Wiring Diagram - Bryant 912SE Installation, Start-Up, Operating And Service And Maintenance Instructions

912SE: Installation, Start-up, Operating and Service and Maintenance Instructions

WIRING DIAGRAM

G
C
W
Y
R
TRAN
NOTES:
1. If any of the original equipment wire is replaced use wire rated f or 105ºC.
2. Use only copp er wire be tween the disconnect switch and the f urnace junction box (JB).
3. This wire must be connected to f urnace sheet metal f or con trol to prove flam e.
4. Symbols are elec trical representation onl y.
5. Solid lines inside PCB are printed c ircuit bo ard conduct ors and are not included in
legen d.
6. Replace only with a 3 amp fus e.
7. Inductor may be used with 3/4 hp and 1 hp ECM Blower motors. Review motor instructions
if replacing motor to see if Induct or is required.
8. Factory connected when L GPS is not use d.
9. Blower-off delay: gas heating selections
or heat pump 90, 30 seconds o r 5 seconds .
10. Ignitio n-lockout will occ ur aft er four consecutive unsuccessful trials-for-ignitio n.
Control will aut o-reset aft er three ho urs.
11. Induc er (IDM) mot or contains int ernal aut o-reset th ermal ov erload switches (OL).
12. PL 13 and PL14 not available on all motors. Blower motor (BLWM) leads may be
hardwired at motor. Depending on motor type, 24V Common wire may be in either
CTRL (PL5) or Power (PL6) Connector
13. N connections are int erchangeable within the N connect or bloc k.
14. BLWM is locked - rotor overload protected by redundant elec tronic con trol c ircuit s.
Prime Condensate Trap with Water
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow these warnings could result in personal injury or
death.
Failure to use a properly configured trap or NOT water-priming trap
before operating furnace may allow positive pressure vent gases to
enter the structure through drain tube. Vent gases contain carbon
monoxide which is tasteless and odorless.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in intermittent unit operation
or performance satisfaction.
Condensate trap must be PRIMED or proper draining may not occur.
The condensate trap has two internal chambers which can ONLY be
primed by pouring water into the inducer drain side of condensate trap.
1. Remove upper and middle collector box drain plugs opposite of the
condensate trap. See Fig. 62.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
CONNECTION DIAGRAM
PRINTED CIRCUIT BOARD
24VAC HUM
STATUS
CODE LED
SEE R ATING PLA T EFO R
M ODEL P RO GR AM #
SEE INST ALLA TION INSTRUCTIONS
FOR AIR FLOW SETTINGS
NEUTRAL-L2 EAC-1
EAC-2
BL PR L1
PL1
YEL
RED
BRN
PL16
BLK 2 1
PL2
PL12
IDM
PL12
GRN/YEL
YEL
ORG
BLWM
C NOTE #12
BRN
FUSED OR CIRCUIT
BREAKER DISCONNECT
SWITCH (WHEN REQ'D)
JB
FU2
ILK
NOTE #2
are 90, 120, 150 or 180 seconds, cooli ng
Fig. 61 – Wiring Diagram
SCHEMATIC DIAGRAM
TO 115VAC FIELD - DISCONNECT SWITCH
NOTE #2
EQUIPMENT
N
ILK GROUND
N
L1
PL2
IDR
2
HSIR
1
NOTE #5 PCB PL16
PL1-9 1
PL1-7
CPU
3
PL1-11
2
PL12 PL12
IND
NOTE #7
BL
EACR
EAC-1
EAC-2
LS2
LS1 FRS1
PL1-6
(WHEN USED)
FRS2
HUM
24VAC
R
W
CPU
Y
G
GVR
C
PCB
NOTE #5
PL1-1
L JUNCTION TERMINAL
E
CONTROL TERMINAL
G
PCB CONTROL TERMINAL
E
FIELD EARTH GROUND
N
EQUIPMENT GROUND
D
BLWM Blower Motor (ECM)
LGPS
CPU Microprocessor / Circui t ry
LPS
DISP1
7-Segment display
LS
EAC-1
Electroni c Air Cleaner Connecti o n
PCB
(115VAC 1.0 Amp Max.)
PL1
EAC-2 Electroni c Air Cleaner Connection (Common)
PL2
FRS
Flame-Rollout Switch, Man. Reset, SPST (N.C.)
PL3
FSE
Flame Proving Sensor Electrode
PL5
FU1 Fuse, 3 Amp, Automotive Blade Type
PL12
Factory Install e d
PL13
FU2
Fuse or Disconnect
PL14
GV Gas Valve -redundant
PL16
GVR Gas Valve Relay, SPST (N.O.)
TRAN
HPS
Inducer Housing Pressure Switch, SPST (N.O.)
HSI
Hot Surface Ignit e r (115VAC)
HSIR Hot Surface Ignit e r Relay, SPST (N.O.)
24VAC HUM
24VAC Humidifi e r Connection (0.5 Amp Max.)
HUMR
Humidifi e r Relay, SPST (N.O.)
IDM Induced Draft Mot o r, ECM
IDR Inducer Motor Relay, SPST (N.O.)
ILK
Blower Door Interlock Switch, SPST (N.O.)
IND
Induct o r (Note #7)
KY1
Next / Option Push Butto n
KY2
Menu / Select Push Butto n
LED
Light Emitting Diode f o r Status Codes
Fig. 62 – Priming Condensate Trap
2. Connect field-supplied 5/8-in. (16 mm) ID tube with attached
funnel to upper collector box drain connection.
3. Pour one quart (liter) of water into funnel/tube. Water should run
through collector box, overfill condensate trap, and flow into open
field drain.
4. Remove funnel; replace collector box drain plug.
5. Connect field-supplied 5/8-in. (16 mm) ID tube to middle collector
box drain port.
55
IDM
1
HSI
2
PL3
N
PL13
1
1
2
3
4
BLWM
5
NOTE #12
C
L
G
N
N
PL14
PR N
115VAC
TRAN
SEC1
SEC2
FU1
24VAC
NOTE #6
HPS
PL1-8
LPS
NOTE #8
PL1-2
(WHEN USED)
LGPS
PL1-4
PL1-3 GV
PL1-5
PL1-10
NOTE #3
FSE
FACTORY POWER WIRING (115VAC)
FACTORY CONTROL WIRING (24VAC)
FIELD CONTROL WIRING (24VAC)
CONDUCTOR ON CONTROL
FIELD WIRING SCREW TERMINAL
PLUG RECEPTACLE
Low Gas Pressure Switch, SPST (N.O.)
Collect o r Box Pressure Switch, SPST (N.O.)
Limit Switch, Auto-Reset, SPST (N.C.)
Printed Circuit Board
11-Circuit PCB Connect o r
2-Circuit HSI & IDM Connect o r
2-Circuit HSI Connect o r
4-Circuit Super Plug Connect o r
1-Circuit Induct o r Splice Connect o r
5 or 6 Circuit ECM Blower CTRL Connect o r
3 or 4 Circuit ECM Blower Power Connect o r
3-Circuit PWM Connect o r
Transformer, 115VAC / 24VAC
A210800
A11392