Bryant 333BAV Service And Maintenance Procedures Manual page 7

CONNECTION DIAGRAM
Connect VIO wire to pin
A, B, C, or D as
designated on furnace
rating plate as "PIN".
VIO
A B
C D
14 1
PL7
BLK
3
3
GRN
BLU
RED
AC
HI
400
MID HI
HP
3 M-HI
EFFY MED
M-LO M-HI
350
HP
LO
HI
315 CMFT LO
-
COOL COOL AC GAS
CONTINUOUS FAN
CFM
HP HEAT
CFM
PER TEMP
TON RISE
YEL BLU ORN RED GRN
AFS
NOTE 4
LEGEND
AFS AIRFLOW SELECTOR
ALS1 AUXILIARY LIMIT SWITCH, OVERTEMP . MANUAL RESET, SPST (N.C.)
ALS2 AUXILIARY LIMIT SWITCH, OVERTEMP . AUTO RESET, SPST (N.C.)
BHI / LOR BLOWER MOTOR SPEED CHANGE RELAY , SPDT
BHT / CLR BLOWER MOTOR SPEED CHANGE RELAY , SPDT
+ - = - =
BLWM BLOWER MOTOR, ICM2 CTL CONTROL PWR POWER
BLWR BLOWER MOTOR RELAY , SPST (N.O.)
CPU MICROPROCESSOR AND CIRCUITRY
DSS DRAFT SAFEGUARD SWITCH (N.C.)
EAC-1 ELECTRONIC AIR CLEANER CONNECTION (115 VAC, 1 AMP MAX.)
EAC-2 ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS1 FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FRS2 FLAME ROLLOUT SWITCH OVERTEMP. MANUAL RESET, SPST (N.C.)
FSE FLAME-PROVING SENSOR ELECTRODE
FU1 FUSE, 3 AMP , AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU2 FUSE, FIELD INSTALLED
GV GAS VALVE, REDUNDANT LOW-HEAT OPERATORS, 2-STAGE
HPS HIGH-HEAT PRESSURE SWITCH, SPST (N.O.)
HPSR HIGH-HEAT PRESSURE SWITCH RELAY , SPST (N.C.)
HSI HOT-SURFACE IGNITER (115 VAC)
HSIR HOT-SURFACE IGNITOR RELAY , SPST (N.O.)
HUM 24VAC HUMIDIFIER CONNECTION (0.5 AMP . MAX.)
IDM INDUCED DRAFT MOTOR, 2-SPEED, SHADED-POLE
IDR INDUCER MOTOR RELAY , SPST (N.O.)
IHI / LOR INDUCER MOTOR SPEED CHANGE RELAY , SPDT
ILK BLOWER DOOR INTERLOCK SWITCH, SPST (N.O.)
IND INDUCTOR (NOTE 16)
JB JUNCTION BOX
LED LIGHT-EMITTING DIODE FOR STATUS CODES
LGPS LOW GAS-PRESSURE SWITCH, SPST (N.O.)
LPS LOW-HEAT PRESSURE SWITCH, SPST (N.O.)
LS LIMIT SWITCH, OVERTEMPERATURE-AUTO RESET, SPST (N.C.)
MGVR MAIN GAS VALVE RELAY DPST (N.O.)
- -
1 = VALVE 2 = HUMIDIFIER
N / A NOT APPLICABLE
PL1 12-CIRCUIT CONNECTOR
PL2 9-CIRCUIT CONNECTOR
LS FRS2 NOTE 9
LPS
RED
LGPS
FRS1
DSS
(WHEN USED)
ALS2
HEAT
SET-UP
SWITCH
SWITCH
1 2
NORM (WHEN USED)
*
HI HT
NOTE 7
LO HT
1
ALS1
BLOWER-
OFF DELAY
SWITCH
(SEC.)
3 4
90 SEC
135 SEC *
YEL
180 SEC
225 SEC
PL4
PL2
4
RED
BRN
BRN
BLK
PR1 PR2
BLU
L2
* L1
FACTORY
YEL
SETTINGS
ORN
COMMON
NOTE 17
BLOWER-OFF DELAY RED
HI-COOL
BLOWER-OFF DELAY
LOW-HEAT ONLY HI-GAS
RED
HEAT
HIGH-HEAT ONLY
EAC-2
PL1
WHT LO-GAS
HEAT EAC-1
WHT
TWIN
GRN
TEST SPARE SPARE
TJ
M
SEC1
FU1
LED
W2 Com W/W1 Y/Y2 R G HUM
S SEC2
24V
BLU
2-STAGE
4 FURNACE
CONTROL
3
NOTES:
1. Use only copper wire between the disconnect switch and the furnace.
PL3 3-CIRCUIT IDM CONNECTOR
2. If any of the original wire, must be replaced, use the same or equivalent type.
PL4 6-CIRCUIT CONNECTOR
3. Inducer (IDM) motor contains internal auto-reset thermal overload switch.
PL5 1-CIRCUIT CONNECTOR (NOTE 16)
4. Blower motor airflow selections are for nominal conditions. See Installation
PL6 2-CIRCUIT HSI CONNECTOR
Instructions for details on optimum airflow selections.
PL7 14-CIRCUIT CONNECTOR
5. Blower motor (BLWM) is locked-rotor overload protected by redundant
PL8 5-CIRCUIT CONNECTOR
electronic control circuits. Restart is attempted every 15 seconds for 2 minutes,
PL9 16-CIRCUIT CONNECTOR
after which it locks OFF. Reset by turning OFF all control and/or power inputs.
