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Honeywell S8910U Installation Instructions And Safety Information

Universal hot surface ignition module
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SUPER TRADELIN E
Installation Instructions for the Trained Service Technician.
APPLICATION
The SUPER TRADELINE® S8910U Universal Hot
Surface Ignition Module is designed to provide easy field
replacement for a wide range of hot surface ignition
modules manufactured by Honeywell, Robertshaw and
White-Rodgers. The S8910U Module provides operating
control of a direct ignition system using a 120 Vac hot
surface igniter. The S8910U replaces existing flame
rectification type hot surface ignition modules with the
following characteristics:
• 120 Vac (up to 5A) timed warmup hot surface ignition
elements.
• Single rod (local sense) or dual rod (remote sense) hot
surface ignition.
• One or three ignition trials per call for heat.
• Four-second or seven-second ignition trials.
• Prepurge of 32 seconds or less.
• Up to 96 seconds between trial purge times (three-trial
mode only).
• Natural or LP gas.
The S8910U is not designed to replace:
• Intermittent pilot ignition controls.
• Direct spark ignition controls.
• Proven 120 Vac hot surface ignition controls.
• 24 Vac element hot surface ignition controls.
• 240 Vac input/120 Vac element hot surface ignition
controls.
• 120 Vac timed warmup hot surface ignition controls
with:
—Ignition trial time shorter than four seconds.
—Ignition trial time longer than twelve seconds.
—Edge connectors rather than male quick-connects.
The SUPER TRADELINE® S8910U package contains the
S8910U control, and easy-to-use instructions, and the
accessories required to adapt the existing hot surface
ignition module. The accessory bag assembly includes the
White-Rodgers adapter, Robertshaw ground lead, four
1/4 in. female .032 quick-connects, one 3/16 in. female
.032 quick-connect, four selection tabs and seven wire
labels. The wiring labels are included to assure proper
marking of the wires attached to the existing module.
A complete list of the specific Honeywell and other
modules that the SUPER TRADELINE ® S8910U is
designed to replace is provided in Tables 1 through 3.
®U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved
S8910U Universal Hot
Surface Ignition Module
®
NOTE: The S8910U is intended to replace only defective
WARNING
EXPLOSION HAZARD. CAN CAUSE
INJURY OR EQUIPMENT DAMAGE.
The S8910U can only be used for direct replace-
ment. Check Tables 1 through 3 before replacing
an existing hot surface module with the S8910U. If
the existing module is not listed, do not use the
S8910U to replace it. Always use the selection tab
specified in Tables 1 through 3 for the existing
module being replaced. Replacing with an unlisted
module or using a selection tab not specified can
result in appliance malfunction.
Electrical Ratings:
Control Voltage: 24V, 60 Hz.
Maximum Valve Contact Rating: 2A.
Current Draw: .4A plus valve load.
Hot Surface Igniter Voltage: 120 Vac, 60 Hz.
Contact Rating At 120 Vac: 5A.
IMPORTANT
Hot Surface Igniter or Igniter-Sensor:
Norton Model 201 or 271 or equivalent.
NOTE: If an igniter other than a Norton Model 201 or 271
X-XX UL
INSTALLATION INSTRUCTIONS
ignition controls. The service technician should
make sure that the other parts of the appliance
and control system operate safely and reliably
before replacing the ignition control.
Use the S8910U only in a 60 Hz system. Be sure
the system is not 50 Hz.
is used, the igniter must meet the following
minimum specifications required over the life of
the igniter:
• Igniter must reach 1832°F (1000°C) within
34 seconds with 102 Vac applied.
• Igniter must maintain at least 500M ohms
insulation resistance between the igniter
leadwires and the igniter mounting bracket.
• Igniter must not develop an insulating layer
on its surface (over time) that would prevent
flame sensing.
• Igniter surface area immersed in flame must
not exceed one-fourth of the grounded area
immersed in flame. This would prevent flame
sensing.
• Igniter current draw at 132 Vac must not
exceed 5A.
69-0845-2

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  Summary of Contents for Honeywell S8910U

