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With your purchase of a humidification system, you have invested in a
humidifier that operates on the evaporative principle – nature’s own way
of adding moisture – and will provide the proper relative humidity all
during the heating season. It is very possible that you have questions
concerning your humidifier – questions on what it can do for you, and what
you should do to receive maximum benefits from it. This booklet is
intended to help you do exactly that.
Nature, in producing an invigorating comfortable April day, combines just
the right temperature and the right amount of moisture. Aprilaire
Humidifiers employ the same principle, with refinements, to give you the
proper relative humidity for maximum allowable comfort all winter long.
The important considerations in the evaluation of a humidifier are Positive
Control, Sufficient Capacity, Trouble-free Performance and Minimum
Maintenance. The operating principle of your Aprilaire provides all of these
advantages. Here, briefly, is the method:
The Aprilaire Humidifier (except the Models 350 and 360) is installed to
operate in conjunction with the furnace blower motor. When the
humidistat or Humidifier Control calls for humidity and the blower motor is
operating, water flows to the distribution tray located at the top of the
unit. The water is uniformly distributed across the width of the tray and
through a scientifically designed system of outlets. It flows by gravity over
the Water Panel
®
evaporator, the heart of the unit. Dry, hot air is moved
through the moisture-laden Water Panel evaporator where evaporation
takes place. The now humidified air carrying moisture in vapor form
(nature’s own way) is circulated throughout the home.
The Models 350 and 360 use service hot water (140°F maximum) for its
heat source, as heat is needed for evaporation. While the water going to
the unit is hot, the flushing water to the drain will be cold. The heat is
extracted during the evaporation process.
The correct water flow is determined by an orifice included with
each drain type unit. When the unit is operating, there will be a
small, steady stream of water to drain, which flushes away most of
the trouble-causing minerals. Do not use the saddle valve to regulate
the water flow. It is designed to be completely opened or closed. The
minerals and solid residue not trapped by the replaceable Water Panel
evaporator are flushed down the drain in units with a drain connection.
The drain also eliminates the problems caused by stagnant water. This is
the most effective and least expensive method to dispose of trouble-
causing minerals.
I. PRINCIPLE OF OPERATION