SERVICE AND TECHNICAL SUPPORT MANUAL
Gas Furnace: N9MSE
Specifications subject to change without notice.
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7
Figure 4
Example of Single Stage Furnace Control for PSC Blower Motor
L11F090
ÏÏÏ
ÏÏÏ
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HEAT
OFF
ï
DELAY
TWINNING AND/OR
COMPONENT TEST
TERMINAL
P1
ï
LOW VOLTAGE MAIN
HARNESS CONNECTOR
TRANSFORMER 24
ï
VAC
CONNECTIONS
P2
ï
HOT SURFACE IGNITOR (HSI) & INDUCER
MOTOR (IND) CONNECTOR
115 VAC
(L1) LINE
VOLTAGE
CONNECTION
SPARE1
COM/BLUE
115
ï
VAC (L2) NEUTRAL
CONNECTIONS
24
ï
V THERMOSTAT
TERMINALS
HUMIDIFIER TERMINAL
(24
ï
VAC 0.5 AMP MAX)
3
ï
AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
24VAC/RED
BLOWER SPEED
SELECTION TERMINALS
HUM
XFMR
HUMIDIFIER
TERMINAL
115
ï
VAC
120
1
80
90 150
SPARE2
J2 JUMPER
J2
HUM
24VAC
BL
W
SPARE1 SPARE2
L2
NEUTRAL
EAC 1 AMP
IND HSI
P2
L1
SPARE3
SPARE3
