Hello
I did installed the unit but it give me call service and when I do rest it blinks 7 times .
All dip sitting are off
I want the humidifier to run when the heat is on only
I hooked up wire R from the humidfier to TR on the furnace
I hooked up wire C from the humidfier to TH on the furnace
I hooked up two wire running from the truesteam (hum) to the humidstat

The furnace has TIME DELAY VALVE (V810A1012)
And this delay has TR +TH and TR

The furnace is lennox model G8 -120-1

Any help
Thank you

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Check the furnace control board for accessory control terminal(s). Usually a designation of "H" or "HUM" indicates a provision for humidifier control. Assure it provides the correct voltage for your humidifier (if present). If no accessory terminals are present, you can install an Aprilaire AP-50 relay, wired in series with your current arrangement ("R" circuit) and clamped to the heating-speed blower motor lead wire. This will limit humidifier operation to heating cycles only.