DriSteem VAPORMIST Specifications download pdf (Page 30)

VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

INSTALLATION

As steam is discharged from the SDU-E, it quickly cools and turns to a visible

fog that is lighter than air. As this fog is carried away from the SDU-E by the

airstream, it tends to rise toward the ceiling. If this fog contacts solid surfaces

(columns, beams, ceiling, pipes, etc.) before it disappears, it could collect and

drip as water. The greater the space relative humidity, the more the fog will

rise, throw and spread.

Table 27-1 lists the minimum rise, throw and spread non-wetting distances

for SDU-E at 40%, 50% and 60% RH in the space. Surfaces cooler than

ambient temperature, or objects located within this minimum dimension, can

cause condensation and dripping. To avoid steam impingement on surrounding

areas, observe the minimum non-wetting distances in Table 27-1.

The SDU-E contains a blower (120 V, single-phase, 60 Hz) and an airﬂow

proving switch (ﬁeld-wired to the humidiﬁer electrical panel). A wiring diagram

of the SDU-E is included with the unit.

On a call for humidity, the humidiﬁer begins producing steam, and the start

relay energizes the SDU-E blower. When the call for humidity is satisﬁed, the

Vapor-logic controller keeps the blower running to disperse residual moisture

using a time delay.

mc_042710_1255

Steam outlet

Throw

Spread

Air intake grille

DC-1027

Rise

mc_042710_1435

SDU-E RISE, SPREAD, AND THROW

Dispersion: SDU-I and SDU-E

FIGURE 26-1: SDU-E RISE, SPREAD, AND THROW

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 55 56

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DriSteem VAPORMIST Specifications Page 30