Bryant 350MAV Installation, Start-Up, And Operating Instructions Manual page 21

SW2
PCB
BLOWER
SEE NOTE #10
OFF
DELAY
(NOT ON ALL MODELS) SW1
HUM
BLOWER OFF DELAY
SELECTION CHART
TEST/TWIN
90 SEC
135 SEC
180 SEC PL1
3 2 1
6 5 4
225 SEC
WHT
9 8 7
GVR
SEC-1 SEC-2
HI/LO
RELAY
24 VAC-3A
FU1
FUSE
COOL
SPARE-1
BLOWER
HSIR IDR BLWR
SPEED
SELECT
HEAT SPARE-2
EAC-1
L2
PL3
PL2
1
VAC
120
EAC-2
1
2
L1 PR1
2 3 C
PR2 OM
CAP -2
1 2 3 PL4
PL5
BRN
1 2
WHT
M
GRN/YEL AUX
OL
HSI
BLK
LEGEND
BLWR BLOWER MOTOR RELAY , SPST-(N.O.)
BLWM BLOWER MOTOR
CAP CAPACITOR
CPU MICROPROCESSOR AND CIRCUITRY
EAC-1 ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)
EAC-2 ELECTRONIC AIR CLEANER CONNECTION (COMMON)
FRS FLAME ROLLOUT SW. -MANUAL RESET, SPST -(N.C.)
FSE FLAME PROVING ELECTRODE
FU1 FUSE, 3 AMP , AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED
FU2 FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE
(FIELD INSTALLED & SUPPLIED)
GND EQUIPMENT GROUND
GV GAS VALVE-REDUNDANT OPERATORS
GVR GAS VALVE RELAY , DPST -(N.O.)
HI/LO BLOWER MOTOR SPEED CHANGE RELAY , SPDT
HSI HOT SURFACE IGNITOR (115 VAC)
HSIR HOT SURFACE IGNITOR RELAY , SPST -(N.O.)
HUM 24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)
IDM INDUCED DRAFT MOTOR
IDR INDUCED DRAFT RELAY , SPST -(N.O.)
ILK BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST -(N.O.)
JB JUNCTION BOX
LED LIGHT-EMITTING DIODE FOR STATUS CODES
LGPS LOW GAS PRESSURE SWITCH, SPST-(N.O.)
LS LIMIT SWITCH, AUTO RESET, SPST(N.C.)
OL AUTO-RESET INTERNAL MOTOR OVERLOAD TEMP. SW.
PCB PRINTED CIRCUIT BOARD
(WHEN USED)
G
LGPS
PRS
R
Y
ORN
W
C
OM
NOTE #6
LED
RED
RED
LS FRS
WHT
FSE
RED
BLU BLK
WHT
RED
GRN/YEL
BLK (HI)
BRN
OL
YEL (MED HI)
START
NOTE #8
BLU (MED LO)
BRN
BLWM
RED (LO)
WHT (COM)
WHT
BLK
JB
BRN
IDM
WHT
ILK
BLK
GND
PL1 9-CIRCUIT CONNECTOR
PL2 2-CIRCUIT PCB CONNECTOR
PL3 3-CIRCUIT IDM CONNECTOR
PL4 3-CIRCUIT IDM EXTENSION CONNECTOR
PL5 2-CIRCUIT HSI/PCB CONNECTOR
PRS PRESSURE SWITCH, SPST-(N.O.)
SW1 & 2 BLOWER OFF DELAY
TEST/TWIN COMPONENT TEST & TWIN TERMINAL
TRAN TRANSFORMER-115VAC/24VAC
JUNCTION
UNMARKED TERMINAL
PCB TERMINAL
FACTORY WIRING (115VAC)
FACTORY WIRING (24VAC)
FIELD WIRING (115VAC)
FIELD WIRING (24VAC)
CONDUCTOR ON PCB
FIELD WIRING TERMINAL
FIELD EARTH GROUND
EQUIPMENT GROUND
FIELD SPLICE
PLUG RECEPTACLE
Fig. 24—Wiring Diagram
TO 115VAC FIELD DISCONNECT
L1
NOTE #4
ILK
YEL
L1
BLU
NOTE #13
BLWR
GV
GRN/YEL
HSIR
NOTE #5
GRN/YEL
IDR
WHT (COM)
CAP -1
TEST/TWIN
FU1
NOTE #12
HUM
R
W
HSIR
FUSED DISCONNECT
SWITCH (WHEN REQ'D)
NOTE #4
NEUTRAL
L1
FU2
Y
G
C
OM
NOTES:
1. IF ANY OF THE ORIGINAL EQUIPMENT WIRE IS REPLACED USE WIRE RATED FOR 105 °C.
2. INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL
AUTO-RESET THERMAL OVERLOAD SWITCHES (OL).
3. BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS, SEE INSTALLATION
INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEED SELECTION.
4. USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH AND THE
FURNACE JUNCTION BOX (JB).
5. THIS WIRE MUST BE CONNECTED TO FURNACE SHEETMETAL FOR CONTROL TO PROVE
FLAME.
6. FACTORY CONNECTED WHEN LGPS NOT USED.
7. REPLACE ONLY WITH A 3 AMP FUSE.
8. YELLOW LEAD NOT ON ALL MOTORS.
9. BLOWER-ON DELAY, GAS HEATING 60 SECONDS, COOLING OR HEAT PUMP 2 SECONDS.
10. BLOWER-OFF DELAY, GAS HEATING 90, 135, 180 OR 225 SECONDS, COOLING OR
HEAT PUMP 90 SECONDS. (135 SECONDS ONLY ON SOME MODELS)
11. IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUCCESSFUL
TRIALS-FOR-IGNITION. CONTROL WILL AUTO-RESET AFTER THREE HOURS.
12. SOME MODELS MAY HAVE SPADE QUICK CONNECT TERMINALS.
13. GAS VALVE LEADS ARE INTERCHANGEABLE ON SINGLE STAGE VALVES.
SCHEMATIC DIAGRAM
(NATURAL GAS & PROPANE)
L2
EQUIPMENT GROUND
LO
SPARE-2
MED LO
HEAT
MED HI
HI
START
SPARE-1
OL
HI/LO
NOTE #8
COOL
COM
COM
BLWM
EAC-1
EAC-2
1
1 HSI
2
PL2 2 PL5
M
1 1
PR2
PR1 115VAC
3 3
TRAN
PL3
PL4
CAP -2
24VAC
2
2
NOTE #7
FRS
SEC-2
SEC-1
GVR-2
7
1
LGPS (WHEN USED)
4
BLWR HI/LO NOTE #6
PL1
IDR GVR
PRS
3
NOTE #13
GVR-1
2
CPU
8
5
6
9
A00349
L2
CAP-1
IDM
OL
AUX
LS
GV
NOTE #5
FSE