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 (greater than 1 .5 hp)
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
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
JP
8
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)
BLK 7 (L1)
R1
HP
BRN 55
BRN 54
GRN/YEL 97
FA
N
MOTOR
LW
T
DA
T
BLK
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
BLK/RED - 460V
RED - 208V
ORG - 230V
BLK - 575
V
YE
L
BL
U
YEL 89
BLK 81
TB
2
RE
D
OL
T1
T2
L1
T3
L2
L3
YEL 83
N
H
H
2
5
4
YEL 88
ORG 84
N
HG
2
ORG 87
CO
M
24
V
X1
HG
1
R2
CM-2
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
24V NO
24VAC COMMON
24V NC
Note: Switch L2/L3 fan
motor wires for
left-hand unit
Note:
Wiring diagrams are typical. For the
latest drawing version refer to the wir-
ing diagram located on the inside of the
controls access panel of the unit.
Gray tinted areas in the wiring diagram:
Units with factory installed communi-
cation module include Discharge Air
Temperature (DAT) and Return Air
Temperature (RAT) sensors shipped
loose and are field installed. The Leav
-
ing Water Temperature (LWT) sensor is
factory installed.
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
IM 1059-12 LARGE VERTICAL WSHP
35 www.DaikinApplied.com