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S9240F1004 MODULATING HOT SURFACE IGNITION INTEGRATED FURNACE CONTROL
Terminal Type
12-position screw terminal block
(#5 screw)
4-position screw terminal block
(#5 screw)
Straight Spade Quick Connect
12-pin connector (male terminals)
6-pin connector (male terminals)
Terminal Type
2 pin connector (male terminals)
3-pin connector (male terminals)
Straight Spade Quick-connect
69-2088—01
Table 1. Wiring Connections - Class 2 - Low Voltage.
Connection/Label
W1
W2
G
Y2
Y1
C
R
DH
H - (optional)
L
O - (optional)
DS - (optional)
Outdoor Sensor
Discharge Air Sensor
- (optional)
Flame Sense
Main Harness
Circulator Motor
Table 2. Wiring Connections - Class 1 - Line Voltage.
Connection/Label
Igniter
CAI Connector
Humidifier
EAC
Neutrals
4
Board label
(see Fig. 1)
Thermostat 1st stage heat input
Thermostat 2nd stage heat input
Thermostat continuous fan input
Thermostat 2nd stage cool input
Thermostat 1st stage cool input
24 Volt ground (connected to transformer and
chassis ground)
E7
24 Volt hot
Not used
If used: 24V humidifier output
Not used
If used: Thermostat signal to heat pump
reversing valve input
If used: Thermostat Dehumidification or
Harmony Zoning input
Not used
E4
If used: Discharge air sensor
E42
Flame signal input
J2
Main valve, pressure switches, rollout, limit,
chassis ground, and 24 Vac
P79
Motor serial control interface and furnace size
select input
Board label
(see Fig. 1)
P77 – HSI
Igniter interface
J3 – CAI
3-phase AC power
HUM
Humidifier 120 Vac output
EAC
Electronic air cleaner 120 Vac output
E36, E37,
Any neutral connector can be used for:
E38, E39,
• 120 Vac Input neutral
and E40
• Transformer neutral
• Electronic air cleaner neutral
• Circulator neutral
• Humidifier neutral
Connects S9240F to:
Connects S9240F to:
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