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APPLICATION
S8700 Direct Spark Ignition Controls are designed for
use in a wide range of gas-fired appliance applications
that require direct main burner ignition and flame safety
control of gas burners. The S8700 is used to ignite the
main burner, sense the flame and control the gas valve.
See Table 1 for the model that best meets your
application needs.
The S8700B,E,J,L models provide single rod flame
sensing (i.e., the spark rod also acts as the flame sense
rod). The S8700D,F,K,M models provide dual rod flame
sensing (i.e., the spark rod and flame rod are separate).
The S8700J,K,L,M models provide 30-second minimum
time delay between application of 24V power to the
control and initiation of the trial for ignition period for
applications that require prepurge. All models have an
LED status indicator.
Table 1. S8700 Models.
Flame
Model
Sense
S8700B
1-rod local
S8700D
2-rod remote 1
S8700E
1-rod local
S8700F
2-rod remote 3
S8700J
1-rod local
S8700K
2-rod remote 1
S8700L
1-rod local
S8700M
2-rod remote 3
SPECIFICATIONS
Electrical
Input Voltage: 24 Vac (20.5 Vac minimum to 28.5 Vac
maximum) at 60 Hz.
Current Draw: 0.15A maximum in run mode at 24 Vac.
Thermostat Anticipator Setting: 0.15A plus actual valve load.
Valve Output: 2.0A maximum run; 6.0A maximum
inrush at 24 Vac.
Alarm Output: 0.5A maximum resistive load (Output is
positive phase, one-half wave rectified, 24 Vac).
Spark Output: 14 KV minimum into 25 picofarad
capacitive load.
® U.S. Registered Trademark
Copyright © 2000 Honeywell Inc. • All Rights Reserved
S8700B,D-F,J-M Direct Spark
Trials for
Prepurge
Ignition
(seconds)
1
0
0
3
0
0
1
30 minimum
30 minimum
3
30 minimum
30 minimum
Ignition Controls
INSTALLATION INSTRUCTIONS
Environmental
Ambient Operating Temperature: -40°F to +175°F
(-40°C to +79°C).
Relative Humidity: 5% to 95% at 95°F (35°C),
noncondensing.
Ignition Sequence/Flame Sense
Prepurge: See Table 1.
Ignition Trials to Lockout: See Table 1.
Trial for Ignition Times: 4.6, 6.6, 11.1 or 21.1 second
nominal available.
Between Trial Purge: 30 second minimum
(S8700E,F,L,M only).
Auto Reset from Lockout: 60 minutes minimum
(S8700E,F,L,M only).
Flame Failure Re-ignition Time: 0.8 second maximum
at 1 microamp flame current.
Flame Current:
Minimum Threshold: 1 microamp.
Appliance Application: 2.5 microamp minimum recom-
mended under all appliance operating conditions.
Approvals:
CSA International Design Certified to ANSI Z21.20,
Report Number C2030026.
PLANNING THE INSTALLATION
WARNING
Fire or Explosion Hazard.
Gas leaks can cause property damage,
severe injury or death.
Follow these warnings exactly:
Plan the installation using the following outline.
Plan for frequent maintenance as described in
the Maintenance section.
Review the following conditions that apply to your
specific installation and take the precautionary steps
suggested.
69- 1299
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Related Manuals for Honeywell S8700 Series
Summary of Contents for Honeywell S8700 Series
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Page 1: Specifications
Alarm Output: 0.5A maximum resistive load (Output is positive phase, one-half wave rectified, 24 Vac). Spark Output: 14 KV minimum into 25 picofarad capacitive load. ® U.S. Registered Trademark Copyright © 2000 Honeywell Inc. • All Rights Reserved 69- 1299... -
Page 2: Installation
3. Fasten the screws securely. mounted on a common bracket. (Equivalent ignition hardware may be used.) — Honeywell VR8205 Gas Valve (or equivalent) designed for DSI applications. Valve loads must be within the range listed in the Specifications section. 69-1299... -
Page 3: Auxiliary Controls
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS Table 2. Recommended Ignition Cable. Maximum Ambient 13/16 (21) Temperature Rating (50) RMS Voltage 1-1/8 Cable Type Rating (29) UL Style 3257 10,000 2-13/16 (72) Wiring the S8700 Control 3-15/16 (100) 1. Connect the system components to the S8700 3-3/8 (86) 5/17 (7) terminals as shown in the wiring diagrams, Fig. -
Page 4: Start System
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS Gas Leak Test If the gas control has been replaced as a part of the S8700 (HOT) installation, perform the following test for gas leaks. LIMIT CONTROLLER TRANSFORMER WARNING S8700E,J,L CONTROL Explosion or Fire Hazard. FLAME Gas Leaks can cause property damage, SENSE... -
Page 5: Sequence Of Operation
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS The S8700 keeps the gas control main valve open as Resetting S8700 After Safety Lockout long as there is a call for heat and sufficient flame After completing the normal ignition sequence, without current through the flame sensing circuit. If, however, proving main flame, the S8700 models will shut off the the trial for ignition period ends before the main burner spark and gas flow and go into lockout. -
Page 6: Spark Ignition Circuit
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS — Make certain that the S8700 is not in safety lockout. S8700 COMPONENT CHECKS De-energize the system by moving the temperature control setpoint below the room temperature or remove power to the S8700 control. Wait at least five Spark Ignition Circuit seconds and reenergize the system by moving the The S8700 provides high voltage spark energy to light... -
Page 7: Ignition Cable
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS START 1 HOUR AUTO RESET TIME. CALL FOR HEAT (24 VAC INPUT TO 24 VAC TERMINAL). SAFE START WAIT 4 SEC. FLAME LOCKOUT WITH SAFE START CHECK. FLAME DETECTED? CHECK/ STILL DETECTED? LED ON STEADY. (LED BLINKS RAPIDLY). -
Page 8: Burner Flame
TO 0.1 uA dc) 1. Connect an analog meter (dc microammeter scale) in series with the flame sense lead as shown in Fig. 6. Use the Honeywell W136A test meter or equivalent. Disconnect the flame sense ALARM wire from the sense terminal on the control. Con-... -
Page 9: Troubleshooting Guide
S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS CHECKOUT AFTER SERVICE TROUBLESHOOTING GUIDE Perform the following steps before leaving the site Start the system by setting the thermostat or (described in the Startup section). temperature control to call for heat. Observe the system response and establish the type of malfunction or •... - Page 10 S8700B,D-F,J-M DIRECT SPARK IGNITION CONTROLS NOTE: BEFORE STARTING TO TROUBLESHOOT THIS SYSTEM: 1. UNDERSTAND THE APPLIANCE SEQUENCE OF OPERATION AS DEFINED BY THE APPLIANCE MANUFACTURER. 2. ASSURE APPLIANCE INPUT POWER SUPPLY AND GAS SUPPLY ARE CORRECT AND TURNED ON. CHECK AND REPAIR LINE VOLTAGE POWER, LOW VOLTAGE TRANSFORMER, LIMIT WITH APPLIANCE POWERED AND GAS SUPPLY ON, SET CONTROLLERS, THERMOSTATS, WIRING, COMBUSTION AIR BLOWERS AIRFLOW TEMPERATURE CONTROL TO GENERATE A CALL FOR HEAT...
- Page 11 69-1299...
- Page 12 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 Printed in U.S.A. on recycled 69-1299 G.R. 1-00 www.honeywell.com paper containing at least 10%...