Regeneration Flow Cut-Off Kit
• #619926
• Reduces air compressor run times
• Designed for 7HP air compressors or less
• SFD Dryer package regenerates only when
compressor motor operating (pumping) a minimum
(2) two minute (120 seconds) cycles
Installation
• Disconnect air line from outlet port of air dryer
• Disconnect two (2) ¼” air lines from air control valve located on back of control valve
• Remove MLT from air control valve and set aside for later installation
• Remove eight (8) bolts fastening manifold to adaptor castings
• Remove manifold assembly from adaptor castings and discard
• Lubricate new O-rings and install onto manifold bosses of new manifold/valve assembly
• Position manifold/valve assembly onto adaptor castings ensuring O-rings are properly positioned in
bores
REMINDER: Make sure valves & springs remain in position in both bores of adaptor castings
• Reinstall eight (8) bolts and tighten to 45-65 in. lbs. torque
• Reinstall MLT, previously removed, onto control valve of new assembly
• Reconnect two (2) ¼” air lines previously removed to air control valve
• Connect open power lead to appropriate 120 Volt AC power source controlling compressor motor low
pressure “On” and high pressure “Off” cycles
• Re-connect air line to dryer outlet port
• Check all connects for air leaks
Troubleshooting Regeneration Cutoff Solenoid (RCS)
Regeneration Cutoff Solenoid (RCS) manages regeneration purge cut off by energizing and de-energizing
the air control valve in unison with compressor’s pressure control switch. When air compressor electric
motor runs (pumping), the RCS allows pilot air to flow to air control valve located under manifold.
During compressor “on” time, the air dryer pneumatically cycles every two minutes with Micro Logic
Timer (MLT).
When air compressor reaches cut off pressure, the electrical power to RCS will be off, which allows air
control valve to switch, cutting off pilot signal to air control valve located under manifold. The MLT
continues to cycle electrically, however, with pilot air removed from air control valve, dryer no longer
MLT (Micro Logic Timer)
#619790 not included in kit
WARNING
Read, understand and follow safety precautions and instructions in this manual and
in the labels attached to the dryer system. Failure to do so could result in serious
injury, death and property damage.
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