Specifications
5
INSTALLATION
VAPORMIST
®
Mounting Tube
with Condensate Drain Line
• Mount dispersion tube level.
• For best vapor absorption, orient
dispersion tube so that tubelets are
directed against the air flow.
Connecting Dispersion Tube to
Humidifier
• Connection can be made with vapor
hose or rigid tubing
• Vapor piping should have a
minimum I.D. of 1½".
• A minimum pitch of 2" per foot
back to the humidifier should be
maintained.
• 90° elbows are not recommended;
use two 45° elbows 12" apart
instead.
• Thin-walled tubing will heat up faster
than heavy-walled pipe, causing less
steam loss at start-up.
• Insulating rigid tubing will reduce
the steam output loss caused by
condensation.
• When mounting the humidifier
above the level of dispersion tube,
see figure 4-2 on page 4.
Failing to follow these recommendations
may result in excessive back pressures
being imposed on the humidifier. This
may lead to dispersion tube(s) spitting,
lost water seals, or leaking gaskets.
When distances between humidifier and
the dispersion tube(s) exceed 20 feet,
consult factory for recommendations.
Insertion Length
Pre-molded High
Temperature Resin Tubelets
3/8" - 16
Support Nut Welded
To Tube
½" O.D. Type 304
Stainless Steel
Tubing (condensate
drain)
OM-351-1
Movable Escutcheon
Plate (Plate can be mounted
within limits of 2.5".)
¼" NPT***
3.25"
3.25"
3.25"
2.5"
Figure 5-1: Single Tube
½" O.D. SST Tubing *
(Condensate Drain)
Dispersion Tube
Duct
Disperion Tube
6" Minimum
Water Seal (5" approx.)
1" Air Gap
Open Drain
Condensate Drain Tube by
Others (¾" minimum)**
Air Flow
OM-224
1-½" Dia. Vapor Hose
or Rigid Tubing
¼" NPT
* ½" diameter condensate tubing is not needed nor provided when steam flow is
34 lbs per hour or less per dispersion tube.
**Note: Condensate drain tubing material must be suitable for 212°F (100°C)
water.
Minimum condensate return line sizing:
• One or two tubes - 1/2" I.D.
• Three or more tubes - 3/4" I.D.
3.25"
Figure 5-2: Multiple Tube with Condensate Wasted to Floor Drain
VM-IOM-1996 Scan.pdf 5 11/19/2009 9:57:23 AM