*
SW1 HIGH-HEAT-ONLY SWITCH, SPST (MANUAL)
6. Replace only with a 3-AMP fuse.
*
SW2 LOW-HAT-ONLY SWITCH, SPST (MANUAL)
7. Auxiliary limit switches (ALS1 & 2) used on some horizontal and some
SW3 & 4 BLOWER-OFF DELAY SETTING SWITCHES,
downflow models.
*
SPST (MANUAL)
8. This wire must be connected to furnace sheet metal for control to prove flame.
TJ TWINNING JUMPER,
9. Factory connected when LGPS not used.
SPDT(MANUAL CHANGE-OVER). (NOTE 17)
10. Symbols are an electrical representation only.
TRAN TRANSFORMER-115VAC/24VAC
11. BLOWER-ON DELAY: Gas heating 45 seconds, Cooling/Heat Pump 2 sec.
TWIN/TEST 1-CIRCUIT TWINNING BUSS CONNECTOR,
12. Cooling/Heat Pump BLOWER-OFF DELAY is 90 seconds.
ALSO STATUS CODE RECALL. (NOTE 17)
13. IGNITION-LOCKOUT will occur after four consecutive unsuccessful
trials-for-ignition. Control will automatically reset after three hours.
JUNCTION
14. Control must be grounded at pin 10 of 12-pin connector.
TERMINAL
15. Inductor is used on 060 or
CONTROL TERMINAL
PL5 connectors are joined without IND on other furnace sizes.
FACTORY POWER WIRING (115VAC)
16. Twinning is not permitted with ICM2
FACTORY CONTROL WIRING (24VAC) MASTER position.
17. Terminals (HI-COOL, HI-GAS-HEAT, and LO-GAS-HEAT) are not used for
FIELD POWER WIRING (115VAC)
+
ICM2 BLWM. Do not remove electrical insulators.
FIELD CONTROL WIRING (24VAC)
CONDUCTOR ON CONTROL
To initiate the component test sequence with no thermostat inputs and
FIELD WIRING SCREW TERMINAL
with all inducer Post-Purge and Blower-Off Delay periods completed,
FIELD GROUND
short the "TWIN/TEST" terminal to the "
EQUIPMENT GROUND
seconds. The control will turn ON the inducer motor Low-Speed, inducer
FIELD SPLICE
motor High-Speed, HSI, blower motor Continuous-Fan Speed, blower
PLUG RECEPTACLE
motor High-Gas-Heat Speed, and blower motor High-Cool Speed for
AIRFLOW SELECTOR JUMPER PINS
7-15 seconds each. Neither the gas valve nor the humidifier will be
AIRFLOW SELECTOR FACTORY SETTING
turned ON.
Fig. 9–Furnace Wiring Diagram
GRY HPS HI
BRN EQUIPMENT
P GROUND
BRN
GV
C
BLU M
GRN/YEL
GRN/YEL
IDM
HSI
FUSED DISCONNECT
GRN/YEL
SWITCH (WHEN REQ'D)
ILK
JB NOTE #1
L1 BLK
FU2
PL6 WHT L2 WHT
2
GND
1 2 3 PL3
RED
BLK
WHT
BLK
WHT
NOTE 15
PL5 PL5
BLK BLWM
5
IND
4
3
WHT
2
TRAN
YEL
1
PL8
16
9
PL9
8
1
RED
4
3
BLWM-CTL
3
BK/PWM 10
+ 16
OUT
-
8
OUT
EM/W2 13
R 12
C1 1
C2 3
W/W1 2
ADJ 7
G 15
HEAT 11
Y/Y2 14
-
20 cooling airflow size furnaces only.
O 9
+
blower motors. Keep twinning jumper in
COOL 5
DELAY 4
COMPONENT TEST
C
OM" terminal for about two
Y1 6
Y1
O
NOTE 1
TO 115VAC FIELD DISCONNECT SWITCH
ILK
SEE BLWM-CTL
BHI / LOR
LO-GAS-HEAT
PL5 PL5
BHT / CLR
HI-GAS-HEAT
L1
IND
BLWR
SPARE
HI-COOL
NOTE 15
COMMON
HSIR EAC-1 EAC-2
IHI / LOR
IDR
PR1
115VAC PR2
FU1
TRAN
SEC1
SEC2
HPSR
24VAC
NOTE 6
HUM MGVR-2
R
TWIN
TEST PL4
5
24
SLAVE
TWINNING
VAC
JUMPER 4
BHI / LOR
TJ
W2
W/W1 MASTER
1
BHT / CLR
NOTE Y
Y2
16
2
BLWR
G
6
SW1
MGVR-1
W2
Y/Y2 CPU
G
PL9
3
C1
C
OM
2
13
10 12
14
9
8
6
5
11
1
A B
AC
HI
HI
M-HI 400 MID
HP
350 M-HI
M-LO MED
EFFY
HP
LO
CMFT LO
315 HI
-
3 COOL COOL GAS
AC CONTINUOUS
CFM HEAT
SIZE HP
CFM
TEMP
PER
TON RISE
4
NOTE 4
7
A00357
L2
5
4
3 BLWM-PWR
2
1
PL8
3 1
PL2
HSI
PL6 2
9
LO
2
4 PL3
HI
1
7 3
COM
8
1
N/A
5
6
N/A
2
FRS2
N/A (WHEN
12
USED)
2
FRS1
LS
3
9 ALS1
ALS2
6
(WHEN USED)
PL1
DSS
NOTE 9
LPS
(WHEN USED)
5
LGPS
NOTE 9
4
HPS
P
1
HI
M
10
GV
C
NOTE 8
FSE
7
8 N/A
11 N/A
PL7
C D
FAN
AFS