Specifications

Page 8 • DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual
Piping:
Tap/softened water
Installation
Figure 8-1:
CRUV (tap/softened water) field piping overview
Notes:
• Locate air gap only in spaces with adequate temperature and air movement to absorb flash steam; otherwise, condensation may form on nearby surfaces.
Refer to governing codes for drain pipe size and maximum discharge water temperature.
• Offset humidifier from floor drain to prevent flash steam from rising into the humidifier.
• Dashed lines indicate provided by installer.
• The water supply inlet is more than 1" (25 mm) above the skim/overflow port, eliminating the possibility of backflow or siphoning from the tank. No
additional backflow prevention is required; however, governing codes prevail.
• Damage caused by chloride corrosion is not covered by your DRI-STEEM warranty.
Install plumb
DC-1133
Steam vapor hose
Shock arrester recommended
to reduce water hammer
Skim/overflow port
Drain
If run is over 10' (3 m), increase
pipe to 1¼" (DN32)
1" (25 mm) air gap
Pitch 1/8"/ft (1%)
6" (152 mm)
recommended
Open drain required. See first note below.
Tank surfaces will reach
212 °F (100 °C) when
operating. Provide outer
protection from direct
contact, but allow for
natural ventilation.
Water inlet strainer
Water supply inlet
12" (305 mm)
minimum
¾" (DN20) union for skim, drain, and overflow
connection; plumbing rated for 212 °F (100 °C)
Tank support
Water supply line:
• ¼" NPT (DN8) connection size
• 25 to 80 psi (175 to 550 kPa) required water
pressure
• First 3’ (1 m) of supply line must be rated for
212 ºF (100 ºC)
If water piping to humidifier is nonmetallic, we
recommend a 2” (50 mm) metallic water seal or loop
in the supply line to isolate steam during maintenance.
mc_071210_1603