SEQUENCE OF OPERATIONS

APPLY POWER TO

APPLIANCE

Intelli-Vent™

Sequence of Operation

 

NO

DISPLAY ERROR CODE

 

 

 

 

 

IS FIELD WIRING

 

 

 

 

 

 

CORRECT?

 

 

1 OR

2

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

REQUEST

NO

 

 

 

 

 

 

 

 

FOR HEAT

 

 

 

 

 

 

 

 

 

PRESENT?

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

IS

NO

WAIT FOR PRESSURE

IS

NO

WAIT FOR PRESSURE

 

 

PRESSURE SWITCH

SWITCH TO OPEN

PRESSURE SWITCH

SWITCH TO OPEN

 

 

PROVEN OPEN WITHIN

 

DISPLAY ERROR

PROVEN OPEN WITHIN

 

DISPLAY ERROR

 

 

5 SECONDS?

 

NUMBER

3

5 SECONDS?

 

NUMBER

3

 

 

YES

 

 

 

YES

 

 

 

 

 

COMBUSTION

 

 

 

COMBUSTION

 

 

 

 

 

BLOWER ON

 

 

 

 

 

 

 

 

 

 

 

BLOWER ON

 

 

 

ONE HOUR AUTO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOCKOUT RESET

 

 

 

 

 

 

 

 

 

DELAY

 

IS

NO

WAIT FOR PRESSURE

IS

NO

WAIT FOR PRESSURE

 

 

PRESSURE SWITCH

PRESSURE SWITCH

 

 

SWITCH TO CLOSE

SWITCH TO CLOSE

 

 

PROVEN CLOSED

 

PROVEN CLOSED

 

 

 

 

DISPLAY ERROR

 

DISPLAY ERROR

 

 

WITHIN 5

 

WITHIN 5

 

 

 

 

NUMBER

4

 

NUMBER

4

 

 

SECONDS?

 

SECONDS?

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PREPURGE

 

 

 

 

 

 

 

 

 

IS

NO

TURN OFF INDUCER

 

 

 

 

 

 

IGNITOR

 

DISPLAY ERROR CODE

 

 

 

 

 

 

OKAY?

 

NUMBER

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TURN OFF INDUCER

 

YES

 

 

 

 

 

 

COMBUSTION

AFTER POST-PURGE

6

 

 

 

 

 

 

DISPLAY ERROR

 

 

 

 

 

 

 

BLOWER OFF

IGNITOR ON FOR

 

 

 

 

WARM-UP TIME

 

 

 

 

MAIN VALVE OPENS

 

 

 

 

YES

 

 

 

INTERPURGE

 

 

 

 

MAIN

 

 

 

 

BURNER LIGHTS

NO

LESS

 

YES

AND IS SENSED

 

MAIN VALVE CLOSES

THAN 3 TRIES

 

DURING TRIAL

 

FOR

 

FOR IGNITION?

 

 

IGNITION

 

 

 

 

YES

 

NO

 

 

IGNITOR TURNS OFF

 

 

 

 

IS

YES

LOST

3

YES

FLAME SENSE

MAIN VALVE CLOSES

LESS THAN

 

LOST?

 

TIMES?

 

 

NO

 

NO

 

 

NO IS REQUEST FOR HEAT

SATISFIED?

YES

MAIN VALVE OFF

COMBUSTION

BLOWER OFF AFTER

POST-PURGE DELAY

Please Note:

The control continually monitors internal circuits and external sensors. Error codes noted above, and those for self-diagnostic faults can be found on pages 8 and 9.

6

Page 6
Image 6
White Rodgers 37E37A-903 & 906, 37E73A-906, 37E73A-903 Sequence of Operations, Intelli-Vent Sequence of Operation

37E73A-903, 37E73A-906, 37E37A-903 & 906 specifications

Emerson 37E73A-903, 37E37A-903 & 906, and 37E73A-906 are advanced pressure transmitters known for their accuracy, reliability, and innovative technology. These devices are widely utilized in various industrial applications, including oil and gas, water treatment, and chemical processing, where precise measurement and monitoring of pressure are critical.

One of the main features of the Emerson 37E series is their robust construction, designed to withstand harsh environmental conditions. They are engineered with high-quality materials that provide durability and longevity, ensuring consistent performance over time. Their compact design allows for easy installation in tight spaces, making them versatile solutions for a range of process control systems.

The Emerson transmitters utilize advanced sensing technology that enhances accuracy and sensitivity. They offer a wide measurement range, capable of detecting both high and low-pressure levels. This capability enables operators to manage their processes more effectively, reducing the risk of system failures and operational downtime.

Another key characteristic of the 37E series is their exceptional performance in terms of stability and linearity. These transmitters provide a high level of repeatability, ensuring that measurements are consistent and reliable. This feature is particularly crucial in industries where process integrity is paramount.

The integration of digital communication protocols, such as HART and FOUNDATION Fieldbus, allows for seamless connectivity with control systems. This feature enables remote monitoring and configuration, facilitating real-time data collection and analysis. As a result, operators can make informed decisions quickly, optimizing their processes and enhancing operational efficiency.

Furthermore, the Emerson 37E series comes with various options for customization. Users can select from different pressure ranges, outputs, and materials to suit their specific application needs. This flexibility makes these transmitters highly adaptable, catering to a broad spectrum of industrial requirements.

In conclusion, Emerson's 37E73A-903, 37E37A-903 & 906, and 37E73A-906 transmitters embody state-of-the-art technology in pressure measurement. With their robust design, high accuracy, improved performance, and flexible communication options, they are reliable solutions for industries demanding precision and efficiency. Their adoption can significantly enhance process control, contributing to safer and more efficient operations in diverse applications.