Honeywell MiniZone EMM-3U Product Data
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Honeywell MiniZone EMM-3U Product Data

Universal electronic minizone panel
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APPLICATION

The EMM-3U Universal Electronic MiniZone™ Panel controls
single-stage, multi-stage, conventional or heat pump heat/cool
equipment and is used on two- and three-zone applications.
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
Electronic MiniZone™ Panel

FEATURES

• Compatible with single-stage, multi-stage,
conventional or heat pump applications.
• Uses virtually any Honeywell four-wire, single-stage,
multi-stage, or Trol-A-Temp heat pump thermostat.
• Optional Discharge Air Temperature 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-
open, and power-open/power-closed dampers.
• Single or dual transformer equipment compatible.
For Internet access:
www.honeywellzoning.com
For technical support, call 1-800-828-8367.
To download Zoning literature: http://hbctechlit.honeywell.com
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Troubleshooting ................................................................ 15
EMM-3U Universal
PRODUCT DATA
Contents
1
1
2
2
4
68-0237-2

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Summary of Contents for Honeywell MiniZone EMM-3U

  • Page 1 • Uses spring-open/power-closed, spring-closed/power- open, and power-open/power-closed dampers. APPLICATION • Single or dual transformer equipment compatible. The EMM-3U Universal Electronic MiniZone™ Panel controls single-stage, multi-stage, conventional or heat pump heat/cool equipment and is used on two- and three-zone applications. For Internet access: www.honeywellzoning.com...
  • Page 2 1985 Douglas Drive North Golden Valley, MN 55422 In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
  • Page 3 EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL Recommended Dampers (See Table 2): Five ZD or ARD dampers maximum connected to each panel and a maximum of five dampers per zone. Table 1. Recommended Thermostats. Use SDCR for additional dampers required on one zone.
  • Page 4 5 - 60 minute timer. If the equipment is a Mount only on wall or on cold air return. heat pump, the EMM-3U panel controls the reversing valve. If 1. Mount the thermostats in each zone of the living space the thermostat has a common terminal, it is wired to C on the panel, see Fig.
  • Page 5 COMMON (C) TERMINAL IS USED ONLY BY THERMOSTATS THAT REQUIRE A COMMON WIRE. MULI-STAGE THERMOSTATS ARE WIRED SIMILARLY BUT WITH Y2 AND W2 USED FOR SECOND STAGE COOL AND HEAT. LEAVE O/B JUMPER ON EMM-3U DISCONNECTED. M20780A Fig. 3. Typical conventional thermostat wiring. 24VAC...
  • Page 6 NORMALLY, CONNECT E ON THERMOSTAT TO W1/E ON PANEL. ALTERNATELY, INSTALL JUMPER FROM E TO Y1 ON THERMOSTAT. Fig. 5. Heat pump thermostat with separate W1 and Y1 CONNECT O/B TERMOSTAT JUMPER ON EMM-3U PANEL IF terminal wiring. USING O FROM THERMOSTAT; DISCONNECT IF USING B.
  • Page 7 Wire the heating and cooling equipment to the equipment controlled as two-position devices on the EMM-3U Panel. terminals on the EMM-3U Panel as shown in Fig. 17. Multiple dampers can be wired in tandem. Conventional Equipment: Leave DIP switch 4 set to On.
  • Page 8 Wire a dedicated transformer to the R (hot) and C (common) substitute the EMM-3U equipment terminals for the terminals on the zone control panel as shown in Fig.13. One thermostat terminals shown.
  • Page 9 RELAY LEAVE FACTORY INSTALLED R TO R JUMPER IN PLACE REMOVE FACTORY INSTALLED R TO R JUMPER. FOR SINGLE TRANSFORMER SYSTEM. M14764A M14766A Fig. 14. Conventional single-stage single transformer Fig. 15. EMM-3U oil heating wiring diagram. system wiring diagram. 68-0237-2...
  • Page 10 EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL PANEL PANEL HEATING TRANSFORMER (HOT) TRANSFORMER (HOT) HEAT SECOND STAGE RELAY HEAT RELAY COOLING COOLING CHANGE OVER TRANSFORMER (HOT) VALVE FIRST STAGE COOLING COMPRESSOR CONTACTOR RELAY RELAY RELAY REMOVE FACTORY INSTALLED R TO R JUMPER.
  • Page 11 M6 - power closed Damper Motors) M20888 Fig. 19. EMM-3U with Air Conditioning Zoned with Dampers and Hydronic Heat Using V8043 Zone Valves. STARTUP AND CHECKOUT 5. Verify that the heat LED is red and the zone one damper remains green while the other damper LEDs turn off.
  • Page 12 • Configure DIP switches 1, 2 and 3 to Off to disable the stage timer. • When there is no call for heat, cool, or fan, the EMM-3U is in the Idle mode. No system LEDs are illuminated and the Timer Controlled Stages damper LEDs are green to indicate open.
  • Page 13 Y1 and W1 can To reset the panel, press and release the Boot button. The be used with the EMM-3U. Thermostats of either type can be system reboots and enters the Purge mode.
  • Page 14 EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL Table 4. DIP Switch Settings and Functions. DIP Switch Function On (Default) Stage Timer See Table 5. Stage Timer See Table 5. Stage Timer See Table 5. System Type Conventional Heat Pump DATS High Limit...
  • Page 15 EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL TROUBLESHOOTING The primary diagnostic tools are the System and Zone damper status LEDs and BOOT and PURGE OVERRIDE buttons. See Fig. 20 and 21 for troubleshooting flowcharts. Start The board may have been damaged. Take the transformer R wire off again Is there for 10 minutes.
  • Page 16 EMM-3U UNIVERSAL ELECTRONIC MINIZONE™ PANEL Start The board may have been damaged. Take the transformer R wire off again Is there for 10 minutes. After 10 minutes re- 24 vac at R and C on Check the transformer attach that R wire and press the BOOT the transformer for 24 vac.

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