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Heating & Air Conditioning
hvac1000

21V51U-843 Furnace Controller

hvac1000
12 years ago

I down loaded the instructions for the subject controller off the web. I have three questions for anyone that is familar with the controller.

1. What does it mean when they say "No Signal", "Positive Half Wave", "Negative Half Wave,and "Full Wave" when thay are discussing switch settings for motor optimization??

2. What does it mean when they associate S4-1 & S4-2 with "Delay" ??

3. What does it mean when they associate S3-3 & S3-4 with "Adjust" ??

Thanks in advance

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