WARNING
Indicates a hazardous situation that could result in death or
serious injury if instructions are not followed.
CAUTION
Indicates a hazardous situation that could result in damage to
or destruction of property if instructions are not followed.
mc_051508_1145
Vapormist
®
,
Humidi-tech
®
, and CRUV
®
Electric Humidifiers,
Standard Water
Service Kit Manual
Parts in this service kit are for VM99, HT99, and CRUV99 humidifiers (August 1999 to present). Parts are listed on page 2.
WARNING
Read all warnings and instructions
This page provides important safety instructions; it is intended to supplement — not replace — the humidifier's Installation, Operation, and
Maintenance Manual (IOM). Read the IOM that was provided with the humidifier before performing service or maintenance procedures
on any part of the system. Failure to follow all warnings and instructions could produce the hazardous situations described here and in the
IOM, resulting in property damage, personal injury, or death.
If the IOM is missing, go to http://www.dristeem.com/ds_lit.jsp to download a replacement. mc_071608_0910
Hot surfaces and hot water
Steam humidification systems have extremely hot surfaces, and water in tanks, electrode cylinders, steam pipes, and dispersion assemblies
can be as hot as 212 °F (100 °C). To avoid severe burns, allow the entire humidification system to cool.
Follow the cool-down procedure in the humidifier's IOM before performing service or maintenance procedures on any part of the system.
mc_071608_0911
Shut down the energy source
Before performing service or maintenance procedures on any part of the humidification system, verify that all energy sources are off.
Energy sources can be electricity, gas, steam, or hot liquid. Failure to shut down the energy source could result in carbon monoxide
poisoning, fire, explosion, 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 fire. Do not
remove the shroud/cover, electrical panel cover/door, access panels, or heater terminal cover until electrical power is disconnected.
Follow the shutdown procedure in the humidifier's IOM before performing service or maintenance procedures on any part of the system.
mc_050808_1551
Electrical shock hazard
If the humidifier starts up at a call for humidity during maintenance, severe bodily injury or death from electrical shock could occur. To
prevent such start-up, follow the procedure below before performing service or maintenance procedures on this humidifier (after the tank
has cooled down and drained):
1. Use the Vapor-logic
®
3 or Vapor-logic4 keypad to change the control mode to Standby.
2. Shut off all electrical power to the humidifier using the field-installed fused disconnect, and lock all power disconnect switches in the
OFF position.
3. Close the field-installed manual water supply and gas shut-off valves. mc_050808_1530
CAUTION
Damage from hot discharge water
Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.
If the humidifier is equipped with a water tempering device such as a DRI-STEEM Drane-kooler
™
, it needs fresh make-up water in order to function
properly. Make sure the water supply to the Drane-kooler remains open during draining.
If the humidifier is not equipped with a water tempering device, allow the tank to cool before opening the drain valve. mc_111308_1345
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