Specifications

7
VAPORMIST
®
PIPING
Notes:
• Offset humidifier from spill funnel or floor drain to prevent flash steam from rising into the cabinet.
• 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, local
codes prevail.
• Install a union in the water supply line as shown to allow tank removal.
VAPORMIST (standard water) field piping overview
Shock arrester
recommended to
reduce water hammer
¼" NPT (DN8) connection to water
supply line; water pressure must be
between 25 psi and 80 psi (175 kPa
and 550 kPa); water conductivity
minimum 2 grains/gallon (100 µS/cm)
Water supply line
Spill funnel.
Plumb to
floor drain
1" (25 mm) air gap
¾" NPT (DN20) tank
drain, skimmer and
P-trap piping, rated
for 212 °F (100 °C).
If piping run is over
10' (3 m) increase
pipe to 1¼" (DN32)
after P-trap.
Open floor drain.
Refer to local codes
for drain pipe size
and maximum
temperature
requirements.
Cover
Electrical conduit
knockouts provided
top and bottom:
• Combination, for
½" and ¾"conduit
connectors (knock-
out diameters
22.3 mm and
28.6 mm)
• Combination, for
¾" and 1" conduit
connectors (knock-
out diameters
28.6 mm and
34.9 mm)
Install plumb
Steam vapor hose
(maximum run 10' [3 m]).
May also use pipe or
tubing.
DC-1136
¾" NPT (DN20)
frame drain and
P-trap piping, rated
for 212 °F (100 °C)
Two keyholes for wall
mounting, 16" (406 mm)
on center
12"
(300 mm)
2" (50 mm)
Frame drain
Unions by installer
VM99-C-0302.pdf 7 11/19/2009 9:51:30 AM