White Rodgers CZ-4, CZ-4K Installation Instructions
CZ-4 & CZ-4K Zoning Panel
Installation & Operating Instructions
Product Data
• Single Stage gas and electric systems
• Multi Stage (2H/2C) gas and electric systems
• Heat Pump (3H/2C)
• 4 zones (use CAZ-2 for additional zones up to 32 total)
• 5-Year Warranty
Specifications
• Construction: ABS Plastic
• Dimensions: 7 ⅝” x 7 ¼” x 1 ⅜”
• Voltage: 24 Volts AC, 50/60 Hz
• Operating Temperature: 0°- 120°
• Shipping/Storage Temperature: -20°- 140°
• Humidity Range: 5% - 95% Non-Condensing
Kit Contents (CZ-4K)
• CZ-4
• CLAS (leaving air sensor)
• 24V Transformer
Recommended Dampers
• CRDS – round damper (24V)
• CZDS – rectangular, side mount motor (24V)
• CZDB – rectangular, bottom mount motor (24V)
• CSPRD – static pressure relief dampers
24V dampers are power close, spring open and are
convertible to power open, spring close
Recommended Thermostats
• 1F78-151 (5+2 programming)
• 1F78-144 (non-programmable)
• 1F85-0471 (5+1+1,5+2,0 programming)
• 1F80-0471 (5+1+1,5+2,0 programming)
• 1F97-1277 (7, 5+1+1,0 programming)
• 1F95-1277 (7, 5+1+1,0 programming)
• 1F85RF-275 (5+1+1,5+2,0 programming) (wireless)
Terminal
Destination
W2/E….…… 2nd Stage Heat (Emergency heat for Heat Pumps)
G…………… Fan Relay
Y…………… Compressor
R…………… Power for Heating/Cooling
W/OB……… Heat Relay/Changeover Valve for Heat Pump
C…………… Common Wire
Description
To prevent electrical shock and/or
equipment damage, disconnect electric
power to system at main fuse or circuit
breaker box until installation is complete
SAVE THESE INSTRUCTIONS FOR
Failure to read and follow all instructions
carefully before installing or operating
this control could cause personal injury
and/or property damage.
FUTURE USE!
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© 2004 White-Rodgers by Permission
Form 37-6864A
Adj
ustable Stage Timer
System Mode Indicator
Zone Terminal
Blocks for Zone
Thermostats & Zone
Dampers
Mounting Keyholes
Two at Top also.
Table of Contents
Installation 2
Operation 2-3
Set-Up for
Various HVAC Equipment 3
Leaving Air Sensor Air Sensor 3-4
Timers 4
ZoneAdder™
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 panel is 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 in 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 stage 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
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© 2004 White-Rodgers by Permission
Power Indicator LED
Adjustable
Heating
Limit
Additional Zones
(CAZ-2 panel) RJ-11
Connection
CLAS and COAS
Terminal Blocks
HVAC
Equipment
Connections
24V Transformer
Terminal Blocks
Automatic Resetting
Fuse
Form 37-6864A
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