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Honeywell MiniZone EMM-3U, Product Data, Page: 10 / 16

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Honeywell MiniZone EMM-3U Product Data Download Page 10

EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL

68-0237-2

10

Fig. 16. Two-transformer system wiring diagram.

Fig. 17. Single-stage heat pump with separate auxiliary 

and emergency heat wiring diagram.

Fig. 18. Single-stage heat pump with auxiliary heat wiring 

diagram.

COOLING
TRANSFORMER

HEATING
TRANSFORMER

L1
(HOT)

L2

HEAT
RELAY

L1
(HOT)

L2

FAN
RELAY

COOLING
CONTACTOR

M14765A

REMOVE FACTORY INSTALLED R

H 

TO R

C

 JUMPER.

1

R

C

R

H

W

1

W

2

E

B

O

Y

1

Y

2

G

PANEL

1

TRANSFORMER

L1
(HOT)

L2

SECOND STAGE
HEAT RELAY

EM HEAT
RELAY

COOLING
CHANGE OVER
VALVE

FIRST STAGE
COMPRESSOR
RELAY

FAN
RELAY

M14767A

LEAVE FACTORY INSTALLED R

H 

TO R

C

 JUMPER IN PLACE.

1

R

C

R

H

W

1

W

2

E

B

O

Y

1

Y

2

G

PANEL

1

TRANSFORMER

L1
(HOT)

L2

SECOND STAGE
HEAT RELAY

COOLING
CHANGE OVER
VALVE

FIRST STAGE
COMPRESSOR
RELAY

FAN
RELAY

M14767A

LEAVE FACTORY INSTALLED R

H 

TO R

C

 JUMPER IN PLACE.

1

R

C

R

H

W

1

W

2

E

B

O

Y

1

Y

2

G

PANEL

1

Summary of Contents for MiniZone EMM-3U

Page 1: ...rature Sensor for capacity control with adjustable high and low limits System and Zone LEDs indicate system status Automatic zone changeover with 20 minute changeover timer Individual zone fan control Thermal circuit breaker protects panel and transformer from damage if miswired Purge timer protects equipment between calls for heating and cooling Uses spring open power closed spring closed power o...

Page 2: ...ensing Temperature Ratings Shipping 20 to 120 F Operating 40 to 150 F LED SYSTEM mode LED 5 used to communicate equipment status Red Heat Heat mode Green Cool Cool mode Yellow Purge Purge mode Green Fan Fan mode Red EM Heat Emergency Heat mode Flashing Red Heat System exceeds high DATS input Flashing Green Cool System exceeds low DATS input Flashing Yellow Purge No DATS or DATS failure Off Idle mo...

Page 3: ...nded Thermostats System Non Programmable Programmable Single Stage T87F1859 Q539A1014 T87F4010 Q539A4026 T8501D1046 T8400C1016 T8400C1040 T8400C1099 T8501D1111 T8601D2027 T8600D2069 T8600D2028 T8601D2019 T8602D2018 T8602D2000 T8000C1002 T8000C1010 T8001C1019 PC8900 W8900A C Heat Pumpb Y594R1243a c d Y594G1252a e T8411R1002 T8411R1028 T8611G2051a T8011R1006 T8011R1014 T8011F1002 Multi Stageb T8424D...

Page 4: ...ostat jumper on the EMM 3U disconnected The PC8900 can be used as a zone thermostat See Fig 4 for hookup The PC8900 with the W8900A or C controls up to 2 heat and 2 cool stages of conventional equipment The PC8900 with the W8900A also controls heat pump equipment Connect a jumper on the W8900 from Rc to Rh as shown Wire terminals R and C to a transformer Alternately if the zone control system curr...

Page 5: ... LEAVE O B JUMPER ON EMM 3U DISCONNECTED EMM 3U THERMOSTAT CONNECTORS TYPICAL SINGLE STAGE THERMOSTAT WIRING 1 2 3 3 1 R C G W2Y2 O B M6M4M1 Y1 W1 E C R L 24VAC 40VA 2 M20781A W8900A C IS RECOMMEDED FOR CONVENTIONAL AND HEAT PUMP APPLICATIONS THE W8900B CANNOT SWITCH THE PANEL TO EMERGENCY HEAT LEAVE O B JUMPER ON EMM 3U DISCONNECTED 1 2 1 S1 S T1 T OUT OUT LED G Y2 Y1 W1 W2 1 2 3 4 GND C R RH RC ...

Page 6: ...N EMM 3U DISCONNETED HEAT PUMP THERMOSTAT WITH SEPARATE W1 AND Y1 THERMOSTAT WIRING 1 2 3 1 2 EMM 3U THERMOSTAT CONNECTORS 3 R C G W2Y2 M6M4M1 Y1 C R L 24VAC 40VA O B W1 E M20783A G C R Y1 L W2 E B O COMMON C TERMINAL IS USED ONLY BY THERMOSTATS THAT REQUIRE A COMMON WIRE NORMALLY CONNECT E ON THERMOSTAT TO W1 E ON PANEL ALTERNATELY INSTALL JUMPER FROM E TO Y1 ON THERMOSTAT CONNECT O B TERMOSTAT J...

