We have a 1991 legend 35.5 with a CNG stove. We are very satisfied with the system. A local supplier in Montreal will fill 3 tanks to 2500 psi for around 10$ CAN, a real bargain! Our problem started this summer. When lighting any of the 2 top burner or the oven, the flow of gaz is no longer smooth and producing a continuous flame. The flame is pulsating from low to high once every second. We can still use the system but it seems to take longer to boil water as it is cycling between high-low-high-low etc. Some time the pulsation is so intense that it will extinguish the flame. We have a pressure gauge on our system and this happend anywhere between 2500 psi ( tank full) to 200 psi (nearly emty). We changed the tank to a another one with same results. Any adjustements or else I should check? There is no leak in the system anywhere. Any advice would be welcome.
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Air passageways
Claude, check the air passages between the gas jet and the burner assemblies to be sure some little 8 legged critter hasn't built a web in there. This is a common occurance with patio grills too.
Claude, check the air passages between the gas jet and the burner assemblies to be sure some little 8 legged critter hasn't built a web in there. This is a common occurance with patio grills too.
Cng
I am am surprised that you were able to find anyone who will fill CNG tanks.I brought my newly purchased Hunter 40 from Chicago in May and had toconvert mine a to propane. The old orifices acted very much like what you are describing. They produced a high pulsating flame. Are you sure your tank was not filled with propane? Since I have changed the orifices and thermostat, the stove works fine.
I am am surprised that you were able to find anyone who will fill CNG tanks.I brought my newly purchased Hunter 40 from Chicago in May and had toconvert mine a to propane. The old orifices acted very much like what you are describing. They produced a high pulsating flame. Are you sure your tank was not filled with propane? Since I have changed the orifices and thermostat, the stove works fine.
CNG and propane smells very different
If you are uncertain about what kind of fuel you actually purchased, just take a whiff. Propane has that distinct smell. Also I think CNG is a gas, not liquid. A filled CNG tank shouldn't weight anymore than a empty CNG tank. Not true for propane. I am curious about what you paid for it. $10 USD for 3 tanks? Or is it $10 USD each? Either way, that is way cheap for CNG. Well, CNG is cheap. It is the filling that costs a arm and a leg.
If you are uncertain about what kind of fuel you actually purchased, just take a whiff. Propane has that distinct smell. Also I think CNG is a gas, not liquid. A filled CNG tank shouldn't weight anymore than a empty CNG tank. Not true for propane. I am curious about what you paid for it. $10 USD for 3 tanks? Or is it $10 USD each? Either way, that is way cheap for CNG. Well, CNG is cheap. It is the filling that costs a arm and a leg.
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