BLOWER PACK OPERATION
1.
Blower packs are an optional accessory used
to directly distribute steam to localized areas
or in structures that do not have a built-on air
distribution system.
2.
Blower packs are available for remote
mounting or built-on and are field piped to the
humidifier. (Built on Blower Packs are
available with NHTC & NHPC humidifiers
only.)
3.
All blower packs consist of a steel cabinet
containing; blower/motor powered by a 115
Vac single phase supply (208, 277, 440-480
and 550-600 Vac version available), plastic
steam distribution, adjustable air supply.
Control thermostat, mounted on the steam
distributor, starts the fan when steam is
generated.
4.
Refer to Overhead and Frontal Clearance
table for blower pack requirements.
Minimum clearance for the sides of the unit is
4 feet.
5.
Steam distributors on blower packs have hot
surfaces that could result in burns if touched.
If space allows, we recommend mounting at
least 8 feet above the floor (see Figure #2).
6.
Do not use blower packs as ducted blowers.
The air volume from a blower pack is not
sufficient to absorb the steam generated in
the confines of a duct system.
7.
It is recommended that balancing valves be
used on the steam supply lines to multiple
blower packs for equal loading.
REMOTE MOUNTED BLOWER PACKS
- WALL MOUNTING
1.
Steam and condensate line connections are
on the bottom of the blower pack. The
condensate connection is 3/8” and the steam
lines are 7/8” or 1 ½” depending. The knock
out for the appropriate steam connection
must be removed prior to mounting on the
wall. To remove knock out place unit on its
side, on a soft surface, and with a hammer
and a piece of pipe or screwdriver knock out
center of the steam inlet connection.
2.
To wall mount the Remote Blower Pack use
2 #12 x 3” long wood screws, supplied by
others. These screws must be fastened
securely on a 2 x 4 wood stud or equivalent
support. If any spacer material is used
between the bracket and the structural
material such as drywall, increase the
fastener accordingly. In addition, install a
single field supplied fastener in the center
hole in the back of the unit to prevent the unit
from being bumped off the support screws.
- 1 -
Power And
Control
Wiring
Optional
Built-On
Blower Pack
Single
Circuit
Humidifier
Built-In
Supply Air
Grille
Built-In Steam
Distributor
Figure #1
NHTC/NHPC Series Humidifier with Built-on
Blower Packs
Side
Wall
Condensate
Front
Steam
Power To Blower Pack
Control Wiring
From Humidifier
1” (2.5 cm)
Distributor
Figure #2
Blower Pack
