Aprilaire 760 issue.
#1
01-26-13, 05:24 PM
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Aprilaire 760 issue.
I have an Aprilaire 760 which always seems to give me issues every few years. This time around, the fan and water do not work.
First, let me address the water: This is typically a frozen solenoid valve which has happened once before from water deposits. Yes I am putting in a filter this go around when I replace it.
My main issue is the fan does not start. This is where I'm at.
Fan: If I jump the brown wires the fan does turn on and runs. (Yes, I can also hear the water solenoid click see above)
Furnace Relay Output: Reads 25-26v when the furnace is running.
Humidistat: Reads 25-26v from the common wire of the relay and switched side of the Humidistat when the circuit is closed. When is opened/humidistat is turn off, voltage is 0 as expected.
Brown Wires: Reads 25-26v when the Humidistat circuit is closed.
I seem to have 24+v everywhere I check. If the relay is bad on the fan motor would jumping the brown wires still allow the fan to run?
First, let me address the water: This is typically a frozen solenoid valve which has happened once before from water deposits. Yes I am putting in a filter this go around when I replace it.
My main issue is the fan does not start. This is where I'm at.
Fan: If I jump the brown wires the fan does turn on and runs. (Yes, I can also hear the water solenoid click see above)
Furnace Relay Output: Reads 25-26v when the furnace is running.
Humidistat: Reads 25-26v from the common wire of the relay and switched side of the Humidistat when the circuit is closed. When is opened/humidistat is turn off, voltage is 0 as expected.
Brown Wires: Reads 25-26v when the Humidistat circuit is closed.
I seem to have 24+v everywhere I check. If the relay is bad on the fan motor would jumping the brown wires still allow the fan to run?
#3
01-26-13, 05:46 PM
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The outside says Aprilaire, the inside says model #883321B. It has 2 terminals and is analog. I should also note that I have bypassed the humidistat with no luck.
Does it happen to do something with the voltage or just open/close the circuit depending on the setting?
Here is the replacement: RP-4016 Aprilaire 4016 Manual Humidistat
Does it happen to do something with the voltage or just open/close the circuit depending on the setting?
Here is the replacement: RP-4016 Aprilaire 4016 Manual Humidistat
#4
01-26-13, 06:19 PM
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ACK, ok, now that I have more of a clue. The 24v I was reading was from the Aprilaire unit it's self.
I read 0v from the Current Sensing Relay. So this gives me a direction, thanks Jay.
It's a white-rodgers [h=2]Model # 90-293Q. Single pole Double throw. I'm wondering if it is bad or during the last cleaning/maintenance the wires were not hooked up right.[/h]
I'm believe the wires on terminal blocks 1/3 are correct. Not sure what the other two should be on which runs to the aprilaire unit/humidistat. Currently they are on posts 4 and 5. Not sure if either should be on post 2 instead.
http://www.emersonclimate.com/Documents/White-Rodgers/catalog_06_pages/Cat_06_pg0114.pdf
Diagram for SPDT.
I read 0v from the Current Sensing Relay. So this gives me a direction, thanks Jay.
It's a white-rodgers [h=2]Model # 90-293Q. Single pole Double throw. I'm wondering if it is bad or during the last cleaning/maintenance the wires were not hooked up right.[/h]
I'm believe the wires on terminal blocks 1/3 are correct. Not sure what the other two should be on which runs to the aprilaire unit/humidistat. Currently they are on posts 4 and 5. Not sure if either should be on post 2 instead.
http://www.emersonclimate.com/Documents/White-Rodgers/catalog_06_pages/Cat_06_pg0114.pdf
Diagram for SPDT.
#5
01-26-13, 06:40 PM
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The humidistat is a simple open/close switch.
How is this all wired up? I don't understand why you'd have a current sensing relay along with the SPDT relay?
How is this all wired up? I don't understand why you'd have a current sensing relay along with the SPDT relay?
#6
01-26-13, 06:42 PM
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I though that was one in the same, (current sensing/spdt). I have 1 relay only, the SPDT which goes go the aprilaire/humidistat.
#8
01-26-13, 06:58 PM
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A 120V/24V Transformer which is putting out roughly 25v goes to terminal leads 1/3.
A pair of yellow wires comes from the furnace/blower area. One of the wires goes to terminal 4.
The other yellow wire goes up to the humidistat, then from the humidistat to the Aprilaire (brown wire).
Terminal 5 leads directly to the Aprilaire (other brown wire).
A pair of yellow wires comes from the furnace/blower area. One of the wires goes to terminal 4.
The other yellow wire goes up to the humidistat, then from the humidistat to the Aprilaire (brown wire).
Terminal 5 leads directly to the Aprilaire (other brown wire).
#9
01-26-13, 07:08 PM
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Do you know where the line voltage side of this transformer going to?
The two yellow wires is that going some where else other than to the humidifier/humidistat?
The two yellow wires is that going some where else other than to the humidifier/humidistat?
