Nortec NHDI - Manual (Page 7)

2. All NHSC / NHDI Series blower packs consist
of a steel cabinet containing: blower/motor
powered by voltage directly from the
humidifier, fuse, relay, speed select switch,
stainless steel steam distributor, supply air
grille with adjustable louvers, and a built-in
manual reset safety thermostat to turn off the
humidifier if the blower pack gets overheated.
Control thermostat, mounted on the steam
distributor, starts the fan when steam is
generated. When supply voltage differs from
voltage required to run blower motor, the
blower pack will contain the proper
transformer. All blower packs provide intake
air filters, if required.
3. For installation details about the blower pack,
please refer to the blower pack installation
manual located in the blower pack box, Form
#XX-277.
STEAM DISTRIBUTORS AND SHORT
ABSORPTION MANIFOLD
1. 1. Steam distributors are an optional accessory
used to directly distribute steam to localized
areas (such as computer rooms) which are
served by ducted air. These distributors are
made of stainless steel and are mounted level
to the duct.
2. The SAM-e optional accessory has the same
function, to distribute steam inside a duct. The
only difference is that this system is designed
to reduce the absorption distance of the steam
in the duct by optimizing the steam
distributors.
3. Each cylinder requires its own steam line
and at least one distributor (do not join two
or more cylinders to one larger steam line).
Any cylinder’s steam line may be divided into
multiple branches to feed more than one
distributor. Steam supply line “tees” are
common stainless fittings that are available for
this purpose.
4. Steam distributor locations are typically as
follows: supply air duct, return air duct, air
handling unit. Proper location should
consider: air temperature, relative humidity
before the distributor, air velocity, dimensions
of the location, amount of steam being
introduced into the duct, downstream
obstructions, and surfaces vulnerable to
wetting.
5. The NHSC / NHDI can overcome 6” of W.C.
duct static pressure max. Consult the factory
if you exceed 6” of W.C.
6. For installation details, please refer to the
installation manual located in the Steam
Distributor box, Form #XX-231.
7. For calculating absorption distances, refer to
H.E.L.P. Software or the Steam Distribution
Engineering Manual, Form #XX-232.
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