Question about Aprilaire 600 Humidifier

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Humidity too low

Aprilaire 600 humidifier. Humidity level in house won't go above 30%. What could the problem be? Water is flowing.

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  • jamesbarry00 Jan 15, 2009

    My humidifier has the same problem. I am wondering if it is related to the new Trane heating/AC system we had installed where they incorporated humidity control into there own thermostat. Even set at 60% with no frost protection it won't go above 30%.

  • goldenpaw Jan 17, 2009

    I have the 600A unit. Was installed in FEB 2008 by previous home owner. This is its first winter season. I have not been able to get RH above 20%...and no where near 35-40???? Outdoor probe seems fine...I have the controls set at 7 all of the time??? I even changed the coils inside?? According to all instructions the unit seems to be installed properly?? I have oak furniture cracking because its so dry in the house?? Regardless of exterior temperature? Both remote indoor sensor and sensor on the cold air return never get above 20% IRH.

    HELP???


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But by putting it in manual mose, you have to shut it sdown every season. With it in auto mode, and an outdoor sensor hooked up, you won't have to mess with it.

Posted on Feb 09, 2009

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I corrected the problem...RH is rising nicely!! Installed by "professionals" on my Trane XV90....I redid their wiring and now have the following setup...

600A water supply coming from hot water line.
Removed orifice inside incoming feed tube.
control incoming water flow from saddlevalve on hot water supply ( make sure its a nice solid flow, no drips, but no "force" too it either)..enough to insure entire evaporator unit is wet and water is slightly flowing out of bottom to drain.

I also have it wired to run when ever the furnace blower is on. Heat or no heat. XV90 is variable speed, and by doing this the 600a is always adding moisture, until it reaches correct RH%

Also, I disconnected the outdoor temp sensor. I went to Radio Shack and bought a 47K ohm resistor ( 1/2 watt....4 pack for 99 cents). Installed that in place of outdoor sensor...now runs in manual mode. Have unit currently set to number 5.



Posted on Jan 19, 2009

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1 Answer

Aprilaire 600 - water flow stopped to unit when running - chk'd lines and all ok - will run in manual mode on hudmidifer control (pt # 56) but with outside temp sensor connected seems to not register to...


Doesn't the float valve on the water sump control the level of water in the sump?

Do you have water to the valve? (Like loose the nut on the tubing-- does water come squirting out?)

If not, you can't get humidity into your system, without water in that sump or pan!
The mat can be turning-- but if it is not SOAKING WET!-- you get no humidity in the house!.

Could the main shut off valve be plugged?--

Bottom line is-- the Humidifier needs a steady supply of water-- It will go thru gallons of water every day, this time of the year!

Mack B

Jan 26, 2011 | Aprilaire Humidifiers

1 Answer

Should water be continualing running through the drain tube?


Water will flow over the filter pad as long as the unit is calling for humidity. once the unit is satisfied the solenoid valve should stop the water flow. if the water continues to flow with out call then solenoid valve has failed open. hope this helps.suppling an owners manual in case you need one.
http://www.aprilaire.com/themes/aa/en/manuals/AA-Humidifier-Owners.pdf

Dec 21, 2010 | Aprilaire 600 Humidifier

1 Answer

760 aprilaire humidifier does not let water to the filter. I have cleaned and checked the lines in and out of solenoid.


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  1. No click at the solenoid valve indicates an electrical problem. Contact your heating and air conditioning dealer to further check the electrical components of your Aprilaire Humidifier.

  1. The click sound at the solenoid valve indicates there is electricity to the solenoid valve. By turning the dial of your humidifier control to a setting above the “click point” you should see water coming out of the drain line within a few minutes which would indicate your humidifier is working.

  1. If the solenoid valve makes a click sound and there is no water draining from the unit, this would indicate the flow of water is being obstructed.

1. To determine if water flow is being obstructed, turn the dial of your humidifier control to the off position. The first location you would want to check for an obstruction would be at the saddle valve located on the water line supplying water to the humidifier. When checking the saddle valve, you want to make sure it is completely open. This can be done by turning the valve all the way to the left. If anything is clogged, it can be dislodged by turning the saddle valve all the way to the right and back to the left. Once this is done, turn the humidifier control dial above the click point and you should see water coming out the drain line.


