40
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
XT steam blowers
Dispersion:
Table 40-1:
XT steam blower minimum non-wetting distances
Model
Nominal
steam
capacity
30% RH @ 70 ºF (21 ºC)
40% RH @ 70 ºF (21 ºC)
50% RH @ 70 ºF (21 ºC)
60% RH @ 70 ºF (21 ºC)
Rise
Spread
Throw
Rise
Spread
Throw
Rise
Spread
Throw
Rise
Spread
Throw
XTP
lbs/hr kg/h
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
ft
m
002
5
2
0.7 0.2 0.9 0.3 1.9 0.6 0.8 0.2 1.2 0.4 2.1 0.6 1.1 0.3 1.5 0.5 2.5 0.8 1.5 0.5 1.5 0.5 3.2 1.0
003
10
5
1.4 0.4 1.9 0.6 3.8 1.2 1.7 0.5 2.4 0.7 4.3 1.3 2.3 0.7 3.0 0.9 5.0 1.5 3.0 0.9 3.0 0.9 6.5 2.0
006
20
8
2.5 0.8 2.8 0.9 6.5 2.0 3.0 0.9 3.3 1.0 7.4 2.3 3.8 1.2 4.0 1.2 8.5 2.6 4.0 1.2 4.0 1.2 10.0 3.0
010
30
14
3.1 0.9 3.0 0.9 7.5 2.3 3.6 1.1 3.4 1.0 8.7 2.7 4.3 1.3 4.0 1.2 9.5 2.9 4.2 1.3 3.5 1.1 11.0 3.4
017
50
22
3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3
025*
75
34
3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3
033*
100
45
3.3 1.0 3.1 0.9 9.6 2.9 3.8 1.2 3.5 1.1 10.7 3.3 4.4 1.3 4.0 1.2 12.0 3.7 4.8 1.5 4.7 1.4 14.0 4.3
Rise:
Minimum non-wetting height above the steam outlet of the XT steam blower
Spread: Minimum non-wetting width from the steam outlet of the XT steam blower
Throw:
Minimum non-wetting horizontal distance from the steam outlet of the XT steam blower
* These models use two XT steam blowers.
Fuses provided with the steam blowers must fi rst be
installed in the associated XT series humidifi ers.
On a call for humidity, the controller closes the contactors
to energize the humidifi er electrodes and the XT steam
blower. When the call for humidity is satisfi ed, the
controller opens the humidifi er contactor, which stops the
steam blower.
As steam is discharged from the XT steam blower, it
quickly cools and turns to a visible fog that is lighter than
air. As this fog is carried away from the XT steam blower
by the airstream, it tends to rise toward the ceiling. If the
fog contacts solid surfaces (columns, beams, ceiling, pipes, etc.) before it disappears, it can condense and drip. The
greater the space relative humidity, the further the fog will rise, spread, and throw.
Table 40-1 lists the maximum rise, spread, and throw non-wetting distances for XT Series humidifi ers with XT steam
blowers. 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 the table.
XT steam blowers are fi eld wired to the XT Series humidifi er blower terminals. A wiring diagram is included with the XT
steam blower.
Steam outlet
Rise
Spread
Throw
OM-7686
Air intake
XT STEAM BLOWER RISE, SPREAD, AND THROW
