|
central mich |
The carb or mixer does the fuel air ratio. We used to think that the Impco was simply an additional safety and have even removed them from the system but we would recommend that they be installed.
I just gave a 20kw to one of our employees. That unit had the Impco 55 mixer which has no diaphragm. With the Impco
52 removed it would load close to 20kw but it would not start with the auto start after three attempts it would fault out.
with excessive fuel.
And that was with 7" WC. With the Impco 52 in place it would only load about 10kw. So I gave him a new Maxitrol or Impco demand regulator and now it runs perfect, i.e it starts up fine and loads to about 19kw. So it is important to have the negative pressure on start up and that is recommended on all propane units on vapor.
The demand units seem simple but this unit was not working correctly.
Propane on vapor should be 1.5 " WC neg at the mixer or carb. | |
|
Propane generator running rich??
