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CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Warnings and cautions
WARNING
Disconnect electrical power
Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any
part of the humidifi cation system. Failure to disconnect electrical power could result in fi re, electrical shock, and other
hazardous conditions. These hazardous conditions could cause property damage, personal injury, or death.
Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock
or fi re. Do not remove humidifi er electrical panel cover, heater terminal cover, or subpanel access panels until electrical
power is disconnected.
Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of the
system.
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Electric shock hazard
If the humidifi er starts up responding to a call for humidity during maintenance, severe bodily injury or death from electric
shock could occur. To prevent such start-up, follow the procedure below before performing service or maintenance
procedures on this humidifi er (after the tank has cooled down and drained):
• If the humidifi er is equipped with a Vapor-logic
®
controller, use the keypad to change the control mode to Standby.
• Shut off all electrical power to humidifi er using fi eld-installed fused disconnect, and lock all power disconnect switches in
OFF position.
• Close fi eld-installed manual water supply shut-off valve.
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CAUTION
Hot discharge water
Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.
To prevent such damage from humidifi ers without water tempering, allow the tank to cool before draining.
Humidifi ers equipped with a water tempering device such as a DriSteem Drane-kooler need fresh make-up water in order to
function properly. Make sure the water supply to the water tempering device remains open during draining.
Excessive supply water pressure
Supply water pressure greater than 80 psi (550 kPa) can cause the humidifi er to overfl ow.
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