Specifications

6
PIPING
Figure 6-1: Drain adjacent to wall
Water make up piping may be of any code-
approved material (copper, steel, or plastic). The
final connection size is DN6 (1/4"). In cases where
water hammer may be a possibility, a shock arrestor
should be considered water pressure must be
between 170 kPa and 582 kPa.
Drain piping may be of any code-approved material
(copper, steel, or plastic rated for 100 °C minimum).
If drainage by gravity is not possible, a small lift
pump should be used (DRI-STEEM Part
No. 400280).
The final connection size is DN20 (3/4") for drain
fitting and frame drain. This connection size should
not be reduced. (See Figures below for proper drain
piping configurations.) The evaporator drain should
be piped and discharge into a floor drain. Combin-
ing the two drain pipes into a single drain line may
result in the backflow of drain water into the humidi-
fier cabinet, causing the unit to
malfunction.
Note: Locate the cabinet drain line exit away from
the humidifier drain line exit, if possible. This will
prevent water vapor from migrating up the cabinet
drain line. Extending the cabinet drain line may also
be effective.
DN20 (¾") frame
drain (male)
Humidifier
cabinet
OM-1005-1
Figure 6-2: Drain through or in wall
50 mm
25 mm
air gap
300 mm
DN20 (¾") tank drain
(male)
OM-1006-1
50 mm
25 mm
open drain
300 mm
DN20 (¾") frame
drain (male)
DN20 (¾") tank
drain (male)
VM99-C-0400-M-0801.pdf 6 11/19/2009 9:51:54 AM