S9240F2051 MODULATING INTEGRATED FURNACE CONTROL
69-2807—01 4
.
4-position screw terminal block
(#5 screw)
Outdoor Sensor
(optional)
E4
If used: Outdoor air sensor
Discharge Air Sensor
(optional)
If used: Discharge air sensor
Straight Spade Quick Connect Flame Sense E42 Flame signal input
4-position screw terminal block
(#5 screw)
R
OUTDOOR
EQUIPMENT
24 Vac supply from transformer
I + Communication High connection
I - Communication Low connection
C Common 24 Vac return to transformer
4-position screw terminal block
(#5 screw)
R
INDOOR
EQUIPMENT
24 Vac supply from transformer
I + Communication High connection
I - Communication Low connection
C Common 24 Vac return to transformer
2-position screw terminal block
(#5 screw)
I + (optional)
E33
Auxiliary Communication High connection
I - (optional) Auxiliary Communication Low connection
12-pin connector (male terminals) Main Harness
J2
Main valve, pressure switches, rollout, limit,
chassis ground, and 24 Vac
6-pin connector (male terminals) Circulator Motor
P79
Motor serial control interface and furnace size
select input
Table 2. Wiring Connections - Class 1 - Line Voltage. (Continued)
Terminal Type Connection/Label
Board label
(see Fig. 1) Connects S9240F to:
2 pin connector (male terminals) Igniter P77 – HSI Igniter interface
3-pin connector (male terminals) CAI Connector J3 – CAI 3-phase AC power
Straight Spade Quick-connect Humidifier HUM Humidifier 120 Vac output
EAC EAC Electronic air cleaner 120 Vac output
L1 connectors E34, E35, and
E41
Any L1 connector can be used for
• 120 Vac Main input
• Transformer 120 Vac output
• Circulator 120 Vac output
Neutrals E36, E37,
E38, E39,
and E40
Any neutral connector can be used for:
• 120 Vac Input neutral
• Transformer neutral
• Electronic air cleaner neutral
• Circulator neutral
• Humidifier neutral
Table 3. Jumpers.
Jumper
Board label
(see Fig. 1) Action:
W915 - 2-Stage Compressor W915 UNCUT: Single stage compressor (factory default)
CUT: 2-stage compressor
W951 - Heat Pump W951 UNCUT: Compressor heating disabled (factory default)
CUT: Compressor heating enabled
W914 - Dehumidifier W914 UNCUT: Dehumidifying operation disabled
(factory default)
CUT: Dehumidifying operation enabled
Table 1. Wiring Connections - Class 2 - Low Voltage. (Continued)
Terminal Type Connection/Label
Board label
(see Fig. 1) Connects S9240F to:
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