Specifications

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Specifications:
MZA2
MasterZone
TM
/ ZONE ADDER for the MZS (2-Zone)
Description:
x Two Zone Expansion Panel
x Modular Jacks for Easy Add-On Connection
x Screwless Terminal Blocks
x Individual Zone Indicating Lights
x Indicator LEDs for System Operation
Features:
The MasterZone™ Zone Adder (MZA2) Panel is a 2
zone expansion panel used to add zones onto an
MZS4 Zone Control Panel. The MZA requires its own
separate 24 Volt AC transformer. The panel also
includes a modular jack cord which connects the MZA
with the main MZS panel. The MZA is NOT a stand
alone zoning panel and is used only as an expansion
panel for one or two additional zones when using the
MZS4 as the main zoning panel.
The MZA2 operates and wires similarly to the MZS4
except for the HVAC Equipment connections and
Leaving Air Sensor.
When either zone thermostat calls, for either Cooling
or Heating, the MZA2 panel will take the call and look
at the MZS4 status. If there are no other calls, it will
open the damper to that zone, if not already open,
close the dampers to the zones that are not calling
for the same mode and activate the appropriate
heating or cooling on the HVAC Unit. If other zones
call for the same mode, the MZS panel will allow
these calls and open these zone dampers until all
zones are satisfied, unless there are calls from other
zones for the opposite mode.
x Construction: ABS plastic
x Number of Zones: 2 Expansion
x Dimensions: 7-5/8”x 7-1/4” x 1-3/8”
x Voltage: 24 Volts AC, 50/60 Hz
x Temperature Rating: 0°F to 120°F Operating,
-20°F to 140°F Storage
x Humidity: 5% to 95% Non-Condensing
x Connection: Screwless push-in terminal blocks
174007 EA 1
MZA2 ZONE ADDER 2-Zones
ACE # PK UM DESCRIPTION