Tiffin Motorhomes 2014 Phaeton, Owner'S Manual

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TIFFIN MOTORHOMES –PHAETON® Chapter 4 MAJOR APPLIANCES & ACCESSORIES
Heater ignites but water temperature is too low.
> Check thermostat setting.
> The water flow may be so high as to exceed the capacity of the heater particularly if your supply water is very
cold. Slow the water flow.
> The heater may be subjected to excessively strong winds, cutting the efficiency. Shield from wind or change the
location of the unit.
> The gas pressure may be too low. Check the regulator pressure. The LPG pressure should be 11 water
column inches, (WCI) while the heater is running. A gas-testing gauge should be installed on the manifold tap
so that it may be read while heater is running. If it is too low, turn up the gas regulator to the proper pressure.
Be sure the gas flow control valve is in full “on” position. This should only be done by a qualified technician.
> The gas flow may be too low due to improper gas line diameter (under 3/8” outside diameter). The gas line
may be excessively long (over 20-30 feet) or the on/off solenoid at the tank (if you have one) may have an orifice
that is too small (under 3/16” of an inch).
> Check the heater for an airflow obstruction and clean.
> Check the two conductors, black and white to the modulating valve. It should be securely plugged in to
the control board terminal.
Water temperature is too hot or no temperature control.
> The thermostat is set too high.
> Fuel tank regulator is set too high. Have the regulator checked by a qualified technician.
> Be sure that the hot and cold water lines are not reversed on the heater hook-ups. The unit will not function
properly and water could become extremely hot.
> If water temperature reaches 165ºF, the high temperature limit switch (ECO) will trip, shutting the heater down.
Locate the high temperature switch (two light blue wires) at the upper right hand of the heat exchanger. Push
the reset button in the center of the switch. (Early models only. Newer models have an auto reset ECO).
Low heat rise. Excessive water flow is required to trigger water heater.
> If you find that your heater requires excessive flow to activate it (over ó gallon per minute), it is likely that you
have cold water bleeding into the hot water side of your water system. Check that valves and faucets are closed
when not in use. If there is an on/off button on your showerhead, always turn the water valves off after the
shower to prevent cold water from bleeding into the hot water system. This will keep the heater from
functioning properly.
If any problems persist, contact an authorized service center or the manufacturer.
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