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S8701/S8702 Direct Spark
Ignition Controls
INSTALLATION INSTRUCTIONS
The S8701 is a single spark, single flame sense, direct
APPLICATION
ignition control that is compatible with dual rod systems.
S8701 and S8702 Direct Spark Ignition Controls are
The S8702 is a dual spark, dual flame sense, direct
designed for use in commercial cooking and other gas
ignition control capable of igniting and sensing flame on
heating applications which require direct ignition and flame
two separate gas burners that
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS IMPORTANT Heat If this is a replacement application, follow the Excessively high temperatures can damage the control. appliance manufacturer’s instructions, if avail- Make sure the maximum ambient temperature at the able. The manufacturer usually provides wiring control does not exceed the rating of the control, see Table diagrams, start-up and checkout instructions and 2. If the appliance operates at very high temperatures, use the service procedures f
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS Table 4. Transformer Ratings for S8701/S8702 and Wiring the S8701/S8702 Control Dual Valve Combination Gas Controls. 1. Connect system components to the S8701/S8702 terminals as shown in the wiring diagrams, Figs. 2 Minimum VA Total Valve and 3. Refer to the appliance manufacturer’s Rating (24V Current S8701/S8702 instructions for wiring any other auxiliary controls. transformer) (in amperes) (in amperes) 20 up to 0.6 0.15 2. Adjust temperature control
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS LIMIT CONTROLLER 2 3. Fit one end of another ground wire with a female 1/4 L1 in. quick connect terminal and connect it to the male 1 (HOT) quick connect 24V (GND) terminal on the S8701/ L2 TRANSFORMER S8702 control. 4. Strip the other end of the 24V (GND) wire and fasten it to the burner ground. S8702D CONTROL MODULE 5. If used with a separate flame sensor, make sure the SENSE 2 bracket is connected to the burner ground. SENSE 1 NOTE: It is not necess
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS NOTE: If the gas control has been replaced or serviced, Sequence of Operation lightoff may not be satisfactory until air has been The S8701/S8702 controls perform the following basic purged from the gas line or the gas input and functions: combustion air have been adjusted (see • Supplies power to the electronic pulse-generator manufacturer’s instructions). circuit for the spark igniter (14,000 volts, open circuit). • Allows up to 23.75 seconds (maximum
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS START THERMOSTAT CALLS FOR HEAT SAFE START CHECK. LED BLINKS RAPIDLY. SAFE START CHECK PREPURGE (J AND K MODELS ONLY) PREPURGE - J & K MODELS ONLY IF NO SPARK, B, D, J, AND K MODELS GO INTO LOCKOUT SPARK GENERATOR POWERED AFTER ONE (1) TRIAL FOR IGNITION PERIOD. TRIAL FOR IGNITION MAIN VALVE OPERATORS OPEN. ALARM CIRCUIT IS ACTIVATED. LED IS ON STEADY. SYSTEM MUST BE RESET. IF FLAME CURRENT SENSED: IF FLAME CURRENT IS NOT SENSED: (MUST BE SENSED AT BOT
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS START THERMOSTAT CALLS FOR HEAT SAFE START CHECK SAFE START CHECK. LED BLINKS RAPIDLY. PREPURGE PREPURGE - L & M MODELS ONLY (L AND M MODELS ONLY) INTERPURGE IF NO SPARK, E, F, L, AND M MODELS GO INTO LOCKOUT AFTER THREE (3) TRIAL FOR IGNITION PERIODS. TRIAL FOR IGNITION SPARK GENERATOR POWERED ALARM CIRCUIT IS ACTIVATED. LED MAIN VALVE OPERATORS OPEN. IS ON STEADY. SYSTEM WILL AUTOMATICALLY RETRY AFTER ONE (1) HOUR. IF FLAME CURRENT IS NOT SENSED: IF
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS 6. Check the flame sensor and its mounting bracket. Flame Sensor Circuit Correct the position if bent out of shape. The S8701 and S8702 provide ac power to the flame 7. Review the S8701/S8702 normal sequence of sensor which the burner flame rectifies to direct current. If operation. See START SYSTEM section. the flame signal is less than 1.0 m A dc, the system will lockout. S8701/S8702 COMPONENT CHECKS Check the flame sensing current from the sensor to
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS Low or Unsteady Flame Current Checkout After Service If the current to the S8701/S8702 is less than 1.0 m A or is Perform the following steps before leaving the job (de- unsteady, check the burner flame, flame sensor location scribed in the CHECKOUT section). and electrical connections as follows: • START SYSTEM • TRIAL FOR IGNITION PERIOD CHECK • SAFETY LOCKOUT RESET Burner Flame Also perform any other checks recommended by the The flame sensor must be
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS NOTE: BEFORE TROUBLESHOOTING, FAMILIARIZE YOURSELF START WITH THE START-UP AND CHECKOUT PROCEDURE. TURN THERMOSTAT TO CALL FOR HEAT TURN GAS SUPPLY OFF. NO CHECK LINE VOLTAGE POWER, LOW VOLTAGE TRANSFORMER, LIMIT CONTROLLERS, POWER TO UNIT THERMOSTATS AND WIRING. ALSO, AIR PROVING SWITCH ON PREPURGE (24 VAC NOMINAL) SYSTEMS (SEE FIGS. 4 AND 5). YES YES NO UNIT LOCKS OUT ON POWER UP. CHECK FOR FLAME AT EACH BURNER. IF FLAME SAFE START CHECK OK. IS P
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S8701/S8702 DIRECT SPARK IGNITION CONTROLS 11 69-1174
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Home and Building Control Home and Building Control Honeywell Inc. Honeywell Limited-Honeywell Limitée Honeywell Plaza 155 Gordon Baker Road P.O. Box 524 North York, Ontario Minneapolis, MN 55408-0524 M2H 3N7 69-1174 L.C. 4-99 Printed in Mexico www.honeywell.com
