Oakville secondary burner not lighting

[Chuck Shuck]

I just purchased this Oakville series GDIX4… and converted it from natural gas to propane… I change the ports to 53 orfice and the stepper motor….
Pilot light works fine… Brand new gas insert ..
And I’m trying to figure out what is the problem… Everyone’s on service call and won’t be able to come to my place at least for a month and a half… Crazy looking for help or insight

 

[Chuck Shuck]

Example of gas not getting to location

 

[DAKSY]

Have you verified the Gas Pressure?

 

[Chuck Shuck]

Have you verified the Gas Pressure?

The gas pressure from the tank outside 120 gallon tank to gas insert is full… But from the mainline to the outlets, no… I do not have a device to do that… I believe it’s called a manometer

 

[Chuck Shuck]

The gas pressure from the tank outside 120 gallon tank to gas insert is full… But from the mainline to the outlets, no… I do not have a device to do that… I believe it’s called a manometer

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[Chuck Shuck]

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[Chuck Shuck]

View attachment 303203

Is there a test port that a manometer can fit onto

 

[DAKSY]

Kind of hard to pinpoint your issue without knowing if the pressure is adequate.
One more question... Why do the air shutters look like they are closed?
LP fuel generally requires more Air-to-Fuel (ATF) in the mixture, & that
is done by opening the air shutters.

 

[DAKSY]

Is there a test port that a manometer can fit onto

Yes & the input & output pressure ports are shown in the drawing with the red circle on it.

 

[Chuck Shuck]

Kind of hard to pinpoint your issue without knowing if the pressure is adequate.
One more question... Why do the air shutters look like they are closed?
LP fuel generally requires more Air-to-Fuel (ATF) in the mixture, & that
is done by opening the air shutters.

ATF…I micrometer the opening to the spec

 

[Chuck Shuck]

ATF…I micrometer the opening to the spec

View attachment 303204

Do I need a manometer to check the pressure?

ATF…I micrometer the opening to the spec

View attachment 303204

is there a way you can instruct me on how to check pressure of the In-N-Out port… There was that video and I just don’t know where to insert the manometer

 

[DAKSY]

Loosen the screw in the port. Slip the manometer tube over the outer diameter of the port. Read the manometer.

 

[Chuck Shuck]

Loosen the screw in the port. Slip the manometer tube over the outer diameter of the port. Read the manometer.

Does the inlet have to read 13” and the outlet have to read 10”…& do unscrew it out almost all the way out
Is there a test port that a manometer can fit onto….mono meter for inches or millibars?

 

[Chuck Shuck]

Would this manometer do

Digital Manometer Dual-Port HVAC Gas Air Pressure Meter Gauge Differential Pressure Manometer Large LCD with Backlight https://a.co/d/e36IbmQ

 

[DAKSY]

Manometer needs to read inches of Water Column (WC).
With the unit OFF.
Back off the INLET screw until you hear/smell gas.
Tap the inlet port.
Note the manometer reading
Remove the manometer & tighten the screw.
Turn the unit on.
Back off the OUTPUT screw.
Tap the outlet port.
Note the manometer reading.
Remove the manometer & tighten the screw.

 

[Chuck Shuck]

Manometer needs to read inches of Water Column (WC).
With the unit OFF.
Back off the INLET screw until you hear/smell gas.
Tap the inlet port.
Note the manometer reading
Remove the manometer & tighten the screw.
Turn the unit on.
Back off the OUTPUT screw.
Tap the outlet port.
Note the manometer reading.
Remove the manometer & tighten the screw.

 

[Chuck Shuck]

This manometer that I sent you…
will be adequate for what I’m doing?

 

[DAKSY]

That will work.

 

[Chuck Shuck]

That will work.

So let’s live in the scenario that it’s not in the parameter of 13 inches and 10 inches… What is that telling you and how can I resolve the issue?

 

[DAKSY]

If you don't have those readings, the regulator on the fuel tank may need to be looked at.

 

[Chuck Shuck]

If you don't have those readings, the regulator on the fuel tank may need to be looked at.

So after I get these readings, and they’re not in spec… I replaced the step motor from natural gas to propane and I replaced the diaphragm. Could’ve been operator error on how I put in the diaphragm of the step motor the brand new one?

 

[DAKSY]

Possibly, but i am not sure that's what is the issue with yours.
IIRC, these stepper motors are used in the regulation of the
gas flow for flame height adjustment, not secondary burner ignition.
There is a solenoid that actuates the second burner.
Sometimes they are bad from the factory, but sometimes they are simply
stuck. A sharp "rap" with the plastic handle of a screw driver on the valve
body can free up the solenoid.

 

[Chuck Shuck]

Possibly, but i am not sure that's what is the issue with yours.
IIRC, these stepper motors are used in the regulation of the
gas flow for flame height adjustment, not secondary burner ignition.
There is a solenoid that actuates the second burner.
Sometimes they are bad from the factory, but sometimes they are simply
stuck. A sharp "rap" with the plastic handle of a screw driver on the valve
body can free up the solenoid.

Update… got manometer… inlet was 14 water columns and the outlet was nine water columns went to the tank, turned up a little bit of the pressure from the tank got to 10 inches of water column… But it worked better after I put in the glass and hooked up the air venting, it started working efficiently… So I believe it was operator error.

 

[Chuck Shuck]

Manometer needs to read inches of Water Column (WC).
With the unit OFF.
Back off the INLET screw until you hear/smell gas.
Tap the inlet port.
Note the manometer reading
Remove the manometer & tighten the screw.
Turn the unit on.
Back off the OUTPUT screw.
Tap the outlet port.
Note the manometer reading.
Remove the manometer & tighten the screw.

I’m curious is these glow embers laid in properly above the front burner?

 

[DAKSY]

As long as they don’t impede any gas flow from the burner ports, you should be fine. Light er up with the glass on & let’s see what ya got!