OM 931-6 • MicroTech III Unit Controller for WSHP 21 www.DaikinApplied.com
appendIx C – typICal WIrIng dIagraMs
MicroTech III Unit Controller (Standalone) – 208/230/460/575/60Hz/3-Phase
Drawing No. 668991201
Shown with optional desuperheater
pump wiring.
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.
T
able B
208V
RED
230V
ORG
Note: 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.
Entering Water Temperature (EWT) sensor is included with ECM and/or Secondary Electric Heat.
Legend
Item Description
C1
Capacitor-Compressor
C2 Capacitor-Fan
CC Compressor - Contactor
CM Compressor - Motor
CDS Condensate Overow Sensor
DAT
Discharge Air Temp Sensor
EWT
Entering Water Temp Sensor
HP
High Pressure Switch
HTR Electric Heater Cartridge
IOEXP
I/O Expansion Board / Harness
ISO-NC Isolation Valve - Normally Closed
ISO-NO Isolation Valve - Normally Open
LED1 LED Annunciator / Harness
LED2 LED Annunciator / Harness
LP
Low Pressure Switch
SLTS Suction Line Temp Sensor
LWT
Leaving Water Temp Sensor
MIII MicroTech III Main Board
R1 Relay - Fan Motor
R2 Relay - Electric Heat
RAT
Return Air Temp Sensor
RV Reversing Valve Solenoid
TB1 Power Terminal Block
X1 Transformer
_____
Standard Unit Wiring
_ _ _ _
Optional Wiring (by others)
Notes:
T
ransformer:
Unused wire to be capped.
Desuperheater only available on
1
15-208-230V applications.
To Next Page
Loading...
Need help?
General
