jsatterfield34
New member
My burner coils are 1/2" i.d. What gpm can I go up to without it affecting my water temperature?
Are most burner coils 1/2" i.d?
Are most burner coils 1/2" i.d?
Burner Coil i.d. vs. GPM of pump
- Thread starter jsatterfield34
- Start date
Paul Kassander
New member
Most are 1/2". If you change your gpm higher at all the temp will drop unless you increase the size of the burner nozzle and air flow. If your current unit is set up for say 6 gpm you could probably run up to 8 gpm through and compensate with a larger burner assembly or bigger fuel nozzle with a minimal temp loss. Coil length will also have a lot to do with the temp rise as well.
jsatterfield34
New member
Paul Kassander
New member
Not sure of the exact nozzle size I don't have my reference charts handy but I would say a 2.25 or 2.5 fuel nozzle. You can also re-set the fuel pressure around 140-150 psi. plus you will need to readjust the air bands to make it run clean.
Sirocco Jerry
Active member
adjusting fuel pressures over 120 psi...
be carefull adjusting fuel pressures over 120 psi..
it changes the "shape" of the fire-ball..
"Too long" a fire-ball could hit the bottom of the heater coil,
allowing fuel mist to merge into droplets that won't burn right,
then you have fuel dripping from under your heater,
and "smoldering" when the main-flame goes off.
That's the white smoke, after you releaser the trigger-gun.
Having the air-bands open too far does the same thing.
1. Get a fuel mpressure guage ($14.95 with adapters)
2. Have a Tech adjust the fuel-pressure and air for you.. (about $25.)
give him an extra $20 for SHOWing you, and explaining the process..
3. Put a note on the calender to re-cherck it at least every200 hours..
especially if it's in a (bouncy) trailer, or the engine is rigid-mounted to the same frame.
Even a better idea..
Pay the Tech to show you how to also adjust your burner-electrodes,
..before adjusting the fuel and air..
Call it a major tune-up.
and with the training..
you'll be ready for some more serious troubleshooting when necessary.
Do 'yall print this stuff out, for future reference ??
..It IS that important.
and nobody's "user-manual" explaines these things. Eh?
be carefull adjusting fuel pressures over 120 psi..
it changes the "shape" of the fire-ball..
"Too long" a fire-ball could hit the bottom of the heater coil,
allowing fuel mist to merge into droplets that won't burn right,
then you have fuel dripping from under your heater,
and "smoldering" when the main-flame goes off.
That's the white smoke, after you releaser the trigger-gun.
Having the air-bands open too far does the same thing.
1. Get a fuel mpressure guage ($14.95 with adapters)
2. Have a Tech adjust the fuel-pressure and air for you.. (about $25.)
give him an extra $20 for SHOWing you, and explaining the process..
3. Put a note on the calender to re-cherck it at least every200 hours..
especially if it's in a (bouncy) trailer, or the engine is rigid-mounted to the same frame.
Even a better idea..
Pay the Tech to show you how to also adjust your burner-electrodes,
..before adjusting the fuel and air..
Call it a major tune-up.
and with the training..
you'll be ready for some more serious troubleshooting when necessary.
Do 'yall print this stuff out, for future reference ??
..It IS that important.
and nobody's "user-manual" explaines these things. Eh?
Last edited:
Sirocco Jerry
Active member
Joey,
If that is a "true 18" dia. heater..
you can use a 3.0 GPH (80 degr.) burner nozzle
at 100-110 psi.
and get SWEET-heat with 5.5gpm.
IF you go over 110psi, use a 90 degree burner nozzle,
and still don't go over 130psi
Side note..
you're going to loose pressure if you put a bigger-flow on the same HP engine.
CALL me with any questions.
If that is a "true 18" dia. heater..
you can use a 3.0 GPH (80 degr.) burner nozzle
at 100-110 psi.
and get SWEET-heat with 5.5gpm.
IF you go over 110psi, use a 90 degree burner nozzle,
and still don't go over 130psi
Side note..
you're going to loose pressure if you put a bigger-flow on the same HP engine.
CALL me with any questions.