Sears N8MPL050B12B1 - Manual (Page 42)

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CONNECTION DIAGRAM
WARNING: ELECTRICAL SHOCK HAZARD
DISCONNECT BEFORE SERVICING
ROLLOUT SWITCH 1 TO 2
IN SERIES DEPENDING
ON MODEL MAIN LIMIT CAPACITOR
LPPRESSURE
(WHENI¿SED) ÍWHEJJUSED) (SOME MODELS)
COPPER CONDUCTORS
ONLY
HOT GND
* NEUTRAL I
NOTE: [
1. If any of tie original equipment wire Is replaced use wire rated 105'^C.
2. Use only copper wire between tie disconnect switch and the furnace
junction box.
3. This wire must be connected to furnace sheet metal for control to
prove fiame.
4. Symbols are electrical representation only.
5. Solid lines inside circuit board are printed circuit board traces and are
not depicted as shown in tie legend.
6. Replace only witi a 5 amp fuse.
7. Blower motor speed selections are for average conditions, see
installation instructions for details on optimum speed selection.
8. Factory connected when LP Pressure Switch and 8VSS (Chimney
Adapter Accessory Kit) are not installed.
9. Blower off-delay, gas heating selections are {60,100,140, and 180)
seconds, cooling or heat pump 90 seconds.
10. Ignition lockout will occur after four consecutive unsuccessful trials for
ignition. Control will auto-reset after tinree hours.
11. Blower motor and inducer motor contain internal auto-reset tiiermal
overload switches.
12. Flame sensor: 0.7 pA D.C. minimum, 2.0 - 4.0 pA nominal.
13. Depending on model, P4 inducer motor leads may be in a single connector
or two quick connecters._______________________________________
SPEED TAP CODE
BLACK HI
ORANGE MHI
BLUE MLO
RED LO
COLOR CODE
BLACK
BLUE
BROWN
GREEN/YELLOW
ORANGE
RED
WHITE
YELLOW BK
BL
8R
GRN/Y
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R
W
Y
LOW VOLTAGE FACTORY
LOW VOLTAGE FIELD
LINE VOLTAGE FACTORY
LINE VOLTAGE FIELD
CONDUCTOR ON CONTROL
J UNCTION
UNMARKED TERMINAL
CONTROL TERMINAL
LADDER DIAGRAM
TO 115VAC FIELD DISCONNECT
EQUIPMENT GROUND
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500
2. TJ X
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^ 100 180
j; 60 140
60 SEC.
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m 5 L ■
60 140
180 SEC,
330709-101 REV, By