AprilAire 6404 - Manual

MODEL 6404 ZONED COMFORT CONTROL PANEL

Model 6404

Zoned Comfort Control Panel

ANY ZONE SETS MODE

• Provides true independent control for each zone

CONTINUOUS FAN BY ZONE

• Individual zone thermostats can call for fan operation

VACATION OPERATION

• Allows system to operate in setback from the thermostat designated

Zone 1 when leaving for extended periods

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 the cover, these allow your customer to aid in

troubleshooting

FAN PURGE

• Assures air is directed to last zone(s) calling

SHORT CYCLE PROTECTION

• Protects the HVAC equipment from too frequent cycles

MAINTENANCE FREE

• No maintenance or adjustments needed after installation

PLENUM TEMPERATURE CONTROL (ADJUSTABLE)

• Protects equipment from excessive high and low temperatures

caused by reduced airflow or bypassing to the return

SINGLE CONTROL FOR ALL EQUIPMENT TYPES

• Operates single or multi-stage heat/cool or heat pump systems

up to 12 zones

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.

LED STATUS INDICATORS (VISIBLE THROUGH COVER)

• Simplifies start up and troubleshooting

SELECTABLE STAGING OPTIONS

• Stage by time, thermostat input or number of zones calling

TIME DELAY OVERRIDE

• Speeds checkout for the installer

WORKS WITH 2 OR 3 WIRE DAMPERS

• Compatibility if you are changing out an old panel with 3-wire

dampers

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

CONSUMER BENEFITS

CONTRACTOR BENEFITS

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

®