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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

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

CONTRACTOR BENEFITS

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

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

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

APRILAIRE MODEL 6404 ZONED COMFORT CONTROL PANEL

Y

O

G

2S

R

C

W

R

C

W

Y

B

O

G

2S

Y

O

G

2S

R

C

W

Y

O

G

2S

R

C

W

B

O

W2

Y2

W1

Y1

G

RH

RC

WIRING DIAGRAM

ZONE 1

COM NC NO

ZONE 2

COM NC NO

ZONE 3

COM NC NO

ZONE 4

COM NC NO

DAMPER

POWER

C R

CONTROL

PANEL

POWER

R C

HUM EAC

R

EP_OUT

C A B

T.D.O.

(TIME DELAY

OVERRIDE)

ZONE 1

HEAT PUMP

ELECTRIC

NO PURGE

ON

D

B

ON

45

140

D

B

ON

D

B

OFF

C

A

C

A

OFF

ANY ZONE

HEAT/COOL

GAS

PURGE

OFF

C

A

#ZONES TO STAGE

CL:40

HT:170

PLENUM SENSOR

STAGE MINUTES

AUX. MINUTES

PLENUM

SENSOR

SPARE FUSE

ZONE/VAC

SELECTOR

OFF/ON

E-HEAT

SELECTOR

OFF/ON

POWER

HUM

EAC

HEATING

COOLING

FAN ON

VAC

E-HEAT

ZONE 1

ZONE 2

ZONE 3

ZONE 4

CONTROL PANEL

TERMINAL DESIGNATIONS

R

C

24V (hot) Thermostat voltage

24V (com) T-stat (if required) & damper voltage

Fan (thermostats and equipment) G

Y/Y1 1 st Stage Cooling or Compressor

(thermostats and equipment)

O

B

2S

W/W1 1 st Stage Heat or Auxiliary Heat

(thermostats and equipment)

Y2

W2

2 nd Stage Cooling or Compressor

(equipment)

2 nd Stage Heat or Emergency Heat

(equipment)

Reversing Valve—Cool

Reversing Valve—Heat

2 nd Stage Heat and/or 2

(thermostats) nd Stage Cool

NC

NO

Normally closed damper output

Normally open damper output

24VAC Voltage source for control panel, thermostats and dampers

RH

RC

Heating transformer—24V (hot)

Cooling transformer—24V (hot)

HUM Auxiliary relay active w/ heat calls

EAC Auxiliary relay active w/ blower operation

A&B Expansion panel connections

RATED VOLTAGE

RATED CURRENT

FUSE RATING

MAXIMUM AMBIENT TEMPERATURE

RH AND RC TERMINALS

PLENUM SENSOR

HIGH LIMIT TEMPERATURE

PLENUM SENSOR

LOW LIMIT TEMPERATURE

PRODUCT SPECIFICATIONS

20 to 30 VAC

3 amp

3 amp, slow blow fuse

140˚F

Independent heat and cool relays for 2 transformer systems

Selectable between 140˚F and 170˚F

Selectable between 40˚F and 45˚F

ADDITIONAL INSTALLATION FEATURES

• 45 degree angled terminals

• Enclosure accommodates wiring from the side or rear

• Wiring diagram on front cover

• Available common terminal for 24 volt powered stats

• Compatible with power-stealing thermostats

TRANSFORMER

REQUIREMENTS

REQUIRED VA

40

75

40 per 3 Dampers

MAX. # OF

POWERED

DAMPERS

3 or Less

4 thru 6

7 or more

• Fuse protection with extra fuse

• Convenient control of E-Heat through thermostat or on board switch

• Selectable - any zone sets mode or zone 1 sets mode

• Elec/non-elec selectable - proper control of the fan (G-terminal) for either electric or fossil fuel furnaces

PO Box 1467 • Madison, WI 53701-1467 • Phone 800/334-6011 • Fax 608/257-4357 • www.aprilairecontractor.com

©2004 Research Products Corporation Form No. 5034 50.06.04 Printed in U.S.A.