[QuadList] VR1200 Air System

[Chill315 at aol.com]

VR-1200 B Series Air Systems Hints and Kinks
 
VACUUM
The VR-1200 had a simple system.  The biggest problem  was the vacuum 
system.  We added the Venturi to generate the vacuum and  just pulled the breaker 
on the pump.  It made the machine a lot  quieter.  Also reduced the 
maintenance.  Highly recommend installing  one.
 
The little glass jars were removed about every 50 to 100 hours of head use  
and the little balls were cleaned.  The regulators would get all gummed up  
with black dust particles and then the vacuum would start changing.  We  
also cleaned the felts in Freon so that the particles would be removed from  
them.  About every two years, they would get to the point where it was  
replacement time.  The vacuum switch never seemed to change settings.   I think 
we only adjusted it 2 or 3 times in about 10 years.
 
BEARING AIR
 
 The water trap separator built in the machine was the last in our  system  
We had a compressor with oil and water separators plus a  cooler.  Then in 
the tape area we again did traps and oil separators.   We had in the tape 
area a final regulator and then individual valves to each  machine.  Thus the 
only thing that was required was to a couple of times a  year just clean the 
water trap in case anything got past all the others.   At that time, using 
the regulator, I would check the air pressure switches on  all the machines 
to make sure that they were working.  Never required  adjustment.
 
BLOWER AIR
 
 The squirrel cage blower for head cooling required cleaning every 100  
hours or so.  It would get all the tape bits and the filter would start to  get 
a lot of junk.  Just make sure the grid goes toward the blower part as  it 
sucks from the head.  The filter will tear away from the grid.  One  thing 
that we did was to blow off the deck before each session so that the tape  
bits were removed daily before they got sucked into the  filter.
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