Nortec EL SERIES, Installation, Operation And Maintenance Manual, Page: 24 / 72

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Installation
2584597_B_EN_1705 Nortec EL/RS Outdoor
5.3 Site Requirements
As mentioned previously, the Nortec EL/RS Outdoor humidifier can be mounted on a suitably reinforced
vertical surface on the air handling unit (AHU), a suitably sized curb on the rooftop, or a suitable verti-
cal surface on an exterior wall. Humidifiers typically operate in the cold winter months. As a result they
should be located where services to the unit are not in any danger of freezing, and where it is safe and
convenient for maintenance personnel to service the unit. In addition, the length of the steam line should
be kept as short as possible to minimize heat losses. In all cases consult national and local installation
codes. Nortec is not responsible for installation code violations.
IMPORTANT! The warranty does not cover damage to the humidifier caused by neglect or due
to freezing.
Refer to
"Installation Overview" on page 14
for the different ways the Nortec EL/RS Outdoor humidifier can
be installed.
In preparation for installation of the Nortec EL/RS Outdoor humidifier, make sure that the following site
requirements are satisfied regardless of the mounting arrangement. Report any discrepancies to the
site engineer.
Mounting
Do not install the Nortec EL/RS Outdoor humidifier in an outdoor environment where the unit is
exposed to severe weather, or where the temperature drops below -40 °F (-40 °C). Refer to
Table A1
on page i
for weather data.
Do not mount the unit in locations where the wind speed exceeds 100 mph (160 km/h). When wind
speed exceeds this limit, external bracing (supplied by others) will be required. To determine the
prevailing wind speeds for the selected location, refer to http://windspeed.atcouncil.org/ .
IMPORTANT! The warranty does not cover damage to the humidifier or property caused by
winds in excess of 100 mph (160 km/h).
Allow adequate clearances around the humidifier for ease of maintenance – refer to Table 4 on page 23
for minimum clearances. Observe all local and national installation codes. Nortec is not responsible
for any installation code violations.
Make sure that the structure/surface onto which the humidifier is mounted is stable and suitably rein-
forced (strength equivalent to 2×4 stud or 1-5/8 in × 1-5/8 in ×12 gauge Unistrut channel) to support
the full operating weight of the humidifier – refer to Table 9 on page 57 for weights.
Steam and Condensate Lines:
When choosing the location of the humidifier, install it as close as possible to the steam distributor
to minimize heat loss through the steam line. The steam line can be connected directly to an AHU
or routed through a pipe chase into the building.
Make sure that the selected location permits proper routing of the steam and condensate lines – refer
to the Nortec EL/RS manuals for details. The number of bends and the length of the line must be
kept to a minimum so that the total system backpressure does not exceed 5.5 in H2O (1.37 kPa).
The steam line should be routed in such a way that it maintains a constant minimum upslope of 10°
or downslope of 2°.
Provision must be made for condensate removal, and suitable care must be taken to ensure lines
and trap do not freeze.