THOR MOTOR COACH
PROPANE GAS SYSTEMS
75
PROPANE GAS SYSTEMS
PROPANE GAS IS HIGHLY VOLATILE AND EXTREMELY EXPLOSIVE. DO NOT USE
MATCHES OR A FLAME TO TEST FOR LEAKS. USE ONLY APPROVED PROPANE
GAS LEAK TESTING SOLUTIONS FOR LEAK DETECTION. Unapproved solutions
can damage copper tubing and brass fittings. Never attempt to adjust propane
gas regulators. Only qualified personnel should perform any maintenance or
repair to the propane gas system.
The propane gas system furnishes the fuel for cooking, heating, and hot water. Propane gas can also be used
as an alternate energy source for refrigeration. Propane is a clean, efficient, safe form of energy when proper
handling and safety precautions are observed.
The Propane Gas system is designed to accept either Propane or Butane. However, since Butane vaporizes
at about 32°F, it can only be used in areas where you can be sure of higher temperatures. Propane vaporizes
at approximately -40°F. There are blends of Propane and Butane available, which will vary in the temperature
at which it vaporizes. When filling the tank, select a Propane Gas that has a boiling point about 40° lower than
temperatures you expect to travel in. Consult with your dealer, or local Propane Gas supplier about what you
should be using.
PROPANE GAS TANK
The gas is stored under extreme pressure in the tank, with space in the tank to allow for expansion into vapor.
This vapor is reduced in pressure by passing through a regulator. This reduction in pressure is a two step
process which assures consistent pressure for use, regardless of outside temperatures, weather, or altitude.
Note: For detailed information regarding propane gas and it’s use, consult a qualified
propane service representative.
Filling the Tank
MAKE SURE THAT THE TANK IS NOT FILLED BEYOND THE 80% LIQUID
LEVEL. Even though the tank is equipped with an automatic 80% shut-off which
prevents over-filling beyond 80% tank capacity, it is a good idea to have the
supplier monitor the 20% liquid gauge, and stop the filling process if liquid does
appear. If the tank has been over-filled, make sure the propane supplier bleeds
out the excess. Over-filling the propane gas container does not allow for the
necessary 20% vapor expansion space and may result in an uncontrolled gas
flow which can cause a fire or explosion.
Note: Make sure the tank service valve is accessible at all times. In an emergency, it may
be necessary to shut off the valve quickly.
1. Before entering the propane bulk plant or service station, make sure all pilot lights are
extinguished. Shut off gas to all appliances by first turning off each appliance, then close the
propane gas main shut-off valve.
2. Extinguish open flames and smoking materials.
3. Never remove the propane gas tank from the motor home. Always drive the motor home to the
gas supplier to fill.
4. Have the supplier connect the fill nozzle to the tank fill connection.
5. Always remember to close the supply valve and open the 20% liquid level valve.
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