Water seeping through drain spud area of Aprilaire 600 model.

You can purchase the tubing at most hardware stores or any HVAC supply store. They carry the vinyl plastic tubing and pvc pipe for drain lines.

Sorry to read about your problem, I hope this helps you out.

you must have a defective water inlet valve, and its letting water in, just a little.. it maybe dirt in the valve, clogging it.

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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

Typically, we find that the most common reason that you start to see leaking from the humidifier is that the water panel is not changed frequently enough. We do recommend that the water panel be changed once every humidifying season. We find a majority of our customers do this maintenance typically at the start of the humidifying season.

Here are the things to check when troubleshooting a power humidifier, which is leaking:

1.Position Of Unit On Plenum
Is the unit level (let to right)?
Is it plumb (front to back)?

2.Feed Tube
Is the Feed Tube tightened or is there a crack in the tube?

3.Position Of Scale control insert-
Is the base of the scale control insert sitting firmly in the drain spud at the base of the housing?
Does the bottom of the scale control insert have a taper to it to direct water to the drain spud?
Is the Scale control insert positioned correctly? The scale control insert has a front and a back. The back of the water distribution tray has an indentation in it to allow for clearance of the nozzle, which is attached to the top of the base. If reversed, and forced into place, the water distribution tray will break off the nozzle attached to the water feed tube and potentially the housing, causing water to leak

4.Water Panel Assembly-
Are there aluminum strands hanging out of the scale control insert?
Is there a gap between the top of the water panel and the water distribution tray for air to go through?
Is the colored dot on the water panel, up?
Is there a consistent coating on the Water panel, or are there shinny spots or clumps of coating?

5.Water Entrainment (Water Blowing out of the Humidifier)-
Are there signs of entrainment? Mineral build-up on fan blade, shroud, inside of cover?
Is the static pressure in the plenum over .4w.c.? If so, entrainment and leaking could occur.

6.Missing Orifice
If there is no orifice in the unit, the water entering the system could flood the panel. To check
for proper water flow, a quart jar should fill at the drain line in about 2 ½ minutes for a red or blue orifice, 5 minutes for a white or yellow orifice.

7.Drain line-
Is the drain line plugged?
Does it have a good downward slope?
Is it teed with any other drain lines?

If the above items do not resolve the existing leaking we would recommend contacting the customer service line at 800-334-6011 for further technical support.

Regards,



Tracey Hadju
Customer Service Specialist
Research Products Corporation
www.aprilaire.com

The fan on the model 700 does rotate backwards compared to your typical fan operation. This fan will pull air from the duct verses pushing air into the duct. There are several things that may cause your humidifier to leak. The most known reason for leaking is the water panel/filter is not being changed frequently enough which should be at least once every heating season. You also want to confirm that you are utilizing an authentic Aprilaire water panel.

• Is the Feed Tube tightened or is there a crack in the tube?

· Is the base of the scale control insert sitting firmly in the drain spud at the base of the housing?
· Does the bottom of the scale control insert have a taper to it to direct water to the drain spud?
· Is the Scale control insert positioned correctly? The scale control insert has a front and a back. The back of the water distribution tray has an indentation in it to allow for clearance of the nozzle, which is attached to the top of the base. If reversed, and forced into place, the water distribution tray will break off the nozzle attached to the water feed tube and potentially the housing, causing water to leak
· Is there a gap between the top of the water panel and the water distribution tray for air to go through?
· Is the colored dot on the water panel, up?
· Are there signs of entrainment? Mineral build-up on fan blade, shroud, inside of cover?

Most likely you have too much water going to the unit you may have to throttle down the water valve that is tapped into the domestic water source. Also check to see if the tray is in the spud going to the drain

Here's a link to the manual for your Aprilaire model 560 humidifier you can download and print for free.

According to Aprilaire, it is normal for there to be excess water going into the drain pan. However, the drain pan should have a drain line connected to it so the contaminents from the humidifier can be flushed down a drain and away from the unit. (see page 2 Principle of Operation).

They further state that the water valve should only be either fully on or fully shut off and do not attempt to regulate water flow with the inlet supply valve.

http://www.aprilaire.com/themes/aa/en/manuals/Humidifiers_Owners_Manual.pdf

I would give the unit a good cleaning of the pan, locate the drain connection and attach a drain line to your unit as is required for proper operation and function/

Hope you find this Very Helpful - Best regards!

A small discharge of water coming out of the bottom of an April Aire drain spud is normal. This feature constantly tries to rinse the system. This helps to prevent the possibility of mold or bacteria accumulating in the unit from standing water. It may appear to be alot of water. But be reassured that you are breathing in cleaner air. Now if it continues to drain constantly even when it is turned off then you should repair the unit.

The water is only dispensing over the evaporator pad while the furnace is in the heating mode. When the furnace finishes cycling the humidifier will also stop.

Modle 110 has a relay in it see if it is stuck.Hope this helps