Humidifiers and Dehumidifiers - Sail switch vs A50 relay

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chengka
02-28-05, 03:40 PM
Hello,
I'll be replacing an ancient ArilAire A112 with an A700 and in an effort to avoid last minute trips to a supplier I have a question for the experts.

Is a "sail switch" a viable alternative to an A50? My current A112 has a manual humidistat and a sail switch, but no A50. The furnace has been replaced and I could probably use the humifier terminals, but it seems a blower sensor is more flexible. I hate to ask without seeing the install guide, but wasting the weekend waiting for the hvac store to open would be a drag.

Thanks guys,
Ken

Ed Imeduc
03-01-05, 11:13 AM
A sail switch just has to many why it dont work. Dirt ,out a balance. So the humidifier works best if just on its own not on the furnace board. That means for sure get a current sensing relay to use. Check out what one you need A A50 is for 24 volts and he A51 is for 120volts. They work like an amprobe just slip around the blower wires Any time the blower is on it will turn the humidifier on if the humidistat calls for it.

ED ;)