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Anonymous Posted on Dec 18, 2010

How far should the humidastate be from the main unit on an aprilaire 550 to get an acurate reading

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Robert

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  • Aprilaire Master 1,036 Answers
  • Posted on Dec 19, 2010
Robert
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Joined: Dec 19, 2010
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The humidistat should be mounted in the return air duct, does not really matter how far it is from humidifier as long as it is in the return air duct.

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1answer

How do i know that it is working? aprilaire 550 is approx 8 yrs old. it seems as if i still get shocks and my house is dry..

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

simple you should see water running inside the unit, you can turn on.keep the cover off..

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question. take the time to rate us.Thanks and good luck

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I have an old Aprilaire 550. Can't get the humidity to desired level of 40-45% humidity, only 36-39%. Is there anything I can do. Water is very hard in my home could this be the reason why water isn't...

Sorry to read about your problem, I hope this helps you out.
You are at the limit of what the unit can do.
One little thing you can do is see if the unit is hooked up to hot water instead of cold water.

OUTSIDE TEMPERATURE RECOMMENDED SETTING
-20F -29C 15%
-10F -23C 20%
0F -18C 25%
+10F -29C 30%
+20F - 7C 35%
+30F - 1C 40%

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

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0helpful
1answer

I have an Aprilaire 550 hooked up to my furnace,

in order for the humidifier to come on with the heater there has to be a temperature sense curuit to turn it on/off at a certain temp, the humidity curcuit on the unit will turn it off at set %
2helpful
1answer

I don't know how open 550 unit to check or change water level.

sould be a small handle on the oppisite side frm the duct outlet. it just pops off
0helpful
1answer

Aprilaire model 760

It could be that the humidistat is not calling for humidity. Make sure that you have the dial turned up all the way (as far as it will go, just to test it) and that the blower on the furnace is running - if the unit is properly wired, the water will not run unless the blower on the furnace is running. This should do the trick. If not, the only other thing would be a bad humidistat. Good Luck!
0helpful
2answers

Routing waterline to pad

1/4" flexible copper pipe. Tap into your cold water line using the included saddle valve (pierces the pipe), attach the 1/4" flexible copper pipe to the saddle valve on the cold water pipe and the solenoid valve on humidifier unit using the included compression fittings. Tada!
0helpful
1answer

Transformer

It sounds like a wiring problem. If you still have the instructions that came with the unit, look at the wiring diagram and make sure you have everything right. If you dont have the instructions, you can find them online. Be careful you dont zap yourself! When you're in there playing around with wires make sure you kill the power to the furnace at the breaker. Double check this with a voltage tester if you have one. Also, if you're not sure you may want to disconnect the unit until you can afford to have a qualified professional look at it or you may end up doing more harm than good.
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