EZ Zone/Meridian
Upgrade 5
036-21423-001 Rev. A (0602)
The basic steps required to upgrade your EZ
Zone system to a Meridian system are:
Determine what EZ Zone components
are currently installed on the system.
Replace the existing EZ-Zone Master
Controller board with an Meridian
Zone Manager controller board
Replace the existing EZ Zone
EPROM’s in each Zone Controller
with a new Meridian EPROM.
Install return air and outside air
temperature sensors
EZ Zone to Meridian upgrade allows you to
retain:
All existing wiring
Master Controller enclosure with
keypad and display
Existing supply air and static pressure
sensors
Existing bypass damper
All Zone Dampers
* All Zone Controllers
Room sensors
* Modem Linc Central
* All Master Interface Boards
All Fan Terminal Controllers
EZ Zone Upgrade Overview
After upgrading your system from EZ Zone to
Meridian, you will be able to take advantage
of many new enhancements including:
Damper actuators can be programmed
for direct or reverse operation
Full modulating economizer control
capability including optional wetbulb
economizer control
Outside air temperature sensor provides
lockout function for both heating and
cooling. When converted to Meridian
Plus system only one outside air sensor
is required for the entire system
Contact closure input for dirty filter
status
Global and individual zone override
modes
Zones can be set for voting or
nonvoting status
Room sensor slide can be programmed
± 0° F to ± 5° F adjustment
from setpoint
Staging delays, minimum off times,
and changeover intervals are
programmable
Sensor offset calibration to correct
sensor errors due to poor location
MeridianView enhanced graphical
computer front end software available
when CommLink and a PC are used
System Manager operator interface
allows all controllers to be accessed from
one central location
* These controllers can be retained but they will re-
quire an EPROM chip upgrade to be compatible
with the Meridian System.
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