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S89E,F DIRECT SPARK IGNITION CONTROL MODULE
AIR
PROVING
SWITCH
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
ALTERNATED LIMIT CONTROLLER LOCATION.
3
IMPORTANT:
• CONNECT L1 TO THE BLACK LEAD.
• CONNECT L2 TO THE WHITE LEAD. OTHERWISE THE S89 WILL NOT DETECT THE FLAME AND WILL LOCK OUT.
4
FACTORY TEST TERMINAL. DO NOT USE.
Fig. 3. S89F typical hookup in direct spark control system. See Fig. 9 for control system ladder diagram.
10. Turn off gas supply.
11. Gas control closes.
12. The module begins the safe start check (S89E: 10
seconds maximum) or safe start check plus valve on
delay (38 seconds maximum) after which the igniter
starts and gas control opens.
13. Time system until gas control closes. S89 is now in
safety lockout. The lockout time should be within the
specifications in Table 2.
14. Open gas supply. System remains off and no gas flows
to the main burner.
Table 2. S89 Lockout Times.
Lockout Time
Shown on S89
Module
Minimum
4 seconds
3.0 seconds
11 seconds
8.0 seconds
68-0066—4
THERMOSTAT OR
CONTROLLER
COMBINATION
AIR BLOWER
RELAY
COMBUSTION AIR
BLOWER MOTOR
DUAL VALVE
COMBINATION
S89F GAS PRIMARY
GAS CONTROL
VALVE
VALVE (GND)
24V
24V (GND)
GND (BURNER)
4
BLUE
WHITE
120 V SPARK
GENERATOR
Safety Lockout Time
Maximum
5.5 seconds
15.0 seconds
2
TRANSFORMER
L2
L1
(HOT)
SENSE
BLACK
3
IGNITER
GROUND
Resetting S89 After Safety Lockout
Once the S89 locks out, it must be reset before the system will
operate. To reset, set the thermostat below room temperature,
wait at least 45 seconds, then turn the thermostat up to call for
heat. The system should start normally. If adjusting the
thermostat does not reset the S89, turn off power to the
appliance for 45 seconds and then turn it on.
Final Checkout
With power and gas supply on, set thermostat to call for heat
and observe operation through at least one complete cycle to
make certain that all controls are operating safely.
OPERATION
The S89 is powered by a 24V transformer. It operates in
response to a call for heat from the thermostat.
6
LIMIT
CONTROLLER
L1
(HOT)
1
L2
FLAME
SENSOR
BURNER
M19837
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