Introduction; Principles Of Operation - Aprilaire 800 Owner's Manual

INTRODUCTION

Thank you for your recent Aprilaire
your business and are pleased to add your name to our growing list of
customers. You have invested in the highest quality equipment available.
Aprilaire manufactures whole-house indoor air quality products and is a
recognized leader in the heating and air conditioning industry.
Your humidifier will require periodic maintenance to assure continued
consistent performance . See page 14 .
Please take a few minutes and read this booklet. This will familiarize
you with the benefits you will receive from the humidifier and help you
understand the routine maintenance that will be required .
Be sure to register your humidifier warranty online at:
www.aprilaire.com/warranty .
Genuine Aprilaire Replacement Model 80 Steam Canisters are
available from your installing contractor or from most other heating
and air conditioning contractors in your area. Use the dealer locator on
our web site (www.aprilaire.com) or look in the Yellow Pages under
Humidifying Apparatus or Heating & Air Conditioning Contractors.

PRINCIPLES OF OPERATION

The Aprilaire Model 800 Canister Steam Humidifier delivers humidity in the
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form of steam to the conditioned space via the HVAC system duct or optional
Aprilaire Model 850 Fan Pack. The humidifier generates steam by energizing
two electrodes that extend into a canister of water. Current flowing between
the electrodes causes the water to boil, creating steam. Water is introduced
to the humidifier through a fill valve to a fill cup located in the top of the
cabinet . The fill cup serves as an overflow reservoir and provides an air
gap between the humidifier and water source . The steam canister is filled
from the bottom. The canister is seated in a drain cup assembly which
includes a drain valve. The drain and fill valves work together to maintain
water level in the canister to deliver the rated steam capacity based on
the electrical conductivity of the water and to temper drain water. See
Figure 1 for representation of fill and drain system and canister.
Steam is delivered into the airstream through a dispersion tube mounted
in the HVAC system ductwork. Openings in the dispersion tube are fitted
with "tubelets
™
the dispersion tube and tubelets distribute steam over a wide area in the
duct and direct any condensed moisture back into the steam hose.
" which extend into the center of the tube. The design of
humidifier purchase. We appreciate
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