Page 7: ... a problem with the DATS sensor 3 There is a problem with the DATS wiring The zone control panel will continue to operate correctly when the purge LED is flashing but without the high and low limit protection Equipment Wiring Conventional Equipment Wire the heating and cooling equipment to the equipment terminals on the EMM 3U Panel as shown in Fig 17 Conventional Equipment Leave DIP switch 4 set ...

Page 8: ...ee Fig 17 and 18 for heat pump equipment wiring Refer to the manufacturer instructions for additional wiring details and substitute the EMM 3U equipment terminals for the thermostat terminals shown If the same heat source is used for auxiliary heat and emergency heat Connect the auxiliary heat to W2 Wire a jumper from W2 to E Set DIP switch 12 to Off If auxiliary heat is separate from emergency he...

Page 9: ...ling systems require a jumper to be installed connecting RH and RC factory installed 1 C terminal connection is not required on battery powered power stealing or some electromechanical thermostats 2 Leave jumper disconnected for conventional thermostats Discharge Air Temperature Sensor See C7735 Installation Instructions for further information R C DATS DATS OFF ON EM HEAT B O Y1 Y2 G Cooling Tran...

Page 10: ...RELAY COOLING CONTACTOR M14765A REMOVE FACTORY INSTALLED RH TO RC JUMPER 1 RC RH W1 W2 E B O Y1 Y2 G PANEL 1 TRANSFORMER L1 HOT L2 SECOND STAGE HEAT RELAY EM HEAT RELAY COOLING CHANGE OVER VALVE FIRST STAGE COMPRESSOR RELAY FAN RELAY M14767A LEAVE FACTORY INSTALLED RH TO RC JUMPER IN PLACE 1 RC RH W1 W2 E B O Y1 Y2 G PANEL 1 TRANSFORMER L1 HOT L2 SECOND STAGE HEAT RELAY COOLING CHANGE OVER VALVE F...

Page 11: ...e switches are shipped in the On Up position See Fig 13 and Tables 4 and 5 M20888 ZONE DAMPER MOTORS M1 common M4 power open M6 power closed 24 Volt Equipment MOMENTARY PUSHBUTTON SWITCHES BOOT USED TO CLEAR THE SYSTEM AND MICROPROCESSOR PURGE OVERRIDE USED TO BYPASS THE PURGE CYCLE WHILE TROUBLESHOOTING DIP Switches see Installation Instructions for details 1 2 3 Set to off for 1 stage heat and c...

Page 12: ...t a single stage thermostat see Table 1 Set DIP switches 1 2 and 3 to Off to disable the stage timer Multi Stage THERMOSTAT CONTROLLED STAGES Select a multi stage thermostat see Table 1 that energizes W2 and Y2 for second stage of heat and cool Configure DIP switches 1 2 and 3 to Off to disable the stage timer Timer Controlled Stages The panel stage timer energizes the second stage of heat or cool...

Page 13: ...or heat and the second stage of emergency heat is then W2 Multi Stage Thermostats Use multi stage thermostats to control up to two stages of heat or cool with the Y2 and W2 thermostat terminals on the panel Manual and Automatic Changeover Thermostats Manual or automatic changeover thermostats can be used The panel determines the call for heat or cool based on which was called for first Subsequent ...

Page 14: ...ontrols fan in heat Panel engages fan in heat 8 Purge Fan Purge Fan controlled by HVAC Panel engages Purge Fan 9 Purge Damper Purges into last zone calling Purges into all zones 10 Purge Time Two minutes 3 1 2 minutes 11 EM Heat Fan HVAC controls fan in EM heat Panel engages fan with heat 12 2nd Stage Em Heat Yes No Table 5 Stage Timer Configuration Time Minutes DIP Switch 1 DIP Switch 2 DIP Switc...

Page 15: ...r W1 G on the thermostat If there is voltage there then it is a bad Y or Y1 or O B if you are using O B wire If no voltage at R any other terminal on the thermostat then it is a bad R wire Jumper the R wire to the Y or Y1 and O B if you have a wire on O B wire on the thermostat If the COOL light comes on you have a bad thermostat Replace thermostat If you jumper R Y or Y1 on the thermostat and the...

Page 16: ... R G on the thermostat If there is voltage it is a bad W or W1 or B if you are using B wire If there is no voltage at R any other terminal on the thermostat it is a bad R wire Jumper the R wire to the W or W1 and O B if your thermostat uses it for heat changover wire on the thermostat If the HEAT light comes on you have a bad thermostat Replace thermostat If you jumper R W or W1 and O B if you hav...

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