SPX Waukesha Cherry-Burrell Votator II, Operation And Maintenance Manual

Page: 43 / 84

Waukesha Cherry-Burrell Maintenance
October 2005 95-03057 Page 43
Inspection of Chrome Plated Nickel or
Stainless Steel Tubes
During each inspection of the scraper blades, inspect the
inside surface of the tube for scoring, gouging, and
roughness. When the surface of the plating is damaged or
worn through, it may be rechromed to original
specifications by Waukesha Cherry-Burrell. WCB has the
equipment and product knowledge to repair the tube back
to factory specifications and determine if the tube will
comply with ASME specifications.
CAUTION: Acid cleaners are not recommended
for chrome plated nickel heat transfer tubes.
Cleaners should be compatible with the elastomers
in the heat exchanger.
Inspection of Stainless Steel Tubes
During each inspection of the scraper blades, inspect the
inside surface of the tube for scoring, gouging, and
roughness. Shallow score marks, shallow gouges, and
roughness can be taken out by honing the tube followed by
polishing. Depending on the damage to the tube,
Waukesha Cherry-Burrell may be able to rehone the tube
to comply with ASME code specifications.
Jacket Side
For Units Using Steam, Water, Or Liquid
The jacket side of the heat transfer tube has a sealed cover
that allows the media flow to circulate around the tube. If
it becomes coated with foreign matter and heat transfer is
reduced, it can be cleaned by pumping a detergent solution
compatible with the carbon steel jacket at a rate of about
100 gpm. The frequency of this cleaning process will vary
greatly from one installation to another.
For Units Using Refrigerant
The jacket side of the heat transfer tube will become
fouled with oil and sludge over time and prevent efficient
heat transfer. This tube does not have a sealed flow spiral
and can be cleaned by removing it from the jacket. It
should be removed for cleaning every 12 to 18 months.
NOTE:
If you plan to clean the tube with anything other
than the materials and methods mentioned previously,
please contact Waukesha Cherry-Burrell.
Cleaning the Flanges
Remove the O-rings and clean the grooves thoroughly of
all residue and buildup. Care must be taken in cleaning the
flanges, as they are part of the seal mechanism of the unit.
Install new O-rings any time the unit is disassembled.
NOTE:
Replace the O-rings every 12-18 months.
Lubricate the O-rings.
Leak Testing
Each cylinder is thoroughly tested for leaks at the factory.
It is necessary to check for leaks in the refrigeration
system any time the piping is opened to the atmosphere for
maintenance or repair.
WARNING: Do not open valves or check for
leaks until the electrical system checkout is
completed. Personnel must wear safety goggles and
protective clothing.