Data Aire DAPA-2.5 Installation, Operation & Maintenance Manual page 76

Question 4: How much steam is generated by the humidifier? Can it be adjusted? Answer:
The amount of steam generated depends on the model of humidifier you have in your
Data Aire unit. To determine the model number, locate the product description label on the
Nortec humidifier. Match the model number to the table below to determine the amount of
steam generated. All humidifiers can be adjusted within the range minimum to 100%. Factory
setting is 60% of capacity.
Question 5: Is an air vent valve required in the piping when an expansion tank is used?
Answer: Yes, air vents must be installed in various locations in the piping system to purge air
and are required at the highest point in the piping system. One of the most common problems
in water/glycol systems is the presence of air in the condenser loop. In addition, an expansion
tank is recommended on glycol systems. See section 2.28 Water/Glycol Cooled Unit Piping
for more information.
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