Aprilaire 800 Series Steam Humidifier Instruction Manual

Name: Aprilaire 800 Series Steam Humidifier Instruction Manual
Brand: Manualverse
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Aprilaire 800 Series Steam Humidifier Instruction Manual

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Aprilaire 800 Series Steam Humidifier

Aprilaire 800 Series Instructions

Here we offer the Aprilaire 800 Series Steam Humidifier manual completely free and in English. We have cataloged this manual in the Humidifiers section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Aprilaire 800 Series Steam Humidifier, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.

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Aprilaire 800 Series Steam Humidifier Specifications

Category	Specification
Humidifier Models	800, 800LC, 801, 865, 866
Input Voltage Options	120 VAC, 208 VAC, 240 VAC
Input Amperage Options	11.5 Amps (nominal), 16.0 Amps (nominal)
Max Steam Capacity (120V)	11.5 Amps: 11.5 gal/day 16.0 Amps: 16.0 gal/day
Max Steam Capacity (208V)	11.5 Amps: 20.5 gal/day 16.0 Amps: 30.0 gal/day
Max Steam Capacity (240V)	11.5 Amps: 23.3 gal/day 16.0 Amps: 34.6 gal/day
Max Recommended Home Size (240V, 16.0A)	Tight: 6,000 sq ft Average: 4,000 sq ft Loose: 2,500 sq ft
Shipping Weight (Model 800 Series)	28 lbs
Shipping Weight (Model 865)	39 lbs
Operating Weight	23 lbs (approx. 30 lbs with minerals)
Dimensions (H x W x D)	20-7/8" x 10-1/8" x 7-1/8"
Recommended Water Conductivity	100 - 1,250 µS/cm
Water Hardness Correlation	3 - 36 grains/gallon
Supply Water Pressure	25 - 120 psi
Canister Types	Model 80 (Hard/Softened Water), Model 80LC (Low Conductivity Water, 120VAC)
Max Steam Hose Length	6 feet (standard hose)
Steam Pipe Material (for > 6 ft)	1" O.D. metal or copper pipe (insulated with 1" thick insulation rated for 212°F+)
Steam Hose/Pipe Slope	2" per foot downward (hose), 1/4" per foot downward (hard pipe)
Max Operating Ambient Temperature	140°F (no freezing temperatures)

Aprilaire 800 Series Humidifier Details

Aprilaire 800 Series steam humidifiers deliver humidity as steam using an HVAC system or optional Fan Pack. Steam is generated by energizing electrodes that boil water within a canister. A fill cup provides an essential air gap between the humidifier and the water source. The fill and drain valves collaboratively manage the water level, ensure rated steam capacity based on water conductivity, and temper drain water effectively.

For seamless HVAC integration, the Model 62 Automatic Digital Humidifier Control (ADHC) monitors return air relative humidity (RH). If RH falls below the set point, and the HVAC blower is operational, the ADHC activates the humidifier. Steam is then dispersed into the ductwork via a specialized tube with "Tubelets" designed for wide, even distribution, while redirecting condensed moisture back to the steam hose.

Alternatively, the optional Fan Pack allows direct humidity distribution into the living space. When the Model 65 Manual Digital Humidistat detects RH below its setting, the humidifier provides steam to the Fan Pack’s manifold. A fan behind the grille disperses the steam. This fan continues to operate for two minutes after the call for humidity ends, ensuring any residual steam is fully dispersed.

The Model 63 Automatic Digital Modulating Control (ADMC) offers precise, proportional control for the modulating steam humidifier. It varies steam output based on the RH difference from the set point. The ADMC can be wall-mounted in the living space or configured to use a duct humidity sensor. It significantly enhances comfort and efficiency through fine-tuned humidity management, also providing On/Off control for standard models.

The humidifier operates optimally with water conductivity between 100 and 1,250 uS/cm, correlating to 3-36 grains/gallon hardness. Two canisters are available: Model 80 for hard/softened water (ideal for 208/240VAC) and Model 80LC for low-conductivity water (suitable for 120VAC, not softened). As minerals accumulate, the internal controller adjusts water levels. A flashing red Service light indicates the canister needs replacement.

