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2008-04-28
1. OVERVIEW
A. BLOWER PACK
(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 factory installed (“built-on”) or for remote mounting.
Remote blower packs 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; 3 fams powered by a 115 Vac
single phase supply (208, 277, 440-480 and 550-600 Vac version available), plastic
steam distribution, and adjustable air supply.
(4) Control thermostat, mounted on the steam distributor, starts the fans when steam is
generated.
(5) Refer to Overhead and Frontal Clearance table for blower pack requirements.
Minimum clearance for the sides of the unit is 4 feet.
(6) Steam distributors on blower packs have hot surfaces that could result in burns if
touched. If space allows, it is recommended to mount the blower pack at least 8 feet
above the floor.
(7) 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.
(8) It is recommended that balancing valves be used on the steam supply lines to
multiple blower packs for equal loading.
Figure 1. NHTC / NHPC Series Humidifier
with Built-On Blower Packs
Figure 2. Blower Pack