CARNES HBGH Installation, Operation And Maintenance Manual page 6

Outer diameter of drain pipe is 1-1/4". Air gap fitting must be added.
STEAM DISTRIBUTOR PIPE LOCATION
Each steam cylinder requires a separate distributor
pipe, steam hose and condensate return line. A cylinder
may supply more than one distributor pipe by using an
accessory "T" fitting but the output cannot be controlled
separately. In a typical installation the humidifier is located
below the duct as shown in Figure A. The distance between
the humidifier cabinet and the steam distributor pipe should
be the minimum distance possible. Refer to Table 3 for
maximum length that may be installed, based on duct static
pressure. Under less than perfect conditions, (installation
issues, routing problems for steam and condensate return
hose and extreme steam hose lengths) it is possible to lose
significant amounts of lbs. per hour capacity.
MAXIMUM STEAM HOSE LENGTH (Table 3)
Duct Static
Pressure "wg"
Maximum Steam
Hose Length (Ft.)
AFFECT ON CAPACITY DETERMINED BY STEAM HOSE
LENGTH (Table 3-A)
Distance
10 Ft.
20 Ft.
25 Ft.
40 Ft.
Photo C
0 1 2 3
40 35 30 25
Loss
1.0 lb./hr.
2.0 lb./hr.
2.5 lb./hr.
4.0 lb./hr.
Figure A
TYPICAL HOSE LOCATION
FOR LENGTHS UP TO
12 FEET
Figure A-1
The maximum length of steam hose that may be installed
as shown in Figure A & A-1 is 12 feet. For a steam hose
4 5 length over 12 feet refer to Figure B. A drain "T", must be
used to remove condensation that occurs in steam hose
lengths over 12 feet. It is preferable to have the steam hose
15 10
rise vertically from the cabinet and then slope downward to
the distributor pipe as shown. If sufficient headroom is not
available it is possible to install with an upward slope but
the rise should be 2" in 12" to allow for proper condensate
drainage and steam flow. Carnes electrode steam humidi-
fiers are non-pressurized, maximum of 1/2 psi. It is critical
to provide proper routing of flexible hose and hard tubing to
maximize efficiency and effectiveness. See Figure D. Every
application is different. Hose lengths for small capacity units
will be considerably shorter then larger units. All variable
must be taken into consideration.
6
Mounting plate
must be plumb.
Condensate hoses
must pitch down con-
tinuously to humidifier
— NO pockets, sags or
horizontal runs.
If hose is difficult to
support within this
length, straight
copper tube should
be used and
insulation applied.