Careful installation is vital. The dispersion tube should ideally be mounted higher than the humidifier, ensuring a continuous downward slope for the steam hose to prevent condensate accumulation. If such elevation is impossible, a drip tee with a drain trap (Part #4028) must be installed. Steam hose length affects capacity, with insulated hard pipe recommended for runs exceeding six feet. Clearances for service access are also essential.

The display panel provides clear operational indicators: green lights signify normal functioning (On/Off, Fill, Steam, Drain). A yellow Steam light suggests operation below rated capacity, often due to low water conductivity or initial startup. A flashing red Service light signals imminent canister replacement. Solid red lights denote a critical shutdown requiring professional service. Always disconnect power before any maintenance.

Regular maintenance ensures longevity and efficiency. This includes inspecting electrode connections, plumbing, drain, and steam lines for integrity. Canister replacement is a primary task, performed after shutdown and power disconnection, involving careful removal and installation with a new O-ring. Cleaning the drain valve reservoir and checking the fill valve's in-line strainer are also crucial steps for sustained performance.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Aprilaire 800 Series Steam Humidifier, and we answer them below.

What causes the humidifier to make a gurgling sound?

Gurgling typically results from excessive condensation in the steam hose. To resolve this, ensure the steam hose has a constant downward slope to the humidifier or to any installed tees and traps in low spots. If using hard pipe, confirm it is properly insulated. Installing a Tee and Trap Model 4028 can also help.

Why is water constantly running down the drain from the humidifier?

This usually indicates debris in the drain valve preventing it from closing properly, or the O-ring in the drain valve is not correctly seated or is damaged. Remove the canister, clean any debris from the drain valve, and inspect/replace the O-ring, ensuring it's properly seated.

The humidifier is not filling. What should I check?

First, ensure the saddle valve is fully open and has pierced the pipe. Next, inspect all internal hoses for kinks or blockages that might restrict water flow.

My display panel shows a yellow 'Steam' light. What does this mean?

A yellow 'Steam' light indicates the humidifier is operating below its rated capacity. This is normal during initial startup with low-conductivity water or during short operating cycles. It can also signify that the Model 80 canister is used with very low conductivity water; consider switching to a Model 80LC canister or adding a small amount of salt to the fill cup as directed in the manual.

What does a flashing red 'Service' light on the display panel mean?

A flashing red 'Service' light indicates that the steam canister is nearing the end of its operational life due to mineral deposits. While the humidifier will continue to operate, its capacity may be reduced. It's time to consider replacing the canister to maintain optimal humidity levels.

Can I use hot water for the humidifier's supply?

No, the humidifier should be plumbed to cold water only. Unheated supply water is used to cool the water draining from the humidifier, ensuring it's below 140°F before discharge. Using hot water would compromise this cooling function.

Why is there water collecting in the ductwork?

Water in the duct can be caused by the dispersion tube being installed incorrectly (tubelets not facing up), impurities in the steam hose or pipe causing foaming in the canister, or insufficient absorption distance for the steam. Verify dispersion tube orientation, clean the system, and calculate appropriate absorption distance.

How often should I replace the electrode wires?

It is recommended to change out the electrode wires every 3 years (Part #4978) as part of routine maintenance to ensure secure connections and efficient operation.

What if my supply water pressure is too high?

Supply water pressure greater than 120 psi may cause the humidifier to overflow. If your pressure is too high, you may need to install a pressure reducer. The ideal operating pressure is between 25 psi and 120 psi.

The humidifier's fill valve is making a banging sound. How can I fix this?

This "water hammer" noise can be addressed by ensuring the water supply line doesn't contact ductwork. Installing a shock arrestor or a section of 1/4" braided fill line can help. If pressure exceeds 120 psi, a pressure reducer is needed.

How can I optimize humidifier performance with low water conductivity?

If your water has low conductivity (below 300 uS/cm), consider using the Model 80LC canister, especially at 120VAC. Operating the humidifier on 208/240 volts can also help. Additionally, activating the HVAC blower for longer cycles or running it constantly allows more time to concentrate minerals, increasing conductivity.

What are the minimum clearances required around the humidifier for mounting?

Minimum clearances are: 16 inches for the steam hose (top), 4 inches for electrical access (side), 16 inches for drain access (bottom), and 30 inches for overall service access (front/side).