2
VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Vapormist humidifi ers use heat caused by electrical resistance in submerged
heating elements boil fi ll water into humidifi cation steam. Water level is
controlled by means of conductivity probes or a fl oat valve, depending on the
water type.
Supply water guidelines
Supply water quality is an important component
of humidifi er reliability and maintenance.
Examples:
• Corrosive water can decrease the service
life of the humidifier.
• Excessive water hardness can increase the
humidifier maintenance requirements.
To maximize humidifi er service life and
minimize humidifi er maintenance, DriSteem
has established guidelines for supply water
See Table 2-1.
FIGURE 2-1: VAPORMIST HUMIDIFIER
OM-2000-X
Water level control
Steam outlet
Fill valve
Evaporating chamber
Shroud
Heating elements
Vapor-logic controller
keypad/display
Table 2-1:
DriSteem supply water guidelines
Total hardness 0 to 500 ppm
Chlorides*
RO or DI water
Softened water
Tap water
* Damage caused by
chloride corrosion is not
covered by your DriSteem
warranty.
< 5 ppm
< 25 ppm
< 50 ppm
pH
RO, DI, or softened water
Tap water
7 to 8
6.5 to 8.5
Silica < 15 ppm
You may wish to take action to mitigate
potential negative effects to your humidifi er.
Supply water outside of these guidelines may
void your DriSteem warranty. Please contact
your DriSteem Representative or DriSteem
Technical Support if you need advice.
TAP/SOFTENED WATER
Tap/softened water Vapormist humidifi ers (shown above) use conductivity
probes to monitor the water level. See Figure 3-2. Water conductivity must
be at least 30 μS/cm for proper operation. Vapormist humidifi ers for tap or
softened fi ll water will not operate with RO/DI water. For RO/DI water, use
Vapormist with the RO/DI water option.
RO/DI WATER OPTION
Vapormist humidifi ers with the RO/DI water option (deionized water or water
that has been treated using reverse osmosis) control water level with a fl oat
valve and low water cutoff switch. See Figure 3-3. Float valves are compatible
with RO/DI water only.
Humidifi ers with the RO/DI water option are virtually maintenance free and
require little or no downtime.
WATER TYPE CONVERSION
Vapormist humidifi ers can be converted in the fi eld for use with tap/softened
water or RO/DI water. Contact your DriSteem representative or distributor for
parts and instructions.
mc_061610_1640-VM
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