Submittal Sheet
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.
Transformer Wiring
24V TRANS
C
R
C
R
T24 -24V 40VA
TRANSFORMER
Zone Thermostat Wiring
G
Y
R
W
C
ZONE THERMOSTAT
G
Y
R
W
C
70°
ZONE THERMOSTAT
Plug-In Damper Wiring
To Additional Dampers
Up to 10 Per Zone, if used.
Zone Damper
Connector on
Zone Panel
NOTE: It does NOT matter which jack on damper
goes to the panel or additional dampers.
PLUG-IN ZONE DAMPER
25 Foot Modular Cord
(Provided with each damper)
HVAC Equipment Wiring
Y COMPRESSOR RELAY
G FAN RELAY
W HEAT RELAY
R 24V. TRANSFORMER C
FURNACE CONTROLS
OUTDOOR CONDENSING UNIT
Y
G
W
R
EQUIPMENT
Zone Plenum Sensor
The Zone Mix-Air Sensor, Model ZPS, is a remote sensor that is located
in the supply air duct to sense the leaving air temperature of the HVAC
Unit. The ZPS is a high limit protection for the heating and a low limit
protection for the cooling. When zoning, the airflow through the
HVAC Unit is critical. The LAS protects the equipment in low air flow
situations as well as when by-pass air is being directed back into the
return air duct.
The heating limit is fixed at 180F. The cooling limit is fixed at 40F.
When the ZPS senses heating above its set point, or cooling below its
set point, the MMP3 will drop both stages of heating or cooling. The
ZPS must sense a 10F fall for heating or rise for cooling before re-
activating the first stages of heating or cooling. If two stage heating or
cooling is being used the second stage timer will start again once the
first stage is re-activated.
The ZPS requires 2 wires from the sensor to the LAT terminals on the
MMP3 panel. The ZPS probe can also be adjusted for length by
loosening the end nut and sliding the probe thru the mounting plate in
order for the probe to pass through any duct insulation
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
NOTE: If the ZPS is not used, the NO SENSOR jumper located just
above the LAT terminals must be on the pins.
After installing the ZPS, use the chart supplied with the ZPS to check
the Ohm reading for the apropraite duct temperature.
TROUBLESHOOTING
The MMP3 is a very simple control to troubleshoot, especially with the
LED indicators. The only other device needed is a simple Volt/Ohm
meter.
Almost all problems can be traced to an external component or wiring
to the MMP3. While the MMP3 has been designed to operate under
extreme voltage conditions and is fuse protected, like any computer
the micro-processor can hang up and not operate properly. For these
instances a BOOT button has been installed that re-boots the micro-
processor just like your computer. Pressing this button for a few
seconds and then release it will allow the micro-processor to re-boot
and in most all cases eliminate the problem. If not the following
procedure can help isolate the problem.
If the BOOT Button does not resolve the problem, turn off the power
to the panel for several seconds until the LEDs got out and then turn
the power back on to see if the panel resets. In many instances this
resolves the problem.
The first check is for 24VAC Power to the panel. When there is power
the Green Power LED will be lit. If not check the transformer and the
power supply to it.
BOOT
Form 2263-0710 MMP3 Installation and Operating Instructions
© Copyright Trolex Corporation & ZoneFirst