User Guide
TECHNICAL BULLETIN
Models ZXM2 Expansion Modules
TB-223
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
Patent Pending
Leave this bulletin on the job site for future reference!
The advanced ZXM2 Expansion Module allows you to easily add additional zones to the UZC4 Zone Control
System. You can gain up to 16 additional zones for a total of 20. The robust and superior design, intuitive firmware,
simple setup options, and easy to understand wiring, makes the UZC4 Zoning system the Contractors dream.
Combined with EWC motorized dampers and practically any off-the-shelf heat/cool, heatpump or Multistage
thermostat, EWC Controls once again proves to be the innovative leader in the residential & light commercial
Forced Air Zoning industry.
P/N 090375A0223 REV. C
Copyright 2005-2008 EWC Controls Inc., All Rights Reserved ©
C
W1
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M6
M4
M2
M1
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M4
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P
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R
MXR
MXC
F1
TB1
TB2
TB3
TB4
TB5
DMPR
STATUS
LED1
LED2
LED3
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A
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U6
U1
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ZXM2
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POLARIZED
ISOLATING
DAMPER
POWER
TERMINAL
BLOCK &
2.5 amp
BREAKER
Rugged
Damper
Motor
Terminal
Blocks
with
ZONE ID
blocks
Heavy
duty
10 amp
contact
rated
relays
Rugged 10 pin
Expansion Header
Rugged &
Versatile
Thermostat
Terminal
Blocks
4 Switch ZONE
ADDRESS Bank
Bright STATUS LED
and DAMPER LED’S
with ZONE ID blocks
FIELD
ZONE ID
Blocks
Bus Cable not shown for clarity
Model ZXM2 Expansion Module
The ZXM2 Expansion Module can
add up to 16 zones with 1 to 8
expansion modules on a UZC4
control system.
Compatible with most Off the shelf
1 or 2 stage Conventional
H e a t / C o o l o r H e a t P u m p
Thermostats. All Mechanical,
Digital/Electronic, Dual Mode, and
Internet Compatible Thermostats
that operate on 24vac. Battery
powered or Power robbing
thermostats that draw less than 20
ma of current are also accepted.
The ZXM2 Expansion features
automatic changeover from any
thermostat allowing for individual
zone comfort from the HVAC
system.
The STATUS LED pulses as a
steady heart beat to indicate active
Micro- processor status.
LEDs indicate which dampers are
o p e n .
Zone
Capacity
Compatible
Thermostats
Automatic
Heat/Cool
Changeover
Status LED
Damper LEDs
Operating
Conditions
INPUT VOLTAGE:
PANEL: 19-30VAC 60 Hz, Supplied via
bus cable from UZC4.
DAMPERS: 19-30VAC 60 Hz,
Transformer 40-60VA Max. NEC Class 2.
CURRENT DRAW: Max 8VA @ 24VAC.
OVER-CURRENT PROTECTION:
PANEL: 4.0 amp or 96VA. Protected
via UZC4.
DAMPERS: 2.5 AMP or 60VA
TEMPERATURE: -20° to 160°F (-29° to 71°C)
HUMIDITY: 0% - 95% RH Non-Condensing.
Operating
Power