20
VAPORMIST
®
MAINTENANCE
The best way to determine how often your particular
system will need maintenance is to remove the cover
and inspect it after its first three months of duty.
Potable water carries a variety of minerals and other
materials in a mix that varies from location to location.
This variation in water quality, combined with the hours
of operation and duty cycle, will determine your own
unique maintenance schedule.
Water quality makes a difference
1. Light to moderately hard water (2 to 10 grains
hardness per gallon) requires:
• Annual cleaning
• Regular skimming
2. High mineral content water (more than 10 grains
hardness per gallon) requires:
• Cleaning frequency determined by use and
water quality
• Regular skimming
• Periodic drain and flush cycles
3. DI/RO water (VAPORMIST DI models)
requires:
• No regular cleaning (regular inspections
are advised)
• No regular skimming or drain and flush
cycles
• Regular verification that water processing
equipment is operating correctly. The
presence of chlorides in improperly
processed DI water will eventually cause
pitting and failure of the tank and its
components.
4. To dramatically reduce mineral accumulation inside
the standard water models, use softened
water. (Solids, like silica, are not removed in the
softening process.)
Standard water models (VAPORMIST)
Proper skimming, draining and flushing
1. Skimming will remove most water impurities at the
surface, ensuring proper surface tension and an
even boil. Skimming will remove most entrained
contaminants that have not yet precipitated as
scale.
2. Draining and flushing will remove entrained
contaminants and assist in removing precipitated
contaminants like scale and silica.
To inspect and service standard water models
1. Remove the evaporating chamber
• Remove the two fasteners on each side of
the cover enclosure (see figure below)
• Remove the enclosure.
• Do not remove the electrical panel cover
or heater terminal cover until electrical
power is disconnected. Safety first.
• If the VAPORMIST has an SDU mounted
directly above it, the SDU cover must be
removed before removing the humidifier
cover.
• If the tank is hot, cool it down by moving
the valve lever located on the back of the
drain valve to the manual open position –
the fill valve will eventually open allowing
cool water to run through the tank until it is
cool enough to handle.
• Shut off the water supply.
• Shut off the electrical supply.
• Allow the tank to completely drain.
• Disconnect the fill line at the supply side of
the fill valve.
• Disconnect the electrical plugs between the
tank components and the back of the
electrical panel (includes: power plug, fill
plug, drain plug, water level control plug,
tank temperature sensor plug and thermal
trip plug). DISCONNECT BY PULLING ON
PLUG HOUSING. DO NOT DISCONNECT
BY PULLING ON CORD OR WIRES.
• Disconnect the drain union on the back left
corner of the frame.
• Disconnect the steam supply hose from the
top of the tank.
• Lift the tank foot above the frame flange and
slide the tank assembly forward toremove.
Cover enclosure
screw cap detail
OM-778-3
VM99-C-0302.pdf 20 11/19/2009 9:51:32 AM
(36 pages)
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