Honeywell ST7800A Pre-Purge Timer Cards

Honeywell purge timers let you purge unburned fuels from the combustion chamber. The plug-in cards install easiy into the 8700 series relay modules.

Key Specifications

  • Plug-in cards provide pre-purge timing (pre-ignition purge) for Honeywell RM7800 series relay modules and controls
  • Available from two seconds to 45 minutes
  • CSA, FM, UL approved

Specifications, Manuals, and Supporting Literature

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Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Models Available to Buy Online at
2-Second Pre-Purge ST7800A1005 1.5-Minute Pre-Purge ST7800A1062
7-Second Pre-Purge ST7800A1013 2.5-Minute Pre-Purge ST7800A1070
10-Second Pre-Purge ST7800A1021 4-Minute Pre-Purge ST7800A1088
30-Second Pre-Purge ST7800A1039 6-Minute Pre-Purge ST7800A1096
60-Second Pre-Purge ST7800A1054  


See our full combustion safety and efficiency instrumentation offering.

Flame safeguard systems
Flame safeguard systems
Plug-in modules
Keyboards, purge timer cards,
and annunciator panels
Flame detectors
Flame detectors
Flame amplifiers
Flame signal amplifiers
Pressure controls
Pressure controls
Temperature controls
Temperature controls
valves and motors
Shutoff valves, control valves,
and actuators
combustion efficiency analyzers
Combustion efficiency and
emissions analyzers



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