Question on coolant heater

[Matt1970M35A]

I have a coolant heater that Im trying to get running.
Have not found any TM s on it so im in the dark.
I tried to run it to day. The blower is running and the fuel heater is glowing orange.
It puts out a gray smoke and the outer case will get very hot but the water is cold and the exhaust port will just begin to get the warm.
I took the burner/ fuel nozzle off to have a look inside. I did not see anything out of place.
I did bleed the air out of the fuel line and the bleeder port when I started.
Im using a pulse type pump with 8 psi. Heater shows 3 to 15 psi range.
Any Ideas? Model # 939J24

 

[gimpyrobb]

I D 10 T error!

What model number? I have some info on them.

 

[Matt1970M35A]

Model # 939J24

 

[Matt1970M35A]

I cleaned the fuel valve to day seem to be working better. Less gray smoke. Exhaust pipe get hot. But I dont think its coming out of start mode.