Johnson Controls G861 Series Manuals

1 pdf manual(s) Johnson Controls G861 Series for free download (Document Types: Technical bulletin)

Johnson Controls G861 Series Technical bulletin [PDF] (12 pages)

  • Identifier: id-1704726
  • Brand: Johnson Controls
  • Device: G861 Series Controller
  • Type: PDF
  • Key Aspects: Package Contents and Accessories List, Routine Functionality Testing, Risk Mitigation and Accident Prevention
  • UPD Date: 28.06.2026
  • Source File: 1732483.pdf
  • Pages: 12
  • Description: Owner’s guide for the Johnson Controls G861 Series.
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  • 2 G—G861 Series Integrated Function Direct Spark Ignition Control Technical Bulletin Table 1: Specifications Ignition Type Direct Ignition Source High voltage spark, capacitive discharge High Voltage Cable Length 1,220 mm ( 48 in.) maximum Flame Detection Means Flame rectification Flame Detection Types Remote sensing Minimum Flame Current Flame Threshold Current (ITH) Insufficient Flame Marginal Flame Good Flame 0.250 microampere ± 25% Flame current
  • G—G861 Series Integrated Function Direct Spark Ignition Control Technical Bulletin 3 The following conditions occur in normal control operation: • Prepurge--Initial time delay between thermostat contact closure and trial for ignition. • Trial-for-Ignition Time--Maximum time period that the main gas valve and igniter energizes in an attempt to light the main burner. • Interpurge--Time period between trials for ignition when both the gas valve and
  • 4 G—G861 Series Integrated Function Direct Spark Ignition Control Technical Bulletin Start Inducer on Inducer off Prepurge Run Interpurge Yes No Yes No Yes Yes Flam eout? Yes No No Postpurge No End Thermostat calls for m anual fan (G) No Run - m anual fan speed Thermostat call for heat Pressure switch open? Yes Retry m ode 60 m inute delay No Yes Pressure switch closed? Third trial? Trial for ignition Sixteenth flam eout? Flam e sensed? Circulator/Blo
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Installation Sheets Manual 121 Gas Combustion Combination Controls and Systems Section G Technical Bulletin G861 Issue Date 0699 © 1999 Johnson Controls, Inc. 1 Part No. 24-8143-553, Rev. A www.johnsoncontrols.com Code No. LIT-121920 Figure 1: G861 Integrated Function Direct Spark Ignition Control The G861 is a microprocessor-based, 100% shutoff, direct spark, and remote flame sense, integrated function ignition control. The G861 responds to inputs from the thermostat, high limit switch, pressure switch, and flame sensor. It provides outputs for timing and sequencing of the main gas valve, induced draft motor, circulator/blower, and spark igniter. The G861 utilizes quick-connect terminals for all off board connections, except thermostat inputs and spark output. The thermostat inputs are connected to a terminal strip with screw terminals and the spark output is connected by a rajah, spike, or 1/4 in. male tab-type spark connector. All G861 applications must use redundant gas valves and the pressure switch must carry main valve current. Any application over 117 kW (400,000 Btu/hr) must be approved in advance by Johnson Controls Application Engineering. G861 Series Integrated Function Direct Spark Ignition Control Application

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