Spa not getting to temp? Could be a dirty filter. Could be a high limit switch or other component.
go to their website and support and download it
Try this link www.jandy.com Ken
Most likely one or two of the burner orifices near the pilot light are clogged making the gas travel a distance before lighting. Pull the burner tray and clean it completely. And check for spider webs and other debris in the burners. Check for other gas leaks, and don't use flex lines, flanges, valves, or other fittings inside the heater. On the Series One, check the sidewalls to make sure they are intact.
There is no set size. The size depends on how many Btu of heat is needed for the burner in the appliance , heater or machine you are running .
sit on it then throw it into a creepy cave
You might want to try Jandy.com k
Try using the link Jandy.com or Jandy and search from there for manuals for your particular heater model. K
A limit switch is a switch that will shut off a burner at the highest temp that is allowed. Example:If the limit is set at 200 degrees, the inside of your heater will heat up to that temp, then the burner will shut off. The blower motor or circulator pump will move the air or water around your house. When the inside of your heater cools down anywhere from 15-25 degrees, the burner will come back on & the cycle repeats itself over & over until the thermostat is satisfied.
You can find every part you need for your boiler at gasboilerspareparts.com
Try google Jandy.com
Mine is 18 years old, still works
The laboratory heater is a Bunsen burner.