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8
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Selecting a location
HUMIDIFIER
When selecting a location for the humidifi er, consider the following:
• Proximity to the duct
Install the humidifi er near the air duct system where the dispersion assembly
will be located. The maximum recommended length for steam hose
connecting a single humidifi er to a dispersion assembly is 10' (3 m). The
maximum recommended developed length for tubing connecting a single
humidifi er to a dispersion assembly is 20' (6 m).
For more information about installing dispersion assemblies, see
“Dispersion” beginning on Page 20.
• Elevation of the installed dispersion assembly
The recommended installation location for the dispersion assembly is at an
elevation higher than the humidifi er. However, if the dispersion assembly
must be installed at an elevation lower than the humidifi er, install a drip tee
and drain. See “Drip tee installation” on Page 29.
Before installing a dispersion assembly or interconnecting piping, review all
pitch requirements in the “Dispersion” section of this manual.
• Temperature and relative humidity (RH):
Install
humidifi er only in locations that meet the following temperature and
RH requirements:
- Maximum ambient temperature: 104 °F (40 °C)
- Minimum ambient temperature: 41 °F (5 °C)
- Maximum ambient humidity: 80% RH (non-condensing)
• Required clearances (see Figure 8-1)
• Electrical connections
Electrical power supply connections are at the lower or upper right rear
corner of the unit. See “Humidifi er wiring” on Pages 17 and 18.
• Supply water and drain piping connections
Water supply piping and drain connections are at the bottom of the
cabinet. See “Piping” on Page 13.
• Exterior wall insulation
Install the humidifi er on an exterior wall only if the wall is properly
insulated.
DISPERSION CONTROL DEVICES
See page 20 for recommended installation locations for the dispersion
assembly and associated control devices.
INSTALLATION
Staging multiple humidifiers
Up to four Model XTP humidifi ers can be
staged to operate in sequence. In a sequenced
application, one control input signal is divided
into user-selectable control input signals for
the connected humidifi ers. See the
Vapor-logic
In stal la tion and Op er a tion Man u al
for
instructions on staging multiple humidifi ers.
16"
(400 mm)
15" (380 mm)
3" (76 mm)
between
units
3"
(76 mm)
36" (914 mm)
front clearance
OM-7664
FIGURE 8-1: XT SERIES HUMIDIFIER
RECOMMENDED MINIMUM CLEARANCES