13
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
Piping:
OM-7591
* Ships with humidifi er
• Dashed lines indicate provided by installer
• The open drain must be at least 12”
(300 mm) below the bottom of the
XT humidifier, to help prevent steam
condensation on the humidifier.
Important:
Thoroughly fl ush supply
water piping to remove pipe residue and
stagnant water before connecting piping to
humidifi er. Pipe residue and stagnant water
in water supply piping can cause foaming,
preventing humidifi er from reaching required
steam capacity.
WARNING
Hot drain pipes
Drain piping surface may be hot.
Touching or contact with hot pipe may
cause severe personal injury.
Drain hose*
3/4" (DN20) I.D.
Open drain
1" (25 mm)
air gap
Pitch 1/8"/ft (1%)
toward drain
Hose clamp*
To drain
SUPPLY WATER PIPING
Use only copper for supply water piping; do not use rubber or plastic. The
standard supply water connection before the fi ll valve is a 1/4" FIP.
Note:
The supply water connection size is 3/8" BSP [DN10] in Europe.
In cases where water hammer may be a possibility, consider installing a shock
arrestor. Water pressure must be 25 to 80 psi (175 to 550 kPa).
DRAIN PIPING
Drain piping must be code-approved, 3/4" (DN 20) ID material rated for
212 °F (100 °C) minimum.
The drain cup has an integral grounding plate and requires a fi eld-installed
1" (25 mm) air gap to a drain funnel to prevent conduction of electricity in the
drain line.
The XT Series humidifi er features user-selectable drain water tempering. When
drain water tempering is selected, the humidifi er tempers drain water by
opening the fi ll valve whenever the drain valve is energized to cool drain water
before it enters the drain. Drain water tempering keeps water entering the
drain line less than 140 °F (60 °C). Manually energizing the drain valve when
the supply water is shut off can allow 212 °F (100 °C) water to enter the drain
line.
Observe the following precautions when selecting and installing drain piping
to ensure personal safety and material integrity:
• When using copper or other metallic drain piping, ground the drain piping
to the earth ground lug in the XT Series humidifi er.
• Chlorinated polyvinyl chloride (CPVC) piping is a non-metallic alternative
for drain piping. It is rated up to 212 °F (100 °C) for intermittent-use, low-
pressure applications.
The connection size for the steam cylinder drain is 1" (DN25) hose. Do not
reduce this connection size. If drainage by gravity is not possible, use a
reservoir pump rated for 212 °F (100 °C) water.
The open drain must be at least 12” (300 mm) below the bottom of the XT
humidifi er, to help prevent steam condensation on the humidifi er. Use the 12”
(300 mm) drain hose provided and position above fi eld-installed open drain.
Alternately, route drain line away from beneath humidifi er to open drain. See
Figure 13-1.
AUTOMATIC DRAIN WATER TEMPERING
XT Series humidifi ers are shipped with drain water tempering set to ON for
North America (OFF for Europe). To activate automatic drain water tempering
see the
Vapor-logic Installation and Operation Manual
.
FIGURE 13-1: DRAIN PIPING DETAIL
Supply water and drain
