| Fuel Type: | Natural Gas |
|---|---|
| Inlet Size: | 3/4" |
| Outlet Size: | 3/4" |
| Capacity (BTU): | 280000 |
| Voltage: | 24V |

No. I had the same issue and went to the plumbing store to reduce it.
We are unable to reference that model number. You can access White-Rodgers' cross-reference database at the link below. http://www.emersonclimate.com/en-US/brands/white_rodgers/Pages/wholesaler_info.aspx
It is is the updated version of 36C84-423, with the difference being that 36C84-923 has an on/off switch rather than a knob.
Yes, the 923 is the correct replacement valve.