If water is still not coming out of the drain, check the orifice and in-line strainer to make sure they are not clogged. The orifice is located in the tube on the discharge side of the solenoid valve and the in-line strainer is located on the inlet side of the solenoid valve. You may clear the orifice by inserting a needle through the small opening. Clean the strainer by running it under warm water to dislodge deposits or replace. After clearing and re-installing the orifice and strainer (be sure to double wrench all water connections), turn the humidifier control dial above the click point and you should see water coming out the drain line.

Mar 10, 2010 | Aprilaire Humidifiers

1 Answer

Aprilaire 560 will only click and flow water when turned to "test" does not work in any other settings?


Humidity must be hi enough in the house or Humidistat is not working. Do you any way to check humidity in the house?
If the Humidistat is set as Automatic, try to leave it as Manual.

Dec 03, 2009 | Aprilaire 700 Humidifier

1 Answer

Water only runs with humidistat in test/reset mode. Aprilaire 600 with an Aprilaire 56 Automatic Humidistat, both about 5 years old. Water line is clear, and test mode runs fine for the 1 minute interval....


you need to make sure your humidity level in the house isnt higher then what your humidifier will provide at any givin outdoor temp. this chart is in the owners manual. you cant remove the wires going to the ODS or it will give an error unless you have a resistor to put in its place. Anyway if the humidifier works in test mode according to AA it works so you may have higher humidity than you think, the highest your gonna get is 45% as the temp outside drops it will allow less humidity so it doesnt cause window condinsation (property damage) here is a copy of the chart. the #s on the left are the dial setting
TABLE 2 – % Relative Humidity Guide
Outdoor Temperature (°F)
-10°F 0°F 10°F 20°F 30°F 40°F
1
10% 10% 10% 15% 20% 25%
2 10% 10% 15% 20% 25% 30%
3 10% 15% 20% 25% 30% 35%
4 15% 20% 25% 30% 35% 40%
5 20% 25% 30% 35% 40% 45%
6 25% 30% 35% 40% 45% 45%
7 30% 35% 40% 45% 45% 45%

Nov 28, 2009 | Aprilaire 600 Humidifier

1 Answer

Testing a Aprilaire Humidifier 600 Controller


if it works in the test mode then it should be okay but you can get a humidity gauge from radio shack and set in the house to see how high or low its is. the humidifier is only going to give a max of 45% humidity

Nov 27, 2009 | Aprilaire 600 Humidifier

1 Answer

Aprilaire 600 humidity level too low


you may try running your blower 100% of the time.this should allow the humidifier to stay on even when your not heating. once the humidity level gets to where you want it, you may be able to put the fan selector back to auto. also you mentioned you have a variable blower. this is great if it is set up to run at approx. 20% fan speed when it is not heating or cooling. at 20% you can circulate enough air through the house to humidify without being able to hear the noise of the blower. it will really increase the comfort level of the house if you tend to have hot and cool spots. if it was not set up this way, contact the installer and ask if they can do this for you.

Jan 26, 2009 | Humidifiers

1 Answer

Aprilaire 600 humidity level too low


The max the aprilaire can put out is 45% Rh. Your humidifier may wired up to run only when the heat is on. In some cases this is not enough time to maintain your humidity level your seeking. To correct this, the hum. has to hooked up the hot side of the water supply. And the humidifier has to be hooked up when the fan runs and leave the fan run constantly

Jan 12, 2009 | Aprilaire 600 Humidifier

1 Answer

Aprilaire 600: water only runs in "Emergency" Heat mode


When your unit is on normal the outside unit works and the inside only the fan runs. your heat pump does not remove any humidity when it operates so the installation cotractor did not wire it to operate then. you can change the wiring on the humidifier to operate all the time by wiring it to the fan (g) terminal then it should work just turn it all the way to the lowest humidity when you are in cooling mode.

Jan 07, 2009 | Aprilaire 600 Humidifier

1 Answer

Aprilaire Humidifier Model 560 - Humidity Not Rising in House


water trough on top filling up. do not clean it too much as crud distributes water across top better.

Dec 25, 2008 | Aprilaire 700 Humidifier

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