Tiffin Motorhomes Allegro Bus 2011, Owner'S Manual

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H E A T I N G & A I R C O N D I T I O N I N G
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 (Optional)
Depending on what model your Allegro Bus is, it may 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 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.
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. Hydraunic Heating System