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KyleL
KyleL
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I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

Edit: Furnace model is Bryant 925t. Per the manual:

The HUM terminal is a 24 VAC output, energized when the gas valve relay is operating during a call for heat.

This seems like it wouldn't help since it's only available during the call for heat.

Edit 2: There is also a "EAC-1" terminal that is energized "whenever the blower operates". However, this operates at 115 VAC, not 24VAC. Is there a way I could use this?

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

Edit: Furnace model is Bryant 925t. Per the manual:

The HUM terminal is a 24 VAC output, energized when the gas valve relay is operating during a call for heat.

This seems like it wouldn't help since it's only available during the call for heat.

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

Edit: Furnace model is Bryant 925t. Per the manual:

The HUM terminal is a 24 VAC output, energized when the gas valve relay is operating during a call for heat.

This seems like it wouldn't help since it's only available during the call for heat.

Edit 2: There is also a "EAC-1" terminal that is energized "whenever the blower operates". However, this operates at 115 VAC, not 24VAC. Is there a way I could use this?

Added info on furnace
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KyleL
KyleL
  • 197
  • 2
  • 3
  • 11

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

Edit: Furnace model is Bryant 925t. Per the manual:

The HUM terminal is a 24 VAC output, energized when the gas valve relay is operating during a call for heat.

This seems like it wouldn't help since it's only available during the call for heat.

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?

Edit: Furnace model is Bryant 925t. Per the manual:

The HUM terminal is a 24 VAC output, energized when the gas valve relay is operating during a call for heat.

This seems like it wouldn't help since it's only available during the call for heat.

Source Link
KyleL
KyleL
  • 197
  • 2
  • 3
  • 11

How do I wire my furnace humidifier so it comes on any time the fan is on?

I have an Aprilaire 600a humidifier from a few years ago and currently it's wired into my furnace with two control wires labeled "W/G" and "Cf". The "W/G" is connected to the W terminal on the furnace (call for heat). The "Cf" is connected to "C". My understanding is that any time call for heat occurs, W is shorted to C, which is detected by my humidifier and it enables the flow of water.

I would like the humidifier to run any time the fan is on, not just when there's a call for heat. The fan control is determined by the "G" terminal. Is there a way to change my wiring to do this?