Aprilaire 800 Series User Manual (English)

Other manuals for Aprilaire 800 Series

Troubleshooting Guide11 pages

Installation & Maintenance Instructions64 pages

Maintenance Instruction2 pages

Questions and Answers:

K
Kari JordanSep 6, 2025
What does solid red fill light mean on Aprilaire 800?
- A
  Adam MorganSep 6, 2025
  If your Aprilaire Humidifier displays a solid red fill light, it means the fill valve has been filling for 40 minutes. Ensure the high water pin wire is securely installed. Check the steam hose, making sure it's supported along its length with a 2” per foot slope from the dispersion tube to the humidifier to prevent low spots. Also, verify that the dispersion tube isn't discharging into a duct with static pressure greater than 2.0 in. wg, and that the dispersion tube tubelets are pointed up.
J
Jill LopezSep 5, 2025
What causes excess humidity with Aprilaire 800?
- B
  Brian PatelSep 5, 2025
  If there's excess humidity in your home, and you have an Aprilaire Humidifier, the control setting might be too high. Try adjusting it to a lower setting. Also, make sure the control is mounted in the correct location as per the installation instructions.
M
Michele WalkerSep 4, 2025
Why is my Aprilaire 800 Humidifier not satisfying demand?
- M
  Megan ArnoldSep 4, 2025
  If your Aprilaire Humidifier isn't satisfying demand, the control setting may be too low; try adjusting it to a higher setting. Ensure the control is mounted in the correct location. Use the blower activation feature on the ADHC or run the HVAC fan constantly to avoid short run times. If the humidifier capacity is limited by input power, operate it on 208/240 volts. You can also increase the capacity to 16.0 amps, ensuring the breaker is appropriately sized.
T
Taylor RoseAug 23, 2025
How to troubleshoot Aprilaire Humidifier that will not turn on or off?
- A
  Amber HebertAug 23, 2025
  If your Aprilaire Humidifier won't turn on or off, start by checking the main power supply and switch. Ensure the front cover is attached properly to engage the safety interlock switch, and press the On/Off button. Verify the L1, N/L2, and ground connections are correctly wired with the appropriate voltage present. Also, check the electrode and high water probe connections on top of the canister, and ensure the ribbon cable from the membrane switch is securely plugged into the control circuit board. Confirm that the black/white wire is attached to the terminal matching the input voltage. Check the HUMIDISTAT and FAN PACK terminal connections and make sure the breaker is appropriately sized for the amperage draw. Finally, verify the voltage across the L1 and N/L2 terminals.
R
robinmatthewsSep 2, 2025
Why is there water in duct coming from Aprilaire 800 Humidifier?
- A
  Adrian MitchellSep 2, 2025
  If you notice water in the duct, it may be because the dispersion tube is installed incorrectly. Ensure the dispersion tube is installed with the tubelets facing straight up. Additionally, rinse the canister, fill hose, and fill cup with clean water to remove any impurities causing foaming. Determine the necessary absorption distance.
S
selenavalenzuelaSep 2, 2025
What to do if Aprilaire Humidifier will not drain?
- R
  Rebekah BrownSep 2, 2025
  If your Aprilaire Humidifier is not draining, remove the canister and clean any debris from the drain valve that might be blocking the outlet port.
A
Andre CarpenterSep 1, 2025
Why is water constantly running down drain of Aprilaire Humidifier?
- P
  Phillip MillerSep 1, 2025
  If water is constantly running down the drain of your Aprilaire Humidifier, there might be debris in the drain valve preventing it from closing. Remove the canister and clean any debris from the drain valve. Also, check the O-ring in the drain valve to ensure it's properly seated and not damaged; replace it if necessary. If water is flowing from the fill cup overflow port, inspect the internal hoses for kinks or blockages. Ensure the dispersion tube tubelets are pointed up and that the dispersion tube isn't discharging into a duct with static pressure greater than 2.0 in. wg.
J
Jason MolinaAug 31, 2025
Why is fill valve making banging sound in my Aprilaire 800?
- J
  Jessica SolisAug 31, 2025
  If the fill valve on your Aprilaire Humidifier is making a banging sound, it could be due to water hammer from the line pressure. Make sure the water supply line isn't touching the ductwork. Consider installing a shock arrestor or a section of 1/4" braided fill line, following local codes. If the water supply pressure exceeds 120 psi, install a pressure reducer.
A
awilsonAug 30, 2025
What to do if the steam light does not turn on in Aprilaire 800?
- A
  Amanda WalterAug 30, 2025
  If the steam light on your Aprilaire Humidifier isn't turning on, the unit might not be receiving a call for humidity. Check the humidistat wiring and setting, ensuring you haven't left the ADHC in TEST mode. Also, inspect the wiring and settings of the high RH limit switch and airflow proving switch.
J
James Marquez PhDAug 29, 2025
Why does my Aprilaire Humidifier make a gurgling sound?
- M
  Matthew HigginsAug 29, 2025
  If your Aprilaire Humidifier is making a gurgling sound, it could be due to excess condensation in the steam hose. Install a Tee and Trap Model 4028. Ensure the steam hose has a constant downward slope towards the humidifier or to tees and traps in low spots. If you're using hard pipe for the dispersion system, make sure it's insulated.

Aprilaire 800 Series Specifications

General

Type	Steam Humidifier
Installation	Professional installation recommended
Warranty	5-Year Limited Warranty
Coverage Area	Up to 6, 200 sq. ft.
Control	Automatic or manual control
Capacity	11.5, 16.0, 23.3, or 34.6 gallons per day (depending on model)
Voltage	120V or 240V (depending on model)