Try here. Pages 8 to 11 may help.
I was looking for a pilot flame adjustment. Seems the real old ones had one but they later eliminated that.
You may have to make a U tube manometer to test if the main LP tank regulator is holding at 11" WC. The main tank regulator being a little low then the pilot may not stay lit.
They also have instructions about adjusting to make sure the pilot flame totally engulfs the thermocouple so the thermocouple warm up enough to send the right voltage back to keep the pilot lit.
Since the system lights and the main burner runs, that is a good sign. If the pilot flame is totally engulfing the end of the thermocouple, then that sort of points to a weak thermocouple.
Hope this helps and good luck.
If you are not comfortable in making any of these adjustments yourself if you have a gas repair man he can help. These heaters work very simailr to the older home gas hot water heater Or an RV dealer.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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