33
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Tap/softened water
Table 33-1:
Skim time settings
Dip switch
Skim time
4
5
Option
Off
Off
3 seconds
Option
On
Off
9 seconds
Factory
settings
Off
On
32 seconds
Option
On
On
45 seconds
The best way to determine how often your humidifi er needs maintenance is to
remove the tank cover and inspect it for mineral deposits after three months
of duty. Hours of operation and duty cycle will determine your maintenance
schedule, as will water quality.
WATER QUALITY AND MAINTENANCE
Maintenance requirements vary with water quality, because tap and softened
water carry a variety of minerals and other materials in a mix that varies from
location to location. Very hard (high mineral content) water requires more
frequent cleaning and drain/fl ush cycles than water with low mineral content.
Softened water signifi cantly reduces mineral accumulation inside the humidifi er.
Note: Solids, like silica, are not removed in the softening process.
SKIM DURATION
Skim duration determines the quantity of water skimmed with each fi ll cycle
and is fi eld adjustable:
• LW series controller, dip switches on controller board (see Table 33-1)
• Optional Vapor-logic controller, keypad/display or web interface (see the
Vapor-logic Installation and Operation Manual
)
Skimming reduces the need for frequent humidifi er cleaning. Each time the
tank refi lls, it fi lls to a level just above the lip of the skim/overfl ow fi tting. A
portion of the fi ll water fl ows out of the skim/overfl ow fi tting to the drain, which
fl ushes minerals left by the previous evaporating cycle and skims away surface
residue.
Both humidifi er cleaning and heated water fl owing to the drain are operational
costs. DriSteem recommends that the user observe and adjust the skim duration
to achieve a balance between reducing mineral buildup and conserving
heated water.
mc_060210_1430-CRUV
WARNING
Electric shock hazard
Contact with energized circuits can
cause severe personal injury or
death as a result of electric shock. To
prevent shock, disconnect electrical
power before performing service or
maintenance procedures on an part of
the humidifi cation system.
When performing maintenance on the
humidifi er:
• If the humidifi er is equipped with
a Vapor-logic controller, use the
keypad to change the control mode
to Standby.
• Place all power disconnects in OFF
position and lock in OFF position.
• Close the fi eld-installed manual
supply water shut-off valve.
mc_031110_0444-CRUV
MAINTENANCE
