Bryant 330JAV, Service And Maintenance Procedures Manual

The control in this furnace is equipped with an LED status light to
aid in installation, servicing, and troubleshooting. It can be viewed
through the sight glass or window on blower access door. The
control indicates status with the LED on continuously, rapid
flashing, or a code composed of 2 digits. (The first digit is the
number of short flashes, the second is the number of longs flashes.)
Refer to service label on blower compartment door for code
explanations and useful troubleshooting suggestions. (See Fig. 12.)
It is important to note that power to furnace must not be interrupted
and furnace blower door must not be removed until the LED status
code(es) is recorded. When power to control is interrupted, status
memory is erased.

The control will store up to 5 previous codes but will not store
non-current codes longer than 48 hr. To retrieve previous codes, if
present, no thermostat inputs to control must be present and all
time delays must expire. Remove 1 of the red main limit wires 1
to 4 sec until the LED light goes out, then reconnect it. (See Fig.
5 and 6.) (Do not leave red wire disconnected for longer than 4 sec
as control will assume an overtemperature condition exists and
will respond with indoor blower operation.) This places control in
status recall mode and displays first code stored in memory.
Record code and repeat the disconnect and reconnect of red wire,

→

Fig. 9—Heating and Cooling Application Wiring Diagram for Single-Stage Thermostats

and Single-Speed Condensing Units

A97443

115-V FUSED

DISCONNECT

SWITCH

(WHEN REQUIRED)   

JUNCTION
BOX   

CONTROL

BOX

24-V

TERMINAL

BLOCK  

TWO-WIRE

HEATING-

ONLY   

FIVE

WIRE

1-STAGE THERMOSTAT TERMINALS

FIELD-SUPPLIED

FUSED DISCONNECT

CONDENSING

UNIT   

FURNACE

COM

R

W

Y

R

G

C

GND   

GND   

FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING   

208/230- OR
460-V
THREE
PHASE   

208/230-V
SINGLE
PHASE   

WHT   

BLK   

WHT   

BLK   

W/W1

W2

Y/Y2

G

NOTES: 

1.  Connect Y-terminal as shown for proper operation.

                2.  Some thermostats require a "C" terminal connection as shown.

3.  If any of the original wire, as supplied, must be replaced,
     use same type or equivalent wire.

→

Fig. 10—Heating and Cooling Application Wiring Diagram for 2-Stage Thermostats

and/or 2-Speed Condensing Units

A97444

115-V FUSED

DISCONNECT

SWITCH

(WHEN REQUIRED)   

JUNCTION
BOX   

CONTROL

BOX

24-V

TERMINAL

BLOCK  

THREE-WIRE

HEATING-

ONLY   

SEVEN

WIRE

2-STAGE THERMOSTAT TERMINALS
   

FIELD-SUPPLIED

FUSED DISCONNECT   

2-SPEED
CONDENSING
UNIT   

FURNACE

G

R

W2

Y2

G

Y1

C

GND   

GND   

FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING   

208/230- OR
460-V
THREE
PHASE   

208/230-V
SINGLE
PHASE   

Y2   

Y1   

C   

WHT   

BLK   

WHT   

BLK   

W1

R

W2

COM

W/W1

Y/Y2

NOTES: 

1.  Connect Y-terminal as shown for proper operation.

                2.  Some thermostats require a "C" terminal connection as shown.

3.  If any of the original wire, as supplied, must be replaced,
     use same type or equivalent wire.

—6—