INSTALLATION INSTRUCTIONS (continued)
Elevation
The preferred location for the dispersion tube is higher than the humidifier so that the steam hose has a constant downward slope of at least 2” per foot from the dispersion tube to the humidifier.. If hard pipe is used, the slope can be 1/4” per foot.. With the constant downward slope, any condensation that forms in the steam hose will drain back into the steam canister.. See Figure 3.. If the dispersion tube must be mounted below the humidifier or if the steam hose needs to run up and over an obstruction, a drip tee with drain trap must be installed as shown in Figure 4..
Figure 3 – Dispersion Tube Mounted Above Humidifier
Steam hose or pipe. |
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Insulate pipe with | Dispersion tube | |
1” fiberglass to | ||
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reduce steam loss. | Pitch* | |
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90° long sweep |
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or two 45° elbows | Duct | |
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Figure 4 – Dispersion Tube Mounted Below Humidifier
Drip tee installation for piping over obstruction, or if dispersion tube is lower than humidifier.
90° long sweep |
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or two 45° elbows | Pitch |
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*Pitch steam hose down from dispersion tube to humidifier:
2"/ft (15%) minimum when using steam hose.
1/4"/ft when using hard pipe.
Insulate hard pipe to
reduce steam loss
To
Dispersion
Tube
6" min
8" min
1" air gap
Open drain required,
see note 1.
Obstruction
Drip tee
Drain trap
NOTES:
1.Refer to governing codes for drain pipe size and materials.
2.Support steam hose so there are no sags or low spots.
Distance from Humidifier to Dispersion Tube
The capacity of the humidifier is reduced by the length of the steam hose or pipe due to condensation.. The maximum recommended length of steam hose is 6 feet.. Use hard pipe insulated with 1” fiberglass for lengths greater than 6 feet.. Table 3 provides humidifier capacity with various lengths of steam hose and pipe.. When splicing hard pipe to steam hose, use 1” O..D.. pipe..
Table 3 – Steam Humidifier Capacity in Gallons/Day
Steam Hose | 120 Volts | 208 Volts | 240 Volts | ||||
or Insulated |
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Steam Hose | Insulated Pipe | Steam Hose | Insulated Pipe | Steam Hose | Insulated Pipe | ||
Pipe Length | |||||||
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< 2 ft.. | 11..5 | 11..5 | 20..5 | 20..5 | 23..3 | 23..3 | |
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2 ft.. | 11 | 11 | 20 | 20 | 23 | 23 | |
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4 ft.. | 10 | 11 | 19 | 20 | 22 | 23 | |
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6 ft.. | 9 | 11 | 18 | 20 | 21 | 22 | |
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8 ft.. |
| 10 |
| 19 |
| 22 | |
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10 ft.. |
| 10 |
| 19 |
| 22 | |
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12 ft.. |
| 10 |
| 19 |
| 22 | |
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14 ft.. |
| 9 |
| 18 |
| 21 | |
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16 ft.. |
| 9 |
| 18 |
| 21 | |
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18 ft.. |
| 9 |
| 18 |
| 21 | |
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20 ft.. |
| 9 |
| 18 |
| 20 | |
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6