57
VAPORSTREAM INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table 57-1:
SDU-E minimum nonwetting distances
kW
Maximum steam
capacity
40% RH @ 70 °F (21 °C)
50% RH @ 70 °F (21 °C)
60% RH @ 70 °F (21 °C)
Rise
Spread
Throw
Rise
Spread
Throw
Rise
Spread
Throw
lbs/hr
kg/h
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
2
6
2.7
1.0
0.3
1.0
0.3
5.0
1.5
1.5
0.5
1.5
0.5
6.5
2.0
2.5
0.8
2.5
0.8
7.5
2.3
4
12
5.4
1.0
0.3
1.0
0.3
5.0
1.5
1.5
0.5
1.5
0.5
6.5
2.0
2.5
0.8
2.5
0.8
7.5
2.3
6
18
8.2
1.0
0.3
1.0
0.3
5.0
1.5
1.5
0.5
1.5
0.5
6.5
2.0
2.5
0.8
2.5
0.8
7.5
2.3
8
24
10.9
1.0
0.3
1.0
0.3
5.5
1.7
1.5
0.5
1.5
0.5
6.5
2.0
2.5
0.8
2.5
0.8
7.5
2.3
10
30
13.6
1.5
0.5
1.5
0.5
6.0
1.8
2.0
0.6
2.0
0.6
7.0
2.1
3.0
1.0
3.0
1.0
8.0
2.5
12
36
16.3
1.5
0.5
1.5
0.5
6.0
1.8
2.0
0.6
2.0
0.6
7.0
2.1
3.0
1.0
3.0
1.0
8.0
2.5
14
42
19.1
2.0
0.6
2.0
0.6
7.0
2.1
2.0
0.6
2.0
0.6
7.0
2.1
3.0
1.0
3.0
1.0
9.0
2.7
16
48
21.8
2.0
0.6
2.0
0.6
7.0
2.1
2.0
0.6
2.0
0.6
7.0
2.1
3.0
1.0
3.0
1.0
9.0
2.7
21
63
28.6
2.0
0.6
2.0
0.6
7.5
2.3
2.5
0.8
2.5
0.8
10.0
3.0
3.0
1.0
3.0
1.0
12.0
3.7
25
75
34.0
2.0
0.6
2.0
0.6
8.0
2.5
2.5
0.8
2.5
0.8
10.5
3.2
3.5
1.1
3.5
1.1
12.5
3.8
30
90
40.9
2.0
0.6
2.0
0.6
8.0
2.5
2.5
0.8
2.5
0.8
10.5
3.2
3.5
1.1
3.5
1.1
12.5
3.8
34
102
46.3
2.0
0.6
2.0
0.6
8.0
2.5
2.5
0.8
2.5
0.8
10.5
3.2
3.5
1.1
3.5
1.1
12.5
3.8
Notes:
• Surfaces or objects directly in the path of vapor discharge may cause condensation and dripping.
• To avoid steam impingement on surrounding areas, observe the minimum nonwetting dimensions in this table.
• Rise: The minimum nonwetting height above the steam outlet of the SDU-E.
• Spread: The minimum nonwetting width from the steam outlet of the SDU-E.
• Throw: The minimum nonwetting horizontal distance from the steam outlet of the SDU-E.
mc_042710_1300
SDU-E
SDU-E RISE, SPREAD, AND THROW
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 57-1 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 57-1.
The SDU-E contains a blower (120 V, single-phase, 60 Hz) and an airfl ow proving switch (fi eld-wired to the humidifi er
electrical panel). A wiring diagram of the SDU-E is included with the unit.
On a call for humidity, the humidifi er begins producing steam, and the start relay energizes the SDU-E blower. When
the call for humidity is satisfi ed, the Vapor-logic controller keeps the blower running to disperse residual moisture using a
time delay.
mc_042710_1255
INSTALLATION
Dispersion:
Steam outlet
Throw
Spread
Air
intake
grille
DC-1027
Rise
mc_042710_1435
FIGURE 57-1: SDU-E RISE, SPREAD, AND
THROW
