EZ Zone/Meridian
12
Upgrade
036-21423-001 Rev. A (0602)
Example #3:
Your project has a Networked EZ Zone System that you
want to convert to the Meridian Plus system. Please see
the required upgrade components list below for the
necessary parts to be ordered.
To upgrade your existing Networked EZ Zone System
to the Meridian Plus System the following procedures
will be required.
Warning: All removal and installation procedures
must be done with the power to the controllers
turned off. Failure to do so can cause severe dam-
age to the controller boards.
1) All power and input/output wiring will need to be
disconnected from the existing Master Controller board.
Disconnect the keypad & display cable from the board
by unplugging its connector from the board.
2) The new Return Air Sensor should be installed in
the return air stream in a location upstream of the point
that the bypass duct connects to the return duct.
3) Install the new Outdoor Air Sensor in a location on
the exterior of the building that provides shade and
protection from the weather. Only one OA sensor is
required for the entire system. See the mounting instruc-
tions included with the sensor for detailed mounting
instructions.
4) Take the cover off of the Modem Link Central, re-
move the old EPROM and replace with the new
CommLink EPROM. See Figures 14 & 17 on pages 25
& 27 for detailed EPROM installation instructions.
5) Remove the existing EZ Zone Master Controller
Board from the EZ Zone enclosure. This will require
the removal of 4 screws securing the board to the en-
closure base. Remove the existing Master Interface
Board from the old Master Controller board. Remove
the old EPROM from the Master Interface board and
install the new MiniLink upgrade EPROM to the Mas-
ter Interface board. See Figures 15 & 17 on pages 26 &
27 for detailed EPROM installation instructions.
6) Install the upgraded Master Interface board to the
new Zone Manager board using the existing mounting
hardware. Install the new Zone Manager board onto the
existing enclosure base. The new Zone Manager board
installation requires 6 plastic standoffs be inserted be-
tween the back of the new board and the existing stand-
offs. Secure the board to 4 of the threaded standoffs
(one in each corner of the board) with the screws that
were included with the new Zone Manager board.
7) Connect the input, output and power wiring per the
Meridian Plus wiring diagram (See Figure 3 on page
18). Connect the existing 3 Connector Ribbon Cable
keypad display connector to the existing EZ Zone en-
closure cover and to the new Meridian Zone Manager
board (See Figure 18 on page 30). Secure the existing
enclosure cover to the enclosure base with the existing
screws.
8) Remove and replace each EPROM on all the exist-
ing EZ-Zone Zone Controllers. See Figures 16 & 17 on
pages 28 & 29 for detailed EPROM Replacement in-
formation.
To Upgrade To The Meridian Plus System Order the Following
:
(X)
(2ZZC004708124) EZ Zone to Meridian Basic Upgrade Kit (One Required Per Existing Master
Controller) (Includes: Zone Manager Board w/ Mounting Screws, Plastic Standoff Kit for Zone
Manager, Return Air Sensor, Upgrade Label, Installation Instructions)
(1)
(2ZZC004708424) Modem Linc Central to CommLink II Upgrade Kit
(Includes: ComLink EPROM Upgrade Chip, Upgrade Label)
(1)
(2ZZC004708524) Master Interface Board to MiniLink Upgrade Kit
(Includes: MiniLink EPROM Upgrade Chip, Upgrade Label)
(1)
(2ZOT004704424) Outside Air Sensor (Only One Required Per System)
(X)
(2ZZC004708224) EPROM (Replaces EZ Zone, Zone Controller EPROM) (One Required Per
Controller)
(1)
(2ZSM004702924) System Manager (Not Required if Using Optional Computer)
Note: When ordering be sure to specify Fahrenheit or Celsius operation for your system
For optional components list and information see pages 14 & 15 of this manual.
