Specifications

DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual • Page 17
Dispersion:
Interconnecting piping requirements
Table 17-1:
Steam loss of interconnecting vapor hose, tubing and pipe
Description
Nominal hose, tubing or pipe size
Steam loss
Insulation thickness
Noninsulated Insulated
inches DN lbs/hr/ft kg/h/m lbs/hr/ft kg/h/m inches mm
Hose
1½ 40 0.15 0.22 N/A N/A N/A N/A
2 50 0.20 0.30 N/A N/A N/A N/A
Tubing
1½ 40 0.11 0.164 0.02 0.03 2 50
2 50 0.14 0.21 0.025 0.037 2 50
Pipe
1½ 40 0.22 0.33 0.02 0.03 2 50
2 50 0.25 0.38 0.025 0.037 2 50
Note: These data are based on an ambient air temperature of 80 °F (27 °C), fiberglass insulation, copper tubing, and Schedule 40 pipe.
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WARNING
Excessive moisture hazard
DRI-STEEM strongly recommends installing
a duct airflow proving switch and a duct
high limit humidistat. These devices
prevent a humidifier from making steam
when there is low airflow in the duct or
when the RH level in the duct is too high.
Failure to install these devices can result
in excessive moisture in the duct, which
can cause bacteria and mold growth or
dripping through the duct.
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Connecting to humidifier with tubing or pipe
• See Figures 18-1 and 19-1 for interconnecting tubing and pipe
pitch requirements for single tube applications. See Table 21-1
for interconnecting tubing and pipe pitch requirements for
Rapid-sorb applications.
• Support interconnecting piping between the humidifier steam
outlet and the dispersion system with pipe hangers. Failure
to properly support the entire steam piping weight may cause
damage to the humidifier tank and void the warranty.
• Steam supply adapters are available from DRI-STEEM. These
adapters convert a tubing outlet on the humidifier to threaded
pipe, allowing a pipe connection.
• 90° elbows are not recommended; use two 45° elbows, 1' (0.3 m)
apart.
• Thin wall tubing heats up faster and causes less start-up loss
than heavy wall pipe.
• Insulating hard pipe reduces the loss in output caused by
condensation.
• When using hard pipe, take care to remove ALL traces of
lubricants used to thread the pipe. This will minimize the
possibility of tank foaming. Denatured alcohol or mineral spirits
work best for removing lubricant.
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