Tiffin Motorhomes 2014 Phaeton, Owner'S Manual

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Hydro-Hot Heating System (Optional)
The 42LH Phaeton will offer an optional Hydro-Hot heating system (Figure 4-18)
that provides a continuous, on-demand supply of domestic hot water, as interior
zone heating where and when it is needed. Both heating features are
accomplished by a unique VDC-Powered Diesel-Fired Burner and a VAC-
Powered Electric Heating Element (120 VAC). These two heating sources
maintain the temperature of the Hydro-Hot’s solution of water and antifreeze.
To activate the optional Hydro-Hot heating system, the hydro-hot switch (labeled
“diesel burner switch”) located in the side cabinet above the driver’s seat must
be activated. By activating this switch, a supply of hot water as well as interior
heat can be provided. The heating feature will be controlled by the thermostat
mounted on the wall. It is operated off the furnace function of the thermostat to
provide interior heat. Hot water will be supplied instantaneously and
continuously at any time the diesel burner switch is activated.
If interior heat and hot water are demanded from the Hydro-Hot system at the
same time, hot water will simultaneously take precedence over interior heat;
therefore causing the interior heat to shut down and turn off until the water flow
is turned off from water sources.
Also featured in the Hydro-Hot system is an electrical burner switch. With this
switch activated and shore power available, it will supply a very limited amount
of hot water and some interior heat.
The surge tank (Figure 4-19), located in the basement, should be routinely
inspected to make sure the antifreeze fill line stays in the acceptable zone. If the
antifreeze becomes low, you must add the recommended antifreeze stated in
the Hydro-Hot’s owner’s manual. If antifreeze is totally depleted from the surge
tank, a switch will be released inside the
main Hydro-Hot tank disabling the system from operating. Antifreeze will then
have to be added to the tank to
reactivate the switch and allow the system to operate.
If batteries accidentally become discharged and the Hydro-Hot system is
activated, the system will automatically shut down before batteries are totally discharged. Once power is restored to
batteries, the system must be reset by depressing the reset button the control board (Figure 4-20).
For detailed instructions on operating the Hydro-Hot Heating system, refer to the specific owner’s manual
found in the Owner’s Information Package.
4-18
TIFFIN MOTORHOMES –PHAETON® Chapter 4 MAJOR APPLIANCES & ACCESSORIES
Figure 4-18. Hydraulic Heating System
Figure 4-19. Surge Tank
Figure 4-20. Control Panel