Troubleshooting guide

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Aprilaire Model 800 Steam Humidifier FAQs

General

Q: What is the Model 800 Aprilaire Steam Humidifier?

A: The Aprilaire Model 800 Steam Humidifier is a self-contained device that takes

tap water and boils it, using electrode technology, to create steam. 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. The steam flows through a steam hose and is injected into

a moving airstream by the way of a distribution tube. The steam flows out of the

distribution tube into the duct work through a series of small “tubelets” which

create an even, drip-free transfer of steam into the moving airstream.

Using Dri-Steem’s (who is the world’s leading expert on steam) dispersion tube

and “tubelet” technology, only the hottest, driest steam is introduced into the

duct.

Installation

Q: Are there types of water that the steam unit should not be connected to?

A: Yes. The unit should not be connected to deionized water (DI) or reverse

osmosis (RO) systems. Both DI and RO water lack enough conductivity required

for the humidifier to operate properly. In addition, DI water can have a corrosive

effect on the non-stainless steel components in the system, leading them to pre-

mature failure.

Q: Why must the unit be connected to cold water?

A: The humidifier uses the cold water to temper the boiling water as is it drains.

Adding cold water as the unit drains allows the unit to drain immediately without a

cool down period or the use of a high temperature condensate pump.

Q: How much hard piping can you use with the 6 ft. steam hose to extend the

distance from the humidifier to the steam distribution tube?

A: The maximum recommended length of steam hose is 6 ft. and maximum

recommended length of 1” insulated copper is 20 ft. The capacity of the

humidifier is reduced by the length of the steam hose or hard pipe due to

condensation. The distance between the steam humidifier and the dispersion

tube should be as short as possible. Refer to the steam humidifier capacity chart

in the installation instructions.

Summary of content (9 pages)

PAGE 1
Aprilaire Model 800 Steam Humidifier FAQs General Q: What is the Model 800 Aprilaire Steam Humidifier? A: The Aprilaire Model 800 Steam Humidifier is a self-contained device that takes tap water and boils it, using electrode technology, to create steam. 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.
PAGE 2
Q: Will standard 1” copper fit inside of the 6 ft. steam hose? A: 1” copper doesn’t easily fit inside of the steam hose, so we recommend using a standard ¾” to 1” copper adapter. The ¾” end of the adapter fits inside of the steam hose and can be secured with a hose clamp. The 1” side of the adapter will need to be soldered to the 1” copper pipe.
PAGE 3
Q: Can duct board or flex duct be used in conjunction with the Aprilaire steam humidifier? A: In order to support the weight of the steam distribution tube and steam hose, the distribution tube must be installed in a solid section of the metal ductwork; however, if absorption distance requirements have been met, there is no reason duct board flex duct could not be used in either the supply or return branches.
PAGE 4
Q: What are the power requirements for the humidifier? A: Humidifier draws 11.5 amps +/- 10%. Use 12.7 amps when sizing circuit. Q: What is the weight of the humidifier? A: The shipping weight of the unit is 20 lbs. and the operating weight is 23 lbs. Q: How does the canister seal inside of the humidifier and is there any leak protection? A: The steam hose connects to the top of the canister and is secured with a hose clamp.
PAGE 5
A: If multiple humidifiers are attached to the same furnace, they can be controlled by a single humidistat. If each unit is installed on separate HVAC systems, they will need to be controlled separately. Need a diagram from engineering. Q: If used in conjunction with the Aprilaire Model 8570 thermostat, will the humidity level be displayed? A: Yes.
PAGE 6
A: 10% to 45% RH. When the Automatic Digital Steam Humidifier Control is installed with the outdoor sensor, the control will automatically adjust the set point up and down as the outdoor temperature changes. The control is trying to provide as much humidity as possible without condensation forming on the windows and walls. If the control is installed in the manual mode, the homeowner will need to make all the adjustments.
PAGE 7
A: Replace the canister annually and when prompted by the “service” light. Use only a genuine Aprilaire Model 80 canister. Inspect the drain line to make sure it is not blocked and has constant downward slope. If water flow from the fill valve is restricted, turn off the water, disconnect the inlet fitting and remove the in-line strainer. Clean or replace strainer.
PAGE 8
  1 pint of water weighs 1.043 pounds 1 gallon of water weighs 8.3 pounds Model 800 conversions  120 volt capacity is 11.5 GPD  120 volt capacity is 92 pints per day (11.5 x 8)  92 pints = 95.96 pounds  120 volt capacity = 3.998 pounds of steam per hour (95.96 / 24 hrs)  240 volt capacity is 23.3 GPD  240 volt capacity is 186.4 pints per day (23.3 x 8)  190 pints = 194.4 pounds  240 volt capacity = 8.1 pounds of steam per hour (194.
PAGE 9
More than 85% of American homes have hard water. The softest waters occur in parts of the New England, South Atlantic-Gulf, Pacific Northwest, and Hawaii regions. Moderately hard waters are common in many of the rivers of the Tennessee, Great Lakes, Pacific Northwest, and Alaska regions. Hard and very hard waters are found in some of the streams in most of the regions throughout the country.