Wiring Schematic - Single Stage 80% And 90 - American Standard 50A65-475 Manual

Wiring Schematic
Single Stage 80% and 90%
120 VOLT, 60 HZ., 1 PH.
POWER SUPPLY
PER LOCAL CODES
1
2
N H
3
4
5
6
SWITCH
7
8
9
0
q
120V
w
TNS
e
r
24V
t
y
u
GND
i
o
p
a
s
d
f
YL/2
g
h
FLAME ROLL-OUT
SWITCH
j
YL/3
k
2 3
l
1 USED ON 90% FURNACE MODELS ONLY.
2 DIRECT VENT MODELS HAVE ONE MANUAL
;
RESET FLAME ROLL-OUT BI-METAL SWITCH
INSTEAD OF TWO.
z
3 SOME MODELS MAY HAVE A FUSE LINK HERE
OR A NON-RESETABLE BI-METAL SWITCH.
GND
CF
GND
I.D.
DOOR
BLOWER
MTR.
GND
1
TCO-B
BK BK
IND.
WH
MTR.
SINI IGNITOR
WH
C
2
GAS VALVE M
1, 3
PRESSURE
SWITCH
TCO
YL/1
TCO-B
2
SENSOR
BK
"A"
"B"
"C"
BK/1
BK/4
BK/3
OPTIONAL
BK/2
WH
WH/1
WH/4
BK
BK/6 1
WH BK/5 2
WH/6 3
WH/5 4
6
BL
3
RD
BL/1 9
12
RD/1
4
5
10
OR
7
YL
11
YL/5
1
WH 2
FLAME
8
GND
11
COOL
HEAT
PARK
PARK
HOT 120VAC
LINE
XFMR
EAC
HUM
CIR N
LINE N
NEUTRAL 120VAC
XFMR N
EAC N
HUM N
HOT 120VAC
IND
70 – 80 VAC
IGN
IND N
NEUTRAL
IGN N
TR
TH
DIP
SWITCH
MV
MV
1 2 3
PS
HLI
DIAGNOSTIC
LED
HLO
FP
GND
TWIN Y W G R C
TO THERMOSTAT
ON
OFF