VAC COMMO
N
BLK 80
GN
D
JP_
1
BLK 4
YEL 5
RED 6
YEL 27
BLU 28
CC
2
RE
D
YE
L
BL
K
L3
L2
L1
X2
BL
K
YE
L
BLU
YEL 89
BLK 81
TB
2
ORG 87
YEL 83
YEL 88
R2
2
5
4
ORG 84
H
HG
1
HG
2
H
N
24
V
X1
CO
M
BLK
BLK/RED - 460V
RED - 208
v
ORG - 230V
BLK - 575
V
CM-2
BLK7 (L1)
IO Expansion Module
C - 24VAC COMMON
O - W3 - HEAT -3
G - FAN
Y1 - COOL - 1
Y2 - COOL 2
W1 - HEAT - 1
W2 - HEAT - 2
A - ALARM OUTPUT
5 - DC SIGNAL COM
4 - ROOM SENSOR/TO
3 - SETPOINT ADJUST
2 - FAN MODE/HT-CL-AUTO
1 - ROOM SENSOR LED
U - MARK IV - OCC/UNOCC
E - EMER SHTDN INPUT
R - 24VAC
Communication
Module
MicroTech III Controller
24V NO
24VAC COMMON
24V NC
Note: Switch L2/L3 fan
motor wires for
left-hand unit
Legend
Item Description
CC1
Circuit 1 Compressor Contactor
CC2
Circuit 2 Compressor Contactor
CM1
Circuit 1 Compressor
CM2
Circuit 2 Compressor
COS
Condensate Overflow Sensor
HP
Circuit 1 High Pressure Switch
HP2
Circuit 2 High Pressure Switch
IOEXP
I/O Expansion Board / Harness
LED1
LED Annunciator / Harness
LED2
LED Annunciator / Harness
*RAT
Return Air Temp Sensor
*LWT
Leaving Water Temp Sensor
LP
Circuit 1 Low Pressure Switch
LP2
Circuit 2 Low Pressure Switch
SLTS
Circuit 1 Suction Line Temp Sensor
SLTS2
Circuit 2 Suction Line Temp Sensor
R1
Fan Motor Starter
RV
Circuit 1 Reversing Valve Solenoid
RV2
Circuit 2 Reversing Valve Solenoid
TB1
Power Terminal Block
X1
75 VA Transformer
*DAT
Discharge Air Temp Sensor
EWT
Entering Water Temp Sensor
R2
Relay HGRH
HG1
HGRH Solenoid 1
HG2
HGRH Solenoid 2
TB2
Terminal Block
X2
Transformer 24VAC Output
Note:
Wiring diagrams are typical. For the latest
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.
Notes:
1. “Run/Prg” Jumper to be in “Run”
position for normal operation
* Leaving Water (LWT), Discharge
Air (DAT) and Return Air
Temperature (RAT) sensors are
field installed.
_ _ _ _ Denotes optional feature
www.DaikinApplied.com 34
LARGE VERTICAL WSHP IM 1059-12