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PRODUCT DATA
Copyright © 1996 Honeywell Inc. • All Rights Reserved
X-XX UL
60-2337-3
R4140G
Flame Safeguard Programming Controls
APPLICATION
The R4140G Flame Safeguard Programmers provide
flameout protection plus automatic sequencing of the burner
motor (blower), firing rate motor, ignition, pilot valve, and main
fuel valve(s) for commercial and industrial burners using gas,
oil, coal, or a combination of fuels.
FEATURES
• Approvals: Underwriters Laboratories Inc. listed or
component recognized, Canadian Standards
Association certified, and Factory Mutual approved for
automatic fired burners.
• The R4140 directly replaces the R4150 for most
applications and mounts on the same Q520A Wiring
Subbase.
• Low-high-low purge programmers.
• Field selectable main burner flame-establishing
period.
• Early spark termination (five-second ignition and five-
second pilot only) available on some models.
• Plug-in, solid state, flame signal amplifiers are color-
coded and interchangeable to allow the use of any
type of flame detector-flame rod, photocell, infrared
detector, or ultraviolet detector.
• Amplifier capability includes three standard models,
three Dynamic Self-Check models, and one Dynamic
Ampli-Check® model.
• R7247C or R7476A Dynamic Self-Check Amplifier,
when used with an ultraviolet flame detector with a
self-checking shutter (R7247C with a C7012E or F;
R7476A with a C7076), tests all electronic components
in the flame detection system (amplifier and detector)
60 to 240 times a minute during burner operation and
shuts down the burner if the detection system fails.
• R7247B Dynamic Self-Check Amplifier, when used with
a rectifying flame rod (which is considered fail-safe),
or R7248B Dynamic Ampli-Check Amplifier, when used
with a C7015A Infrared (lead sulfide) Flame Detector,
tests the flame signal amplifier at least 150 times a
minute during burner operation and shuts down the
burner if the amplifier fails.
• All models feature capability of proving low fire position
of the firing rate motor before starting ignition trials.
• Provisions for connecting preignition or start
interlocks (depending on model) to prove the proper
conditions for startup, and for a combustion airflow
switch to prove airflow throughout the operating cycle.
• All models have 4-wire firing rate switching circuitry—
firing rate can be modulated while the burner is firing,
and the firing rate motor can be driven to both low and
high fire positions during prepurge.
• Safe start check at startup and during prepurge. If
flame relay 2K is holding in at startup, the programmer
cannot be started. If a flame (or a condition simulating
a flame) is detected during prepurge, ignition trials
cannot be started and the programmer recycles.
• Safety shutdown occurs on failure to ignite the pilot or
main burner, on loss of flame during the Run period,
or if the flame detection system fails (if a self-checking
system is used).
• All relays are visible, labeled, and easily accessible.
• Alarm terminal is available to operate an external, line
voltage alarm on safety shutdown.
Contents
Application .......................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Ordering Information ........................................................... 2
Operation ............................................................................ 6
Wiring .................................................................................. 23