Installation Sheets Manual
121
Gas Combustion Combination Controls and Systems
G
Technical Bulletin
G891
Issue Date
0596
©
1996 Johnson Controls, Inc.
1
Part No. 24-8143-243, Rev. A
Code No. LIT-121265
The G891 Pulse Ignition Control is a microprocessor-based, direct spark
ignition control that initiates combustion for the high efficiency pulse
furnace. The G891 is designed for ignition of natural, Liquefied
Petroleum (LP), manufactured, mixed, or LP gas-air mixtures.
The G891 also provides:
•
sequencing of ignition source and supervision of burner operation
•
four additional ignition trials in the event successful ignition is not
accomplished on the initial trial
•
complete ignition sequence retry after 60 minute shutoff period
•
inducer motor control
•
thermostat contact monitoring
•
system operating status LED that assists in system troubleshooting
•
keyed wiring connector
All G891 applications must use redundant gas valves. Any application
over 400,000 Btu/hr must be approved in advance by Johnson Controls
Application Engineering.
G891 Pulse Ignition Control
Application
