TM
Installation & Location
Important: Remove all shipping brackets and materials
before operating the humidi¿ er. Humidi¿ er À ue gases
must be vented to the outside atmosphere. Power
supply disconnect switch must be in the oႇ position while
making wiring connections to prevent electrical shock
and equipment damage. All units must be wired in strict
accordance with wiring diagram furnished with this unit.
Turn oႇ all gas while installing the supply gas piping and
¿ eld installed manual gas shut-oႇ valve for the humidi¿ er.
Location
The location selected must provide for electrical service,
cold or hot water supply, and sanitary drain.
When selecting a location, try to keep the humidi¿ er within
10 feet (305 cm) of the duct to avoid unnecessary heat
losses and condensation within the steam supply line.
Visible “fog” will saturate and condense when it contacts
objects such as turning vanes, ¿ lters, fans, elbows or take-
oႇ s. The warmer the air, the more easily it will dissipate
the visible steam. The most active and warmest portion of
the duct will provide better mixing of the steam and air. The
injection tube should be mounted a minimum of 2 feet (61
cm) downstream from an elbow or other turbulent air À ow
area.
Avoid mounting single style injection tube(s) closer than
8-10 feet (244-305 cm) upstream of objects that could
become saturated and condense the steam (reference
the paragraph above). If the duct layout does not provide
a straight unobstructed run of 8-10 feet (244-305 cm), a
multiple injection tube system should be considered to
reduce the visible steam travel distance.
For Fast-Pac and Insty-Pac multiple tube assemblies
please consult factory for job speci¿ c non-wetting
distances.
Reference Fast-Pac or Insty-Pac O&Ms for full installation
details.
CAUTION: Do not humidify upstream of ¿ lters. Consult
factory.
CAUTION: Smoke detectors should not be located
downstream of injection tube assemblies.
Location of Controls
It is important to avoid mounting any controls within the
visible steam. The controls should be mounted a minimum
of 8-10 feet (244-305 cm) downstream from the humidi¿ er
injection tube. Due to the temperature rise that exists
within the visible steam dissipation area, thermostats
should not be mounted near the injection tube.
High-limit humidistats should be installed before any duct
obstruction to make sure the humidi¿ er is interrupted
before saturation can occur on the object. The high-limit
should be mounted a minimum of 8-10 feet (244-305 cm)
downstream from the injection tube. Installing the high-limit
closer than 8 feet (244 cm) from the humidi¿ er may cause
erratic control.
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