Wiring Schematic - Single Stage 50A50 Integrated Furnace Control - American Standard *UD Series Operation Manual

Wiring Schematic
Single Stage (White-Rodger's 50A50 and 50A55 Series Integrated Furnace Controls)
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
e TNS
r
24V
t
y
MTR.
u
GND
i
o
p
a
s
d
FUSE LINK4
f
YL/2
g
h
j
YL/3
k
FUSE LINK
2 3 4
l
1 USED ON 90% FURNACE MODELS ONLY.
2 DIRECT VENT MODELS HAVE ONE MANUAL
;
RESET FLAME ROLL OUT SWITCH INSTEAD
OF TWO, SINGLE-USE FUSIBLE LINKS.
z
3 USED ON DOWNFLOW/HORIZONTAL AND
UPFLOW/HORIZONTAL MODELS. TCO-B IS
REVERSE FLOW SWITCH.
4 MAY BE A FUSE LINK OR BIMETAL SWITCH.
Note: See Integrated Furnace Control on Timing Chart for Control Details.
GND
CF
GND
I.D.
DOOR
BLOWER
MTR.
GND
1
TCO-B
BK BK
IND.
WH
IGNITOR
WH
C
2
GAS VALVE
M
1, 3
PRESSURE
SWITCH
TCO
YL/1
TCO-B
3
FLAME
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
BL 6
3
RD
BL/1 9
12
RD/1
4
5
10
OR
7
YL
11
YL/5
1
WH 2
8
GND
15
50A50-ALL
INTEGRATED FURNACE CONTROL
COOL
HEAT
PARK
PARK
HOT 120VAC
LINE
XFMR
EAC
HUM
CIR N
LINE N
NEUTRAL 120VAC
XFMR N
EAC N
HUM N
IND
HOT
IGN
120VAC
IND N
NEUTRAL
JUMPER
IGN N
50A50-571
TR
TH
DIP
SWITCH
MV
ON
MV
OFF
1 2 3
PS
HLI
DIAGNOSTIC
LED
HLO
FP
GND
Y W G R C
TO THERMOSTAT