International comfort products N9MSB Service And Technical Support Manual page 7

SERVICE AND TECHNICAL SUPPORT MANUAL
Figure 4 Example of Single Stage Furnace Control for PSC Blower Motor
115−VAC (L2) NEUTRAL
440 04 4412 03
J2 JUMPER
OFF−DELAY
24−V THERMOSTAT
TERMINALS
3−AMP FUSE
COM/BLUE 24VAC/RED
LED OPERATION &
DIAGNOSTIC LIGHT
Ï Ï Ï
Ï Ï Ï
CONNECTIONS
Ï Ï Ï
SPARE1
SPARE2
SPARE1
BLOWER SPEED
SPARE2
SELECTION TERMINALS
SPARE3
Specifications subject to change without notice.
HEAT
COMPONENT TEST
TERMINAL
HUMIDIFIER TERMINAL
(24−VAC 0.5 AMP MAX)
HUM
24VAC
TRANSFORMER 24−VAC
CONNECTIONS
P1 − LOW VOLTAGE MAIN
HARNESS CONNECTOR
EAC 1 AMP
1−AMP@115VAC
XFMR
SPARE3
HUM
115 VAC
(L1) LINE
VOLTAGE HUMIDIFIER
CONNECTION
TERMINAL
115−VAC
Gas Furnace: N9MSB
P2
IND HSI
P2−HOT SURFACE IGNITOR (HSI) & INDUCER
MOTOR (IND) CONNECTOR
L13F013
7