S8910U3000
UNIVERSAL HOT SURFACE IGNITION MODULE
READ BEFORE INSTALLING
Installation of this product must be performed by a trained
and qualified service technician.
APPLICATION
The S8910U Universal Hot Surface Ignition Module is
designed to provide easy field replacement for a wide
range of hot surface ignition modules manufactured by
Resideo, 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
—
Ignition trial time shorter than four seconds.
—
Ignition trial time longer than twelve seconds.
—
Edge connectors rather than male quick-connects.
The 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,
and nine 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 Resideo and other modules
that the S8910U is designed to replace is provided in
Tables 1 through 3.
INSTALLATION INSTRUCTIONS
NOTE: The S8910U is intended to replace only defective
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.
WARNING
EXPLOSION HAZARD. CAN CAUSE INJURY OR
EQUIPMENT DAMAGE.
The S8910U can only be used for direct
replacement. 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 refer to the
cross-reference table for proper DIP switch
settings.
Electrical Ratings:
Control Voltage: 24 V, 60 Hz.
Maximum Valve Contact Rating: 2 A.
Current Draw: 0.4 A plus valve load.
Hot Surface Igniter Voltage: 120 Vac, 60 Hz.
Contact Rating at 120 Vac: 5 A.
IMPORTANT
The S8910U is designed for 60 Hz applications.
Timings change by 20 percent in 50 Hz applications.
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 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 the
selected warm up time of 7, 17, 34 or 45 seconds with
102 Vac applied.
• Igniter must maintain at least 500M ohm 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.
Sensor:
Separate sensor required for remote sensing applications.
34-00008EFS-03