Brooks VX TopCooler - Page 40

4. Maintenance and Repair VX TopCooler
TopCooler Poppet Speed Adjustment Part Number: 606325 Rev. A
AdjustmentProcedure
Step Action
1.
CloseeachFlowControl,showninFigure4-3,byturningtheFlowControlScrewclockwise.
2.
TurneachFlowControlScrewtwofullrevolutionscounterclockwise(thisservesastheinitialflowset-
ting).
3.
OpenthePoppetvalveusingtestsoftware.ObservethetimerequiredtofullyopenthePoppetvalve.
Thetotalcycletimeshouldbe3seconds.
4.
AdjustthePoppetspeedasnecessarytoachieveaPoppetopencycletimeof3seconds.Dothisby
turningtheCloseFlowControlScrewclockwise(speeddecreasing)orcounterclockwise(speed
increasing).RetestthePoppetuntilachievingthedesiredPoppetspeed.
5.
ClosethePoppetusingtestsoftware.ObservethetimerequiredtoclosethePoppetvalve.Thetotal
timecycletimeshouldbe3seconds.
6.
AdjustthePoppetspeedasnecessarytoachieveaPoppetclosecycletimeof3seconds.Dothisby
turningtheOpenFlowControlscrewclockwise(speeddecreasing)orcounterclockwise(speed
increasing).RetestthePoppetuntilachievingthedesiredPoppetspeed.
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