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OM 931-6 • MicroTech III Unit Controller for WSHP

www.DaikinApplied.com

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MicroTech III Unit Controller with PSC Motor, Desuperheater and I/O Expansion

Module for Hot Gas Reheat Control (Unit Sizes 019-070) 208/230/60/1-Phase

Drawing No. 669007101A

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.

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.

Table B

208V

RED

230V

ORG

Notes:

Transformer:

Unused wire to be capped.

Legend
Item Description

Capacitor-Compressor

Capacitor-Fan

Compressor - Contactor

Compressor - Motor

COS

Condensate Overflow Sensor

DAT

Discharge Air Temp Sensor

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

DSHP

Desuperheater Pump

HGRH 3-Way Valve Solenoid

24 VAC Supply I/O Expansion Brd.

LED1

LED Annunciator / Harness

LED2

LED Annunciator / Harness

Low Pressure Switch

SLTS

Suction Line Temp Sensor

LWT

Leaving Water Temp Sensor

MIII

MicroTech III Main Board

Relay - Fan Motor

Relay - Electric Heat

RAT

Return Air Temp Sensor

Reversing Valve Solenoid

TB1

Power Terminal Block

Primary 24 VAC Transformer

Secondary 24 VAC Transformer

_____

Standard Unit Wiring

_ _ _ _

Optional Wiring (by others)

Содержание MicroTech III

Страница 1: ...ion Maintenance Manual MicroTech III Unit Controller for Water Source Heat Pump Units Used with Enfinity Models CCH CCW VFC VFW MHC MHW LVC LVW OM 931 6 Group WSHP Part Number 910157590 Date September...

Страница 2: ...al Equipment 15 Appendix A 15 Operation and Maintenance of I O Expansion Module 15 Start up 16 Initial Power up 16 Operation 17 Electric Heat Controls 17 Multiple Speed Fan Control 17 Circuit Two Addi...

Страница 3: ...ump LonWorks Communication Module IM 928 MicroTech III Water Source Heat Pump Unit Controller BACnet MS TP Communication Module IM 933 LonWorks Plug In Software for use with MicroTech III Unitary Cont...

Страница 4: ...put H7 1 1 No Connection H7 2 No Connection MicroTech III Unit Controller H7 3 Red LED Output H7 4 Green LED Output H7 5 Yellow LED Output H7 6 Red Green Yellow LED Common H8 1 1 Isolation Valve Pump...

Страница 5: ...M 931 6 MicroTech III Unit Controller for WSHP 5 www DaikinApplied com MicroTech III Unit Controller MicroTech III Unit Controller Connections Figure 1 MicroTech III Unit Controller Terminal Locations...

Страница 6: ...ed Service Test Mode Fan Operation JP2 Open Continuous Fan Operation On when not operating in the unccupied mode Shorted Cycling Fan Operation Auto Loop Fluid JP3 see warning Open Water Loop Fluid wat...

Страница 7: ...1 and Y1 respectively for single circuit units in occupied mode For information on W2 and Y2 for dual circuit units refer to Dual Circuit Units on page 17 The MicroTech III unit controller is configur...

Страница 8: ...hen the Y1 terminal is de energized the following occurs 1 The compressor de energizes 2 The fan de energizes unless the G terminal is energized 24VAC or JP2 is open 3 The IV PR H8 control output ener...

Страница 9: ...unit operation No faults or modes have higher priority than a brownout fault condition Remote shutdown and brownout conditions have the same level of priority See Priority of Faults and Modes on page...

Страница 10: ...r LP circuit is closed the unit does not return to normal operation until the control board is reset The unit is locked out in this manner until the unit can be serviced The control board is reset by...

Страница 11: ...ers an automatic lockout on the 3rd fault The retry count is reset to zero every 24 hours Refer to Table 3 Faults Tenant Override Note It is recommended that the Occupied Opera tion on page 7 and Unoc...

Страница 12: ...figured with mode and fault priorities Table 4 illustrates that the lower the priority level number the higher the priority of the fault or mode There are some exceptions to this priority list For exa...

Страница 13: ...y adhere to field wiring procedures regarding proper lockout and tagout of components Figure 6 MicroTech III Unit Controller LED Status and Faults Troubleshooting Reference Flash Yellow LED Read Outpu...

Страница 14: ...pressor wiring for defective wiring or loose connection Check for faulty compressor capacitor Insufficient cooling or heating Check for lock rotor amp draw Check for defective compressor internal wind...

Страница 15: ...evice to drive a mechanical relay not supplied by Daikin then use the mechanical relay s dry contacts to drive the desired MicroTech III unit controller input The MicroTech III unit controller s valve...

Страница 16: ...R Dehumidification JP2 JP2 Open None default JP2 Shorted Hot Gas Water Reheat HGR Secondary Heating Options JP3 JP4 JP3 Open None JP4 Open JP3 Shorted Supplemental Electric Heat JP4 Open JP3 Open Boil...

Страница 17: ...xpansion Module and no electric heat it is possible to configure the I O Expansion Module for a two speed fan If there is a call for continuous fan compressor off the fan motor runs in low speed If th...

Страница 18: ...in 6 H8 Pin 1 Dual compressor compressor 2 normally open output all others fan medium speed normally open Pin 2 24 VAC common Pin 3 No connection Pin 4 Dual compressor reversing valve for circuit 2 al...

Страница 19: ...nit mounted return air discharge air and leaving water temperature sensor Wall mounted temperature sensors include setpoint adjustment and tenant override The user has the capability of substituting t...

Страница 20: ...he range 0 127 Four green status LEDs on the communication module indicate communication activity on the MS TP communication network and with the unit controller Figure 10 MicroTech III BACnet MS TP S...

Страница 21: ...emperature 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 Ov...

Страница 22: ...ering 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...

Страница 23: ...d 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...

Страница 24: ...d with ECM and or Secondary Electric Heat Table B 208V RED 230V ORG 460V BLK RED Legend Item Description C1 Capacitor Compressor C2 Capacitor Fan CC Compressor Contactor CM Compressor Motor CDS Conden...

Страница 25: ...able B 208V RED 230V ORG Notes Transformer Unused wire to be capped Legend Item Description C1 Capacitor Compressor C2 Capacitor Fan CC Compressor Contactor CM Compressor Motor COS Condensate Overflow...

Страница 26: ...alve Capability Short Cycle Protection Random Start Unoccupied Mode Override Mode Pump Restart Loadshed Brownout Protection Unit Shutdown Condensate Overflow Protection Remote Reset 1 Intelligent Rese...

Страница 27: ...OM 931 6 MicroTech III Unit Controller for WSHP 27 www DaikinApplied com This page left intentionally blank...

Страница 28: ...o its standard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied Representative for warranty details To find your local Daikin Applied Representative go...

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