Specifications

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Installation
Table 23-1:
SDU-E minimum nonwetting distances
kW
Maximum steam
capacity (kg/h)
40% RH @ 21 °C 50% RH @ 21 °C 60% RH @ 21 °C
Rise (m) Spread (m) Throw (m) Rise (m) Spread (m) Throw (m) Rise (m) Spread (m) Throw (m)
2 2.7 0.3 0.3 1.5 0.5 0.5 2.0 0.8 0.8 2.3
4 5.4 0.3 0.3 1.5 0.5 0.5 2.0 0.8 0.8 2.3
6 8.2 0.3 0.3 1.5 0.5 0.5 2.0 0.8 0.8 2.3
8 10.9 0.3 0.3 1.7 0.5 0.5 2.0 0.8 0.8 2.3
10 13.6 0.5 0.5 1.8 0.6 0.6 2.1 1.0 1.0 2.5
12 16.3 0.5 0.5 1.8 0.6 0.6 2.1 1.0 1.0 2.5
14 19.1 0.6 0.6 2.1 0.6 0.6 2.1 1.0 1.0 2.7
16 21.8 0.6 0.6 2.1 0.6 0.6 2.1 1.0 1.0 2.7
21 28.6 0.6 0.6 2.3 0.8 0.8 3.0 1.0 1.0 3.7
25 34.0 0.6 0.6 2.5 0.8 0.8 3.2 1.1 1.1 3.8
30 40.9 0.6 0.6 2.5 0.8 0.8
3.2 1.1 1.1 3.8
34 46.3 0.6 0.6 2.5 0.8 0.8 3.2 1.1 1.1 3.8
Notes:
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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 23-1 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 23-1.
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-logic4 controller keeps the blower
running to disperse residual moisture using a time delay.
Figure 23-1:
SDU-E rise, spread, and throw
Steam outlet
Throw
Spread
Air intake
grille
DC-1027
Rise
SDU-E rise, spread, and throw