17
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Interconnecting piping requirements
Table 17-1:
Steam loss of interconnecting steam 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), fi berglass insulation, copper tubing, and Schedule 40 pipe.
mc_051310_1215
WARNING
Excessive moisture hazard
DriSteem strongly recommends
installing a duct airfl ow proving switch
and a duct high limit humidistat. These
devices prevent a humidifi er from
making steam when there is low airfl ow
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.
mc_060310_0725
INSTALLATION
CONNECTING TO DISPERSION ASSEMBLY WITH STEAM HOSE
• Support steam hose to prevent sags or low spots and to maintain a
minimum pitch of 2"/ft (15%) back to the humidifi er.
• Use DriSteem steam hose. Other manufacturers of steam hose may use
unacceptable release agents or material mixes that can affect humidifi er
system performance adversely. Using hose from alternative manufacturers
increases the possibility of tank foaming and accelerated aging. Foaming
causes condensate discharge at the dispersion assembly.
• Do not use steam hose in outdoor applications.
• Do not insulate steam hose. Insulation causes accelerated heat aging,
causing the steam hose to become hard and susceptible to failure due to
cracks.
CONNECTING TO DISPERSION ASSEMBLY WITH TUBING
• Support interconnecting piping between the humidifi er steam outlet and the
dispersion system with pipe hangers. Failure to properly support the entire
steam piping weight may cause damage to the humidifi er tank and void the
warranty.
• 90° elbows are not recommended; use two 45° elbows, 1' (0.3 m) apart.
• Insulate tubing to reduce the loss in output caused by condensation.
mc_060310_1145
Dispersion:
