Bryant 352MAV Service And Maintenance Procedures Manual page 11

CONNECTION DIAGRAM
LS FRS
LPS
RED
LGPS
NOTE #7
HEAT
SET-UP
SWITCH
SWITCH
1 2
NORM
*
HI HT
LO HT
BLOWER-
OFF DELAY
SWITCH
(SEC.)
3 4
90 SEC
*
135 SEC
180 SEC
2-STAGE
225 SEC
FURNACE
CONTROL
* ORN
RED
BLOWER-OFF DELAY
BLOWER-OFF DELAY
RED
LOW-HEAT ONLY
HIGH-HEAT ONLY
TWIN
TEST
TJ
M
S
W2 Com W/W1 Y/Y2 R G HUM WHT
LED
24V
LEGEND
BHI / LOR BLOWER MOTOR SPEED CHANGE RELAY , SPDT
BHT / CLR BLOWER MOTOR SPEED CHANGE RELAY , SPDT
BLWM BLOWER MOTOR, 4 or 5 -SPEED, PERMANENT-SPLIT-CAPACITOR
BLWR BLOWER MOTOR RELAY , SPST (N.O.)
CAP CAPACITOR -1 = BLWM -2 = IDM
CPU MICROPROCESSOR AND CIRCUITRY
EAC-1 ELECTRONIC AIR CLEANER CONNECTION (115 VAC, 1 AMP MAX.)
EAC-2 ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS 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 OPERATO RS, 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.)
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.)
To initiate the component test sequence with no thermostat inputs and with all inducer Post-Purge and Blower-Off Delay periods completed, short the "TWIN/TEST" terminal to the "
will turn ON the inducer motor High-Speed, HSI, inducer motor Low-Speed, blower motor Low-Gas-Heat Speed, blower motor High-Gas-Heat Speed, and blower motor High-Cool Speed for 7-15 seconds each
(the inducer motor will be ON the entire length of the test). Neither the gas valve nor the humidifier will be turned ON.
HPS
BRN
GRY
BRN
BLU
GRN / YEL
CAP-2
BRN
BRN
IDM
HSI
ILK
OL
JB
L1
PL6
L2
1 2
GND
1 2 3 4 PL3
GRN
YEL
WHT
PL2
PR1 PR2
CAP-1
L1 L2
COMMON
BRN
NOTE #4
HI-COOL
COM WHT
HI BLK
HI-GAS EAC-2
HEAT
MED HI YEL
PL1
LO-GAS
MED
NOTE #14 ORN
EAC-1
HEAT
MED LO BLU
SPARE
SPARE LO RED
SEC1
FU1
SEC2
MGVR MAIN GAS VALV E RELAY , DPST (N.O.)
-
1 = VALVE
PL1 12-CIRCUIT CONNECTOR
PL2 9-CIRCUIT CONNECTOR
PL3 4-CIRCUIT IDM CONNECTOR
PL6 2-CIRCUIT HSI CONNECTOR
SW1 HIGH-HEAT-ONLY SWITCH, SPST (MANUAL)
SW2 LOW-HEAT-ONLY SWITCH, SPST (MANUAL)
SW3 & 4 BLOWER-OFF DELAY SETTING SWITCHES,
*
SPST (MANUAL)
TJ TWINNING JUMPER, SPDT FOR MASTER OR
SLAVE STATUS (MANUAL CHANGE OVER)
TRAN TRANSFORMER-115VAC/24VAC
TWIN/TEST 1-CIRCUIT TWINNING BUSS CONNECTOR,
ALSO COMPONENT TEST
JUNCTION
TERMINAL
CONTROL TERMINAL
FACTORY POWER WIRING (115VAC)
FACTORY CONTROL WIRING (24VAC)
FIELD POWER WIRING (115VAC)
FIELD CONTROL WIRING (24VAC)
CONDUCTOR ON CONTROL
FIELD WIRING SCREW TERMINAL
FIELD GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
TO 115VAC FIELD DISCONNECT SWITCH
HI
EQUIPMENT GROUND
ILK
GV
C
M NOTE #6
BHT / CLR
GRN/YEL
L1
BLWR
FUSED DISCONNECT
SWITCH (WHEN REQ'D)
NOTE #1
HSIR EAC-1
BLK
FU2
WHT
IHI / LOR
GRN
IDR
PR1
115VAC
FU1
SEC1
NOTE #5
BLK
WHT
BRN
HUM
TRAN
R
BLWM TWIN
RED
BLU TEST
SLAVE
W/W1
-
2 = HUMIDIFIER MASTER
W2
*
*
Y/Y2
G
C
OM
NOTES:
1. Use only copper wire between the disconnect switch and the
unit.
2. If any of the original wire, as supplied, must be replaced, use
the same or equivalent type wire.
3. Inducer (IDM) and blower (BLWM) motors contain internal
auto-reset thermal overload switches.
4. Blower motor speed selections are for average conditions. See
Installation Instructions for details on optimum speed selection.
5. Replace only with a 3-AMP fuse.
6. This wire must be connected to furnace sheet metal for
control to prove flame.
7. Factory connected when LGPS not used.
COMPONENT TEST
Fig. 15—Wiring Diagram
SCHEMATIC DIAGRAM (NATURAL GAS & PROPANE)
NOTE #1
BHI / LOR
LO-GAS-HEAT
LO
MED LO
HI-GAS-HEAT
NOTE #14
MED
SPARE HI
COM
SPARE
HI-COOL MED HI
NOTE #4
COMMON
CAP-1
EAC-2
3 1
PL2
HSI
PL6
9 2
LO
4
4
1
7
2
8 3
COM
PL3
PR2
TRAN
SEC2
1
N/A
24VAC HPSR 5
6
N/A
2
N/A
12
2
MGVR-2
FRS
3
9
6
TWINNING
JUMPER
PL1
NOTE #7
TJ
(WHEN USED)
5 LGPS
4
CPU
MGVR-1
1 M
10
GV
C
NOTE#6
FSE
7
8
11
8. Symbols are an electrical representation only.
9. BLOWER-ON DELAY: Gas heating 60 seconds,
Cooling/Heat Pump 2 seconds.
10. BLOWER-OFF DELAY: Gas heating 90, 135, 180, or
225 seconds, cooling or heat pump 90 seconds.
11. IGNITION-LOCKOUT will occur after four
consecutive unsuccessful trials-for-ignition.
Control will automatically reset after three hours.
12. Control must be grounded at pin 10 of 12-pin connector.
13. NA - Not Applicable (Not used)
14. Orange lead not available on all models.
C
OM" terminal for about two seconds. The control
L2
BLWM
BRN
BRN
HI
OL
LS
LPS
HPS
HI
326050-101 REV. B
A01018