Product Details:
Voltage: 120Vac
Pre-purge: 60sec
Flame establishing period: 10, 15 or 30 sec
Postpurge: 15 sec
Early spark termination: 5 sec

Automatic R4140L1147 programming control:
Application:
The R4140L 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.
With auxiliary equipment, also complies with Industrial Risk Insurers (formerly FIA) recommended good practices for single-burner boilers.
The R4140 directly replaces the R4150 for most applications and mounts on the same Q520A Wiring Subbase.
Low-high-low proven 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 detectorflame rod, photocell, infrared detector, or
ultraviolet detector.
Amplifier capability includes three standard models, three Dynamic Self-Check models, and one Dynamic Ampli-Check model.
R7427C 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 high fire position of the firing rate motor near the start of prepurge, and low fire position before starting ignition trials.
Provisions for connecting preignition interlocks to prove the proper conditions for startup, and for a combustion airflow switch to prove airflow throughout the operating cycle.
All models have four-wire firing rate switching circuitryfiring 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 before and during prepurge; if a flame (or a condition simulating a flame) is detected, ignition trials cannot be started and safety shutdown occurs.
Safety shutdown also occurs on (1) opening of a preignition interlock during prepurge, (2) opening of a lockout interlock (such as loss of air, or low or high fuel pressure) after 14
seconds, (3) failure to ignite the pilot, (4) failure to light the main burner, (5) loss of flame during the Run period, or (6) failure in the flame detection system (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.