FORM 2045-2 1306 ©2013 White-Rodgers by Permission
37-6864B
1
CZ-4 ZONING SYSTEM FEATURES
Table of Contents
Installation 2
Operation 2-3
Set-Up for Various
HVAC Equipment 3
Leaving Air Sensor 3-4
Timers 4
ZoneAdder 4
Checkout 4
Wiring 4-5
Troubleshooting 5
Wiring Diagram 6
INSTALLATION
The CZ-4 is a four (4) zone control panel that controls up to four
zones of heating and cooling. The CZ-4 panel is the central control
panel that all zone dampers, zone thermostats, HVAC Equipment,
power transformer, Leaving Air Sensor and ZoneAdder
™
panels are
wired.
When installing the CZ-4 panel it is important to pick a central location
where it is most convenient to bring all the wires. Most often this is at
the furnace or air handler. It is often the most convenient location
and closest to power, the HVAC unit controls and the zone dampers
when typically located at or near the plenum.
The CZ-4 case and cover are made of sturdy ABS plastic and can be
mounted to any flat surface. It is recommended that the panel be
mounted to a wall or return plenum and NOT on the furnace or
plenum where it will be in contact with the hot temperatures. The
panel can be located in an attic space or in an enclosed cabinet of a
rooftop unit, in order for the panel to be out of direct exposure to the
elements.
The cover easily removes from the case by pulling firmly and
separating the cover from the case exposing the circuit board. There
are 4 key-hole mounting points in each corner of the case. The case
has openings in the rear of the case as well as the side for all wiring.
Wiring can come from the back as well as the side in order to make a
neat installation.
OPERATION
The CZ-4 can control various types of HVAC Equipment all from the
same panel. The CZ-4 features allow the use of single stage
thermostats to control up to three stage heating and two stages
cooling and simple heat pump thermostats to control heat pumps.
The CZ-4 has various features that make installation and checkout
very simple for all of the board’s functionality.
The CZ-4’s basic function is zone control. On a call for heating or
cooling, the panel will accept the first call from any zone. Upon
accepting this call the CZ-4 will open the damper(s) to the zone(s)
calling, close the damper(s) to those zones not calling, activate the
needed HVAC controls for heating or cooling, whichever is being
called and not accept any calls for the opposite mode.
Zone Terminal Connections
for Zone Thermostats
& Zone Dampers
24VAC
Transformer
Terminals
Automatic
Resetting Fuse
Zone Calling
Indicators
Mode DIP
Switches
HVAC
Equipment
Connections
Leaving Air Sensor
(CLAS) Terminals
ZONE ADDER
(CAZ-2 panel)
RJ11 Connection
Adjustable
Heating Limit
Mounting
Keyholes
Two at Top
also.
Adjustable Second
Stage Timer
Power Indicator
LED
Boot Button
System Mode
Indicator LED
Purge Override
Button
No Sensor Jumper
