SD Carel USA
13
7. Install Steam Hoses
NINETY PERCENT (90%) OF ALL OPERATION PROBLEMS ARE CREATED BY IMPROPER
STEAM PIPING FROM THE HUMIDIFIER UNIT TO THE DUCT DISTRIBUTOR PIPES.
To avoid these problems, remember one simple fact when running the steam hose: steam naturally flows up hill, and
condensate naturally flows down hill.
Nothing must impede the free flow of either steam to the distributor pipes or condensate back to the SD unit or the
drain. If Copper tubing is used, use two 45° angles or sweeping elbows rather than sharp 90° elbows.
Follow one simple rule: Run the steam hose or piping to avoid any kinks, sharp elbows, or low spots that could collect
or restrict the flow of steam to the distributor pipe, or the flow of condensate back to the humidifier. Support the hose
adequately to avoid sags.
The following diagrams are to provide you with some guidelines. If you have a situation you are unsure of, please
contact the factory for instructions.
IMPORTANT: Maximum length of rubber steam hose
is 20 feet. Insulated copper tubing may be up to 40 feet.
Hose sizes= 7/8" I.D. for units SD101-103, 303-305, 1 1/4" I.D. for units SD106, 308-3B3.
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