Nortec NHPC, NHTC manual 10-20, C. EXECUTION 1Examination, Page 70

2The factory assembled blower pack includes an integral steam distributor, three tubeaxial (box) fans, fusing, wall mounting bracket, and air proving safety circuitry.

3Primary and control voltage terminal blocks facilitate field connections between the humidifier.

4Blower pack may be remote mount or built-on the humidifier.

(c)Short Absorption Manifold – NORTEC Model SAM-e

1Short Absorption Manifold designed for atmospheric steam humidifiers or pressurized steam from a boiler, to directly inject the steam into ducted air for humidification.

aAbsorption distance characteristic shall prevent water accumulation on any induct surfaces beyond ___in. (___mm) downstream of the steam dispersion panel.

bSteam dispersion panel consisting of a (one) horizontal stainless steel header supplying steam to a bank of closely spaced 3" (7.6 cm) or

6" (15.2 cm) or 9" (22.9 cm) or 12" (30.5 cm) vertical tubes, as necessary to meet absorption distance requirements, and to reduce condensation losses.

cSingle horizontal stainless steel header to provide steam to vertical distributor tubes and to reduce condensation losses. Dual header systems creating unnecessary condensation, or systems needing to be installed on a partition or requiring blank off plates are not acceptable.

dHeader design is primarily round tube to minimize pressure drop. Square headers are not acceptable.

eSteam inlet and condensate return located on the same side and at the bottom of the header to allow single point entry and floor mounting.

fHeaders and tubes are 304 stainless steel construction.

gVertical stainless steel distribution tubes to promote condensate evacuation. Horizontal distributor tubes are not accepted.

hDistribution tubes shall include threaded standoffs for trouble free attachment to factory supplied support bracket.

iStainless steel nozzle inserts ensure condensate free steam is discharged from the center of the distribution tubes. Systems without nozzle inserts, or other than stainless steel, are not acceptable.

jStainless steel nozzle inserts shall have metered orifices, sized to provide even distribution of the discharged steam, spaced for optimum steam absorption.

kNozzles of dissimilar metals are likely to dislodge due to inconsistent rates of expansion and therefore not accepted.

lAdjustable mounting frame available for quick and easy installation.

C. EXECUTION

(1)Examination

(a)Examine ducts, air handling units, and conditions for compliance with requirements for installation tolerances and other conditions affecting performance.

10-20

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