Submittal Sheet

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. On a call for heating or
cooling, the panel will accept the first call from any zone. Upon
accepting this call the MMP3 will keep open the damper(s) to the zone
calling, close the damper(s) to those zones not calling, activate the
needed HVAC controls for heating or cooling, whichever is being
called and not accept any calls for the opposite mode.
Any calls for the opposite mode will be locked out until the initial
mode is either satisfied or a period of time has elapsed that is sufficient
for the first mode to satisfy, a maximum of 20 minutes. A Patent
Pending sequence determines the time the unit has been running or
needs to continue to run in order to adequately provide conditioning
for each mode. If a particular mode has already been calling for 20
minutes or longer and an opposite call comes in the MMP3 will
immediately drop the mode, enter the purge mode in order to dissipate
the conditioned air into the zones calling before switching over to
provide the new conditioning call to its zones.
PURGE TIME
Once a call is satisfied the MMP3 drops the call for the heating or
cooling unit controls, whichever was calling and hold the damper(s) to
the zone(s) that were last calling during the Purge Mode. The Purge
mode is nominally 2 minutes and allows the excess conditioned air in
the plenum to be distributed only to the zone(s) that were last calling.
This eliminates the problem of overshooting the temperature in the
satisfied zones.
During the Purge mode the panel can be set to keep the Fan running
during Purge or to let the fan control in the HVAC unit to control the
fan. By using the FIPG (Fan On-In Purge) jumper, on the top right
corner of the control panel, this keeps the fan running until the Purge
mode is over. This mode avoids the fan shutting off during the Purge
mode and coming back on when another zone may be on constant fan
after the Purge Mode is over. This may be more often used in
commercial applications for continuous air circulation (CAC). In
residential applications the fan remaining on, especially in heating, may
be drafty and objectionable.
Once all zone thermostats are satisfied for heating and cooling, the
MMP3 can now accept Fan calls allowing Continuous Air
Circulation(CAC) in those zones where the thermostat’s Fan Switch is
set to ON. These zone dampers will be OPEN while the dampers to
the zones where the Fan Switch is set to AUTO will be CLOSED.
When all zone thermostats are satisfied for both Heating and Cooling,
and all Fan switches are set to AUTO position, the HVAC unit will be
off and all zone dampers will return to a normally open position. Once
a zone calls for heating, cooling or fan, the dampers to the calling
zones remain open and the dampers to the zones not calling will close.
HVAC Equipment Set-Up
The MMP3 is factory set for conventional fossil fuel (oil or gas) single
stage heating and cooling. The panel only needs to be configured
when using with a conventional electric furnace or hydro-air system in
order to bring the fan on with a call for heat.
By using the FIH (Fan On-In Heat) jumper, located on the upper right
corner of the board, this allows the Fan to be activated with a call for
heat. Once the heat call is satisfied the fan will shut off as well, as long
as the FIPG jumper is off as well.
Other jumpers on the panel are for NO SENSOR and LOW LIMIT. The
NO SENSOR jumper must be on to jumper the pins when no sensor is
used. The LOW LIMIT jumper is OFF for a Heating limit of 170°F and
ON for a higher heating limit temperature 180°F.
CHANGEOVER TIMER
Whenever a call is made for either heating or cooling, the changeover
timer is activated in order to track the amount of time heating or
cooling is on. When an opposite call is made after a first call is existing
the changeover timer calculates the amount of time the unit has
already been supplying the first mode in order to determine how long
it will hold off the opposite call. If an opposite call is made shortly after
the first call, the opposite call may be held off for as much as 20
minutes. If the first call or subsequent calls for the first call mode has
had that mode operating for up to 20 minutes already and an opposite
call comes in after 20 minutes, the changeover timer will immediately
recognize the opposite call, shutting off the current mode, enter the
purge mode and automatically switch to the opposite mode.
The longer a call has been running up to 20 minutes, the shorter the
wait time will be for an opposite call. If a call is over 20 minutes and
an opposite call is made the changeover will be immediate following
the purge time. This intelligent changeover timing makes the MMP3
unique to any other zoning system.
CHECKOUT
The MMP3 has unique features that simplify the checkout of the
system and has LED readouts that constantly indicate the system
operation. Once 24 Volt Power is applied to the panel the Green
Power LED will illuminate. This will stay illuminated constantly when
power is applied.
The System LED will provide several different indications based upon
color and if it is flashing.
Heat ON – RED
Heat Over limit – RED Flashing
Cool ON - GREEN
Cool Over limit – Green Flashing
FAN ON - AMBER
PURGE - AMBER Flashing
Each zone has its own small Green indicator LED next to each zone
relay. This light is lit whenever the zone damper is to be open, either
on a call or when all zones are satisfied.
WIRING
The MMP3 is very simple to wire and requires only a minimum number
of connections. The MMP3 terminal blocks are screw-less and all wires
can easily be pushed into their respective terminal by de-pressing the
button for each point and releasing once the wire is seated. To
remove the wire, just press its button again and remove the wire.
Zone Dampers – The MMP3 powers only the 12VDC plug-in dampers.
Each damper comes with a modular cord and plugs (RJ11) already
installed to allow each zone damper to just plug into the MMP3 panel.
Additional dampers can be slaved to one another by using the splitter
included with each damper. Additional dampers are connected via
each splitter to “daisy chain’ from one damper to the next. A
maximum of 10 dampers per zone is recommended.
Upon installation it is recommended that as each motor is connected
that each motor is cycled, before connecting the next motor, to insure
proper operation of that motor and to minimize troubleshooting
looking for a possible bad motor or wire connection.
Zone Thermostats – The thermostats wiring will for single stage can be
four or five wire. The fifth wire being the C-Common terminal for 24
Volt powered thermostats. There are 5 terminals on the MMP3 for
each thermostat, marked Y-G-R-W-C. This wiring is shown on Wiring
Diagram 1 for single stage thermostats.
Form 2263-0710 MMP3 Installation and Operating Instructions
© Copyright Trolex Corporation & ZoneFirst