Specifications

8
VAPORMIST
®
PIPING
VAPORMIST DI (deionized/reverse osmosis water) field piping overview
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 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.
¼" NPT (DN8) connection to water
supply line; water pressure must be
between 25 psi and 80 psi (175 kPa
and 550 kPa); water chloride content
must be less than 3 ppm; first
3' (1 m) of supply line must be
rated for 212 °F (100 °C)
Water supply line
Spill funnel.
Plumb to
floor drain
1" (25 mm) air gap
¾" NPT (DN20) tank drain 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
Install plumb
DC-1139
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
Frame drain
Strainer,
by installer
If water piping to humidifier is non-metallic,
we recommend a 2" (50 mm) water seal in
the supply line to isolate steam during
DI/RO water system maintenance
Unions by
installer
Steam vapor hose
(maximum run 10'
[3 m]). May also use
pipe or tubing
12"
(300 mm)
2" (50 mm)
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)
VM99-C-0302.pdf 8 11/19/2009 9:51:31 AM