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MODEL 6404 ZONED COMFORT CONTROL PANEL
Model 6404 Zoned Comfort Control Panel
EVERY JOB IS DIFFERENT
Aprilaire offers flexibility for all your zoned comfort control applications by providing you
with all the features you demand.
Accounting for excess system pressure is a requirement of any zone control system and we
know there are many options for pressure relief. That is why Aprilaire supports all the popular
options. You can choose from Aprilaire’s exclusive ‘Controlled Pressure Relief’ method (which
requires no bypass damper), using a bypass damper along with plenum temperature control,
or the oversized ductwork method. (See our design guide for details.)
THE QUALITY AND SUPPORT OF APRILAIRE
The Model 6404 Zoned Comfort Control panel offers you the quality and support you’ve come
to expect from Aprilaire. You can count on 24-hour shipping, great technical and sales support
and the most reliable dampers on the market.
MODEL 6404
SINGLE OR MULTI-STAGE HEAT/COOL OR HEAT PUMP
4-ZONE CONTROL PANEL EXPANDABLE TO 12 ZONES
CONSUMER BENEFITS
CONTRACTOR BENEFITS
ANY ZONE SETS MODE
PLENUM TEMPERATURE CONTROL (ADJUSTABLE)
• Protects equipment from excessive high and low temperatures
caused by reduced airflow or bypassing to the return
• Provides true independent control for each zone
CONTINUOUS FAN BY ZONE
• Individual zone thermostats can call for fan operation
SINGLE CONTROL FOR ALL EQUIPMENT TYPES
• Operates single or multi-stage heat/cool or heat pump systems
up to 12 zones
VACATION OPERATION
• Allows system to operate in setback from the thermostat designated
Zone 1 when leaving for extended periods
THERMOSTAT FLEXIBILITY
• Use single or multi-stage heat/cool or heat pump thermostats
depending on the application. Simple 4-wire heat/cool thermostats
can control any type of equipment.
ZONE CHANGEOVER BASED ON TIME
• If calls for opposite modes exist, the control panel will alternate to
satisfy each call
LED STATUS INDICATORS (VISIBLE THROUGH COVER)
LED STATUS INDICATORS
• Simplifies start up and troubleshooting
• Visible through the cover, these allow your customer to aid in
troubleshooting
SELECTABLE STAGING OPTIONS
• Stage by time, thermostat input or number of zones calling
FAN PURGE
• Assures air is directed to last zone(s) calling
TIME DELAY OVERRIDE
• Speeds checkout for the installer
SHORT CYCLE PROTECTION
• Protects the HVAC equipment from too frequent cycles
WORKS WITH 2 OR 3 WIRE DAMPERS
• Compatibility if you are changing out an old panel with 3-wire
dampers
MAINTENANCE FREE
• No maintenance or adjustments needed after installation
ADJUSTABLE PURGE TIMING
• Compatibility with all brands of equipment
ACCESSORY TERMINALS
• Auxiliary output relays available to control humidifiers, electronic air
cleaners or other accessories tied to heat or blower operation
DUAL FUEL OPERATION
• Control of heat pumps with fossil fuel auxiliary heat
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