Introduction; Theory Of Operation - Raven Case IH 50 Series Installation And Operation Manual

I NTRODUCTION
CHAPTER
C H A P T E R 2
2
Thank you for purchasing the boom recirculation system. This system is designed to allow the equipment operator
to prime the boom or agitate chemical in the boom plumbing without spraying chemical on the ground. This
system allows the operator to adjust the recirculation flow based upon the spray system or the chemical needs
and will automatically disengage when normal application is started or if a chemical injection system is detected.
This manual applies to the following machines:
Make. Case IH
Model. 3050 and 4050 series sprayer platforms with AIM Command Flex II (ACF II)
Boom Configurations. 90' - 135' Booms
System Requirements:
• Must have the CNH RCM-Sprayer ECU
• Boom plumbing kit installed
• Product cable with electronic recirculation valve connection required
• Recirculation authorization code (077-0180-296)

THEORY OF OPERATION

When the recirculation system is active, the spray system is not spraying, and NCVs are off, the electric return valve
opens fully. The main pump circulates the spray liquid from the main tank through the existing supply plumbing to
the section valves.
Section valves actuate open in pairs, starting with the outermost left and right sections and progressing inward.
The section valves turn on and off to circulate fluid for the user-defined auto-operation time for each section of
the spray system. This keeps the liquid circulating, allowing the system to purge any air, break up chemical
deposits, and agitate any separated chemicals through the system without having to spray out of the nozzles.
Product returns through the throttling valve and electric return valve until the electric return valve automatically
turns off when spraying resumes. The throttling valve is used to dampen the pressure spike affects of the electric
return valve closing when spraying resumes. The individual recirculation hand valves should be used to separate
sections when not using NCVs (Bypass and High Flow/High Flow VP Modes) and to isolate boom plumbing
sections if maintenance is required or damage to a plumbing component occurs that causes a leak.
Introduction: Theory of Operation 5