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S89E,F Direct Spark Ignition Control Module
PRODUCT DATA

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.

APPLICATION
The Honeywell S89E,F Direct Spark Ignition Control Modules control the ignition sequence and gas control operation in direct sparksystems used primarily on gas-fired atmospheric and power burners in residential furnaces and heating appliances.

• 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.Contents
Application ........................................................................ Features ........................................................................... Specifications ................................................................... Ordering Information ........................................................ Installation........................................................................ Wiring ............................................................................... Start-Up and Checkout ..................................................... Operation .......................................................................... Troubleshooting ................................................................ 1 1 2 2 3 4 4 6 7

® U.S. RegisteredTrademark Copyright © 2003 Honeywell International Inc. All Rights Reserved

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S89E,F DIRECT SPARK IGNITION CONTROL MODULE

SPECIFICATIONS
IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not match the listed specifications exactly. Also, this product is tested and calibrated under closely controlledconditions, and some minor differences in performance can be expected if those conditions are changed. Models: S89 Direct Spark Ignition Control Modules. Provide electronic control of direct spark ignition system on gas-fired atmospheric and power burners. S89E: 10-second maximum delay for safe start check. S89F: 38-second maximum delay for safe start check plus valve on delay. Complete DSI system alsoincludes: 120 Vac Spark Generator with 1.5A or less current draw. Q347 Spark Igniter or equivalent. Q354 Flame Sensor or equivalent. VR845, VR854, VR8450, or VR8305 Combination Gas Controls or any dual valve rated 2A or less and designed for DSI applications. 24 to 30 Vac Thermostat. HIgh Temperature Limit Controller. 24V Transformer. See Table 1 for VA rating. Electrical Ratings: Power supply:Requires two power supply connections—24 and 120 Vac, 50/60 Hz. Current at 24V input: 2.2A maximum. Valve Contacts: 2.0A maximum run, 20A maximum inrush at 24 Vac. Spark Generator Relay Contacts: 1.5A at 120 Vac, 50/60 Hz. Transformer Rating: See Table 1. Thermostat Heat Anticipator Setting: 0.2A plus gas control current. Delay Timing: S89E: Safe Start Check—10 seconds maximum. S89F: Safe Start Checkplus Valve On Delay—38 seconds maximum.

Table 1. Transformer Rating. S89 Current (in Amperes) 0.2 0.2 0.2 0.2 Gas Control Current (In Amperes) 0 to 0.6 0.6 to 1.0 1.0 to 1.4 1.4 to 2.0 20 30 40 50 Transformer VA Rating Required Transformer Model No. AT20A or AT120A AT72D or AT140A AT72D or AT140A AT87A or AT150A

Safety Lockout Timing: 4 or 11 seconds nominal. Ignition is on during...