  • Page 1 • Direct spark ignition controls. IMPORTANT • Proven 120 Vac hot surface ignition controls. Use the S8910U only in a 60 Hz system. Be sure • 24 Vac element hot surface ignition controls. the system is not 50 Hz. • 240 Vac input/120 Vac element hot surface ignition controls.
  • Page 2 1.5 seconds maximum. Table 1. White-Rodgers Control to Honeywell S8910U Cross Reference. NOTES: This list is for reference only. Honeywell reserves the right to add or delete models at any time, based on new or updated information. White-Rodgers product information was obtained from the 1991 White-Rodgers Product Catalog (R3700).
  • Page 3 S8910U UNIVERSAL HOT SURFACE IGNITION MODULE Table 1. White-Rodgers Control to Honeywell S8910U Cross Reference (Continued). NOTES: This list is for reference only. Honeywell reserves the right to add or delete models at any time, based on new or updated information.
  • Page 4 The S8910U and the original control lockout times are different. The S8910U lockout time is within the design tolerance lockout time of the original control. The lockout time of the S8910U is shorter than the original control. Be sure to observe the appliance operation under a variety of input conditions to assure reliable operation.
  • Page 5: Review The Installation

    The S8910U and the original control lockout times are different. The S8910U lockout time is within the design tolerance lockout time of the original control. The lockout time of the S8910U is shorter than the original control. Be sure to observe the appliance operation under a variety of input conditions to assure reliable operation.
  • Page 6: Corrosive Chemicals

    Mount New Ignition Module them could damage the components or cause a hazardous condition. Mount the S8910U Module in the same location as the old 2. Check Tables 1 through 3 to confirm that the module. Protect the module from exposure to water,...
  • Page 7 Only trained professional gas appliance service Install selection tab technicians should install and check out the Four selection tabs are included with the S8910U. See S8910U and selection tabs. Use only the selection Tables 1 through 3. Select the correct tab for the system tab specified in Tables 1 through 3 for the existing and separate the tab from the other three tabs.
  • Page 8 Remove quick-connect and replace with the included 1/4 in. quick-connect. Use green adapter cable (provided) to connect S8910U GND (BURNER) terminal to chassis ground. Do not use the S8910U VALVE (GND) terminal. VALVE (GND) and 24V (GND) are interconnected in the appliance wiring.
  • Page 9 MAKE SURE L1 AND L2 ARE NOT REVERSED. ALTERNATE LIMIT CONTROLLER LOCATION. REMOVE JUMPER QUICK-CONNECT FROM S8910U. CUT WIRE AT CIRCUIT BOARD AND DISCARD. USE ADAPTER PLUG WITH BLACK AND ORANGE WIRES (SUPPLIED). CUT 3/16 IN. QUICK-CONNECT OFF WIRE AND REPLACE WITH 1/4 IN. QUICK-CONNECT (SUPPLIED).
  • Page 10 SENSE ROD WILL BE PRESENT IF REMOTE SENSE HS780 MODEL. SEE TABLE 3. WHEN HS780 IS A REMOTE SENSE MODEL, REMOVE JUMPER QUICK-CONNECT FROM S8910U. CUT WIRE AT CIRCUIT BOARD AND DISCARD. CONNECT FLAME ROD LEAD WIRE TO SENSE. SEE TABLE 2.
  • Page 11: Startup And Checkout

    SENSE ROD WILL BE PRESENT IF REMOTE SENSE S89/S890 MODEL. SEE TABLE 3. WHEN S89/S890 IS A REMOTE SENSE MODEL, REMOVE JUMPER QUICK-CONNECT FROM S8910U. CUT WIRE AT CIRCUIT BOARD AND DISCARD. CONNECT FLAME ROD LEAD WIRE TO SENSE. SEE TABLE 3.
  • Page 12: Operation

    Check the burner flame condition as shown in Fig. 6. The S8910U is a direct ignition control used with a Do not relocate the hot surface igniter or flame rod. 120 Vac timed warmup hot surface igniter. The control f.
  • Page 13 S8910U. When the After prepurge, the S8910U energizes the igniter to start S8910U is used in an atmospheric system, the call for heat the igniter warmup. The module energizes the hot surface energizes the module.
  • Page 14: Burner Operation

    100,000 to 200,000 and the main burner (burner ground). The S8910U flame cycles per year. Such heavy cycling can wear out the sensing circuit detects the flame current and holds open gas control in one to two years.
  • Page 15: Ignition System Checks

    Contact the normal run. appliance manufacturer if the temperature • One flash indicates the S8910U is in an ignition lockout exceeds the rating of the igniter or sensor. mode. The most probable cause is the main burner •...
  • Page 16 CHECK WIRES TO IGNITER. IF OK, REPLACE IGNITER. MAIN BURNER LIGHTS • CHECK FOR 24 VAC ACROSS VALVE TERMINALS ON S8910U DURING TRIAL FOR IGNITION TIMING. IF NO VOLTAGE, REPLACE S8910U. • CHECK ELECTRICAL CONNECTIONS BETWEEN S8910U AND GAS CONTROL.