MINI-MASTERZONE ZONING SYSTEM – 3 Zones ™ MMP3 For Plug-In Damper Motors Controlling Your Comfort Room by Room
MINI-MASTERZONE ZONING SYSTEM – 3 Zones ™ Features System Mode Indicator LED Power Indicator LED Fan Operation, Sensor and Low Limit Jumpers Leaving Air Sensor Terminals Boot Button 24VAC Transformer Terminals Re-Settable Fuse HVAC Equipment Connections Zone Thermostat Terminals Zone Damper Plug-In Connectors Zone Calling/Damper Indicators Table of Contents Installation ……………………………………………………….2 Operation ………………………………………………………..2-3 HVAC Equipment Set-Up…………..…………………….3 Checkout..
used. The LOW LIMIT jumper is OFF for a Heating limit of 170°F and ON for a higher heating limit temperature 180°F. OPERATION The MMP3 controls single stage heating and cooling HVAC Equipment. The MMP3 is compatible with any standard single stage thermostat and setback thermostats as well. The MMP3 has various features that make installation and checkout very simple for all of the board’s functionality. The MMP3’s basic function is zone control.
HVAC Equipment – The HVAC equipment will follow Wiring Diagram 2 for Single Stage Systems. The MMP3 can also control Heating Only and Cooling Only as well as both Heating and Cooling. Transformer – A separate 24 Volt AC, 40VA Transformer is recommended to power the control panel and dampers. Often the transformer on the HVAC unit only has enough power for its own controls. Therefore it is recommended a separate transformer be used to power this panel and the dampers wired to it.
Zone(s) Not Calling Each zone has a Green LED next to the zone relay when it is calling. The LED being lit shows that the call is being recognized by the MMP3. If a zone is supposed to be calling and the Zone LED is not on, check for 24VAC across the thermostat terminal C and the Y, if a Cool call, W if a Heat Call, or G if a Fan call. If there is no voltage here at the panel the panel is not getting the signal from the thermostat. The problem is mis-wiring, a broken wire or a problem in the thermostat.
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