Tiffin Motorhomes 2014 Allegro Bus, Owner'S Manual

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TIFFIN MOTORHOMES –ALLEGRO BUS® Chapter 3 HEATING & AIR CONDITIONING
3-3
Warning
Be cautious when washing the exterior of the motor home; water should never be
sprayed directly into the furnace vent. Should any water be forced beyond the rain
baffles into the furnace vent, the furnace may rust which, in turn, may cause
improper combustion and produce unwanted by-products of combustion.
Before the beginning of each travel season, the furnace should be thoroughly cleaned and inspected. Any obstructions,
debris, or lint which may obstruct free air flow or impede the operation of the air circulation system should be removed.
For example, accumulated dust or lint could possibly obstruct the orifices for the pilot light or may accumulate on the
blower blades and unbalance the operation of the blower. Additionally, any debris in the ductwork, when heated by
the furnace, could emit unpleasant odors or possibly become a fire hazard.
Consequently, the furnace system should be periodically cleaned; annually is recommended unless the motor home is
subjected to dust levels significantly greater than average; in which case more frequent cleaning is recommended.
The Owner’s Information Package provides recommended cleaning tips and procedures; when needed, a more
thorough cleaning should be performed by a qualified service technician.
Hydro-Hot Heating System
Your Allegro Bus will feature a Hydro-Hot heating system (Figure 3-2) that
provides a continuous, on-demand supply of domestic hot water, as well 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 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.
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.
Figure 3-2. Hydraulic Heating System