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Direct Spark Ignition Control Module
APPLICATION
The Honeywell S89E,F Direct Spark Ignition Control Modules
control the ignition sequence and gas control operation in
direct spark systems used primarily on gas-fired atmospheric
and power burners in residential furnaces and heating
appliances.
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
FEATURES
• Requires separate 120 Vac spark generator.
• S89E has 10-second maximum delay for safe start
check before ignition.
• S89F has 38-second maximum delay for safe start
check plus valve on delay before ignition.
• Available with 4 or 11 second (nominal) lockout timing.
• 100 percent shutoff for use with all heating gases.
• Ambient temperature rating is -40°F to +175°F (-40°C to
+80°C).
• Separate electrodes for spark ignition and flame
sensing.
• Uses Honeywell or any other 2A or less dual valve
combination gas control designed for Direct Spark
Ignition (DSI) applications.
• Locks out system after trial for ignition if main burner
fails to ignite.
• Flame rectification principle used to monitor flame;
false flame signals resulting from short to ground
results in safety shutdown.
• After safety shutdown, S89E and F can be reset from
the thermostat.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Wiring ...............................................................................
Start-Up and Checkout .....................................................
Operation ..........................................................................
Troubleshooting ................................................................
S89E,F
PRODUCT DATA
Contents
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68-0066-4
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Summary of Contents for Honeywell S89E
- Page 1 • After safety shutdown, S89E and F can be reset from and power burners in residential furnaces and heating the thermostat.
- Page 2 If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care...
- Page 3 S89E,F DIRECT SPARK IGNITION CONTROL MODULE Approvals: CSA International Certified: 158158-1047805. Underwriters Laboratories Inc. Component Recognized: File No. MP268, Guide No. MCCZ2. 2 (51) 3/8 (10) (22) 7/8 (22) 3/16 IN. Q.C. (5) 1/4 IN. Q.C. (1) 5-13/16 (132) 3-3/8 (86) 1/4 IN.
- Page 4 Always disconnect the external guidelines that follow. timer when using an S89E or F. To disconnect the timer: a. Turn off power. b. Cut the two leadwires at the external timer.
- Page 5 • CONNECT L2 TO THE WHITE LEAD. OTHERWISE THE S89 WILL NOT DETECT THE FLAME AND WILL LOCK OUT. FACTORY TEST TERMINAL. DO NOT USE. M19836 Fig. 2. S89E typical hookup in direct spark control system. See Fig. 8 for control system ladder diagram. Check Out S89 NOTE: If the gas control has been replaced or serviced,...
- Page 6 11. Gas control closes. Once the S89 locks out, it must be reset before the system will 12. The module begins the safe start check (S89E: 10 operate. To reset, set the thermostat below room temperature, seconds maximum) or safe start check plus valve on...
- Page 7 S89E,F DIRECT SPARK IGNITION CONTROL MODULE On every call for heat, the S89 performs a safe start check. If If flame is proved, the gas control remains open and the a flame or a flame simulating condition is present, the S89 burner on until the call for heat ends.
- Page 8 S89E,F DIRECT SPARK IGNITION CONTROL MODULE IMPORTANT 3. Set the thermostat to call for heat. 1. The following service procedures are provided as a 4. Reset the S89 by removing power to the module for 45 general guide. Follow appliance manufacturer ser- seconds.
- Page 9 S89E,F DIRECT SPARK IGNITION CONTROL MODULE START REVIEW NORMAL OPERATING SEQUENCE. TURN GAS SUPPLY ON. TURN THERMOSTAT UP TO CALL FOR HEAT. CHECK LINE VOLTAGE POWER. LOW VOLTAGE TRANSFORMER, POWER TO S89 (24 VAC LIMIT CONTROLLER, THERMOSTAT AND WIRING. ALSO, AIR AND 120 VAC NORMAL) PROVING SWITCH ON PREPURGE SYSTEMS (SEE WIRING HOOKUPS.)
- Page 10 1. Connect a meter, set to the dc microammeter scale, in MULTIPURPOSE METER series with the flame sensor as shown in Fig. 6. Use the VALVE VALVE (GND) Honeywell W136 Test Meter or equivalent. Connect the DISCONNECT WIRE FROM meter as follows: SENSE 24V (GND) a.
- Page 11 (BURNER) SPARK GENERATOR WHITE BLACK FLAME SENSOR SENSE SENSOR CIRCUIT SAFE START CHECK CIRCUIT SPARK IGNITER RELAY TIMING CIRCUIT DUAL VALVE VALVE VALVE (GND) WIRING EXTERNAL TO S89 M19842A WIRING INSIDE S89 Fig. 8. S89E simplified control system schematic. 68-0066—4...
- Page 12 S89E,F DIRECT SPARK IGNITION CONTROL MODULE (HOT) ON-OFF LIMIT SWITCH CONTROL COMBUSTION AIR BLOWER (HOT) COMBUSTION AIR PROVING ALTERNATE AIR BLOWER SWITCH LIMIT RELAY 24 V 24 V (GND) THERMOSTAT SPARK SPARK IGNITER BLUE IGNITER RELAY BLUE (BURNER) SPARK GENERATOR...