I just purchased a new humidifier (attaches to the furnace). Do I wire
it from the blower and if so, how do I know what wires to attach from
the blower to the humidifier? It's a mess of wires in there!

I wired it from the switch straight to the humidifier. It works but
continuously flows water. I assume this needs to be wired to the
blower but I want to be sure I wire it correctly.

I do not think it gets wired to the blower simply because if you just
turn your fan on at the thermostat, the humidifier will constantly be
on.
On my furnace, the humidifier kicks on only when the heat is on, but
once the heat has been satisfied and the gas burner kicks off, the
humidifier also goes off, even if the fan stays on. I do not think the
humidifier will do it's job correctly if just the fan is on and no heat
passing through it.
On my Trane XR 80 furnace, the humidifier is hooked up to the C and Y
terminals on the board. This is not to say you furnace is similiar,
but just to give you a reference.
What does the instructions say that came with the humidifier when you
purchased it?

wrote in message
oups.com...
I just purchased a new humidifier (attaches to the furnace). Do I wire
it from the blower and if so, how do I know what wires to attach from
the blower to the humidifier? It's a mess of wires in there!

I wired it from the switch straight to the humidifier. It works but
continuously flows water. I assume this needs to be wired to the
blower but I want to be sure I wire it correctly.

Best thing to do is purchase a current sensing realy OR get a "sail" switch.

Dr. Hardcrab wrote:

wrote:

I just purchased a new humidifier (attaches to the furnace). Do I wire
it from the blower and if so, how do I know what wires to attach from
the blower to the humidifier? It's a mess of wires in there!

I wired it from the switch straight to the humidifier. It works but
continuously flows water. I assume this needs to be wired to the
blower but I want to be sure I wire it correctly.

Best thing to do is purchase a current sensing realy OR get a "sail" switch.

Best thing to do is caulk the house and trash the humidifier.

Nick

wrote:
I just purchased a new humidifier (attaches to the furnace). Do I wire
it from the blower and if so, how do I know what wires to attach from
the blower to the humidifier? It's a mess of wires in there!

I wired it from the switch straight to the humidifier. It works but
continuously flows water. I assume this needs to be wired to the
blower but I want to be sure I wire it correctly.

What do the instructions say???? I suggest you follow the installation
instructions. Different humidifiers may need different installation.

--
Joseph Meehan

Dia duit

Part of my problem is that the installation instructions that came with
the humidifier are extremely vague. They don't tell me anything.

I bought a Honeywell Humidifier, and for $70 more, I could have
purchased the installation kit to go with it. I didn't need any more
parts except the installation kit comes with a video tape installation
instructions.

I couldn't justify spending the $$ for a video tape.

Anyway, since I have it wired directly from the power source to the
transformer to the humidifier, the humidifier will run all the time,
whether the furnace is on or off. That is why I thought the wiring
needed to be changed but I am still confused.

Help!

You say it runs all the time, do you mean it pours water. Humidifers
for forced air do not need the wasted cost of running a fan, air blowes
over an evaporator pad.

You sure the install kit didn't include a current sensing relay, or a
sail switch?

How a specific unit should be wired will vary. But in general, there
are several options:

1 - Wired direct to go on when the blower turns on

2 - Wired direct to go on when the burner is on

3 - Wired using a current sensing relay to go on either with the blower
or burner

4 - Wired with a sail switch to go on with the blower.

Whic option is best depends on the furnace, the humidifier, and how
easy/hard any of these options is for that particular install.

wrote:
Part of my problem is that the installation instructions that came
with the humidifier are extremely vague. They don't tell me anything.

I bought a Honeywell Humidifier, and for $70 more, I could have
purchased the installation kit to go with it. I didn't need any more
parts except the installation kit comes with a video tape installation
instructions.

I couldn't justify spending the $$ for a video tape.

Anyway, since I have it wired directly from the power source to the
transformer to the humidifier, the humidifier will run all the time,
whether the furnace is on or off. That is why I thought the wiring
needed to be changed but I am still confused.

Help!

I don't think I would want a product like that from a company that did
not bother to provide installation instructions. I wonder what other
shortcuts they took.




--
Joseph Meehan

Dia duit