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Tiffin Motorhomes Knowledge Base

04 LP Gas System

2023 Wayfarer: Chapter 4

Liquid Propane (LP) Tank

The Wayfarer is equipped with an ASME (American Society of Mechanical Engineers) approved LP tank (Figure 4-1) which is equipped with an automatic pressure regulator. This tank contains liquid petroleum fuel under high pressure.

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TRUMA WATER HEATER

If equipped with LP, you RV will have the Truma water heater. Please operators manual in your delivery package. See addition info on page 41 of this manual.

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A LP gas-distribution system distributes the gas to those appliances using such in the motorhome. The “heart” of this LP gas distribution system is the regulator and it should only be adjusted by a qualified service technician. Most of the problems encountered in lighting the pilots of these appliances are caused by regulator mis-adjustments.

The major component of the LP gas supply is a pipe which runs underneath the motorcoach floor. The various gas appliances are connected by a rubber supply line.

Should any of the secondary tubing develop a leak, do not attempt to splice any of the lines. Instead, have a qualified service technician run a new length of tubing to the appliance of concern and then have that line leak-tested before placing it in normal operation.

To remove, repair, or replace any gas-operated appliance, always close the main gas valve at the LP tank.

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LP Tank Filling Practices

Any LP gas tank associated with the motorcoach must never be filled to more than 80 percent of its total capacity. Filling should always be done only when the motorhome is levelled. If the motorcoach is not level, the tank might be overfilled (i.e., more than 80 percent of capacity) and, thus, subject the motorcoach to possible fire or explosion from resultant uncontrolled gas flows

LP Gas Regulator

As noted earlier, the LP gas regulator (Figure 4-2) is the “heart” of the LP gas distribution system. This regulator reduces and controls the pressure of the gas on the outlet end to provide a constant supply of gas at a constant pressure to the gas-operated appliances. The regulator has a vent to relieve excess pressure on the inlet side of the regulator, should excess pressure develop in the gas tank and connecting gas line to that regulator inlet. The vent would normally release the excess LP gas to the atmosphere until the over-pressurization condition is eliminated.

This vent should be regularly checked to assure that it is not clogged or obstructed. If that vent is blocked from normal operation, component or system failures may result. If periodic visual inspection indicates any sign of corrosion or degradation, contact a qualified service technician to repair the regulator as soon as possible; DO NOT operate the LP gas system with any faulty component in place.

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When assembling your LP quick connect line, rotate the shut off lever shown in the picture below. Next, pull back on the release (Circled). Insert quick connect line. After inserting, rotate shut off lever back in to lock position.

NOTE: When LP quick connect is not in use, to ensure you don’t have any leaks have the valve in the position shown in the picture below.

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ELWELL TIMBERLINE SYSTEM (OPTIONAL)

The Timberline touchscreen panel located inside your RV gives you full command of your interior climate with intuitive controls. It allows you to adjust how quickly you want the heat to distribute and whether you prefer to utilize your fuel source or electric only, along with many more options to regulate the heating to your liking. Please refer to the manufacture’s manual.

HOW THE SYSTEM WORKS

Timberline heat and hot water is generated by the Autoterm Binar D5, a powerful yet quiet diesel or gasoline heating unit made for the most adverse conditions. A heated glycol solution is circulated through the interior of the living space through quiet air handlers that provide soft, radiant heat. The glycol is also circulated through an instantaneous water heat exchanger, which produces instant hot water for showers and kitchen use.

By using the diesel or gasoline burner coupled with the 120V electric element support, Timberline provides efficient comfort whether dry camping or plugged into shore power.

When the RV is cold, the fans run on high until the interior temperature starts to reach its target. The fans then automatically slow down and remain on low levels, maintaining the comfort levels inside.

HOW TO USE THE SYSTEM

The best way to use the Timberline system is to enable the burner, the electrical element , and the hot water icon . The Timberline system will self manage, prioritizing the element if the coach is plugged in and only using the diesel/gas burner as needed. When its cold outside, set the thermostat to your desired temperature and the system will manage energy while maintaining the selected set point.

If you are utilizing multiple 120V appliances at the same time (Coffee maker, AC, etc) you can turn off the electric element to conserve amperage and the Timberline system will maintain hot water and heat via the diesel burner. If you want to conserve diesel you can choose only the electric element .

Note: The electric element is limited in energy and will not provide as much hot water or keep the coach warm in colder temperatures.

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