Installation & Maintenance Manual
12
6. Install Steam Distributor Pipes
If your SD 2000 humidifier was supplied with duct steam
distributor pipes, they must be mounted completely level in the
duct with the steam outlet holes facing up as shown to the
right. Support the end of longer distributor pipes if needed.
Distributor pipes should be mounted per the diagrams shown
below, with a minimum of 6” from the center of the distributor
pipe to the top of the duct and 3” minimum to the bottom.
Generally the distributor
pipes should be mounted in
the center of the air stream.
Multiple pipes need to be
staggered on a diagonal to
prevent the steam
discharge from the lower
pipes from impinging on the
upper ones.
In vertical ducts, the distributor pipes are mounted in the center
with the holes facing up as shown at right. The airflow may be up
or down, but when the airflow is down, maximum velocity is
1,500 fpm.
To install the distributor pipes:
1. Cut a key shaped hole in the side of the duct to match the steam pipe and
condensate return.
2. Apply silicone sealant to the mounting plate and insert the pipe through the
hole and secure it with 4 sheet metal screws.
3. Connect the steam and condensate hoses using the hose clamps supplied.
IMPORTANT: Allow 3 feet of straight duct downstream of the distributor
pipes when the air temperature will be >55
o
F. Allow 6 feet of straight duct
if the air temperature will be <50
o
F. Always allow 3 feet upstream.
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