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gabhroo

09:02PM | 07/20/06
Member Since: 07/20/06
3 lifetime posts
Bvelectrical
Hi - I have a Tamarak HV1000 whole house fan. The fan is connected to power source, and must always have one HOT/black lead supplied, as it has a cover that needs to close after it turns off.

Anyway, the fan is controlled via a standard light switch. The switch is supplied a black, white, and ground. The Intermatic Timer Switch E1210WC, has 4 wires (black, white, RED, and green).

The instructions state that the RED wire needs to be connected to the load - my fan in this case. White to nuetral, black to hot, and green to ground. Sounds simple enough ;).

I don't have RED!

Additionally, in this box where the switch is being replaced, I have another 3-way switch (controls the hallway light). There are two switches in the hallway. The one in the same box has a RED, White, and Black wire. Also, there is something "strange" - there is a black wire crimped together with a white wire. I'm not certain what that is.

I can get the fan to work, but only when either the light is ON or OFF, depending on where I connect the RED wire.

I read the instructions again - and this time, I connected Green to GND, black to black, red to white (I am assuming that either the black or white is considerd the load), and then I am connecting the white to the other switch in the wall. Again, in doing so I can only get the fan to turn on when the light is ON, or if I move the wire, when the light is OFF.

Any suggestions? (I've attached an image hope it helps!)
6106-how_to_replace_std_s

Billhart

05:36AM | 07/21/06
Member Since: 04/25/05
1915 lifetime posts
It appears that you have a single 2 wire cable that connects to the 3-way switch and to NOTHING ELSE and that NO OTHER WIRES connect to the 3 way switch.

If that is true then THERE IS NOTHING ON THAT 3 WAY SWITCH THAT CAN BE USED WITH THE TIMER OR FAN.

IT IS DANGEROUS TO JUST CONNECT TO AN UNKNOW CABLE JUST BECAUSE IT HAS A RED WIRE.

Now explain exactly what else is in the box and what connected to what with the old switch.

And go in the attic and check the fan. And see what is wired there.


gabhroo

06:57AM | 07/21/06
Member Since: 07/20/06
3 lifetime posts
In the image I posted, the switch to the right controls the hallway light. The corresponding switch in the other end of the hallway only has three wires coming in (red, black, white). I presume that's the matching pair, and that they somehow connect to the light fixture in the cieling. I don't think there should be any issues w/ that pair of switches.

The other pair of wires (crimped together) black and white, I'm not entirely certain where they originate, but I again presume since they were already there before the whole house fan went in, that they are somehow related to the hallway light.

As for the whole house fan, it was put in about 2yrs ago. It gets it's main power from a junction box that powers my two bathroom fans also. This was a new run put in, so it has a dedicatedd circuit in the breaker panel (15A) to run the 3 fans.

If you reference the picture I provided earlier, I have connected the white wire from the Intermatic switch to the white wire of the other switch. I am no able to operate the fan, but whenever the hallway light is turned on, the fan will go off.


Billhart

10:43AM | 07/21/06
Member Since: 04/25/05
1915 lifetime posts
"If you reference the picture I provided earlier, I have connected the white wire from the Intermatic switch to the white wire of the other switch. I am no able to operate the fan, but whenever the hallway light is turned on, the fan will go off."

I repeat. DO NOT CONNECT THE TIMER TO ANY WIRE ON THE 3 WAY SWITCH. THAT IS A COMPLETELY DIFFERENT CIRCUIT. And the white wire is not being used as a neutral, but rather as a traverler or a hot supply. It should have been remarked with tape or a marker, but it is often not done.

Based on what you describe the dedicated power for the fan goes direct to the fan. Then a switch leg was run down for the fan switch. If wired correctly the white wire should be connected to the hot and again remarked to something other than white or green. The back is then the switched hot that goes to the fan.

IF THAT IS THE CASE YOU HAVE NO NEUTRAL FROM THAT CIRCUIT IN THE BOX AND THUS YOU CAN NOT USE THAT TIMER, PERIOD!

You have two options if you want a timer. Get a spring wound timer. They come in 1 hr and 12 hr (and I think a couple of others) and you just turn the knob for the amount of time that you want.

Here is one example.

http://www.rewci.com/in12inspwoti.html

http://www.intermatic.com/?action=subcat&sid=96

Or you can get an electrican to replace the existing cable from the fan with a 3 wire cable.

Assuming that this is in an interior wall near the fan and that there is reasonable access to the fan then it should not be a difficult job.


gabhroo

01:12PM | 07/21/06
Member Since: 07/20/06
3 lifetime posts
Thanks for the information - that is what I concluded after more thought. There is no neutral in the box :). My consideration at this point is to run a 3-wire (as you mentioned) from the fan to the switch. This will provide me the leads I need.

Thanks again!
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