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66-2001—2
B. M. • Rev. 9-93 • ©Honeywell Inc. 1993 • Form Number 66-2001—2
R7795A,B,C,D
Flame Safeguard
Primary Controls
The R7795 Flame Safeguard Primary Control
provides flameout protection plus automatic
control of commercial and industrial gas and
oil burners. Models provide intermittent pilot
or interrupted pilot with delayed main valve.
CONTENTS
Specifications ................................................. 2
Ordering Information ..................................... 2
Detailed Operating Sequence ........................ 4
Installation ..................................................... 8
Checkout ....................................................... 11
Troubleshooting ........................................... 17
Service .......................................................... 19
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Field selectable ten or four second trial for pilot
flame ignition.
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Powered alarm terminal to operate an external line
voltage alarm on safety lockout.
■
R7795 models are available with either intermittent
pilot (interrupted ignition) or interrupted pilot and
delayed main valve. See Table 2.
■
Run-Test switch on interrupted pilot/delayed main
valve models.
■
Safe-start feature prevents start-up with lockout if
flame or a flame simulating failure exists.
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Recycle or lockout on flame failure is field selectable.
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Safety switch must be manually reset after lockout.
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Meets Underwriters Laboratories, Canadian Stan-
dards Association, and Factory Mutual Approved
standards.
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Integral solid state color-coded flame amplifiers:
R7795A,C for ultraviolet detection systems (purple).
R795B,D for rectification detection systems (green).
See Table 1.
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Solid state plug-in ST95A Purge Timers provide
prepurge timings of 1.5, 7, 10, 30, 60, or 90 seconds.
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Includes terminals for connection of a line voltage
airflow switch to prove airflow from the start of
prepurge through the run period.
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Mounts on a Q795A Subbase with two captive
screws. All electrical connections are automatically
provided between the device and subbase. Wiring
terminals are accessible for testing.
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Meter jack on amplifier board for measuring flame
signal with system in operation.
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Internal light-emitting diode (LED) indicates pres-
ence of flame signal.