Tiffin Motorhomes 2014 Allegro Bus, Owner'S Manual

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TIFFIN MOTORHOMES –ALLEGRO BUS® Chapter 3 HEATING & AIR CONDITIONING
3-5
Air Conditioning System
The factory-installed air-conditioning system is designed for 120 VAC power supplied either from the external power
hookup cord or from the generator. Any unnecessary interior heat loading (e.g., exposure to direct sunlight for long
periods of time; transmittance of sunlight through the windows) will work the air conditioning system harder and may
compromise the desired results. Accordingly, if the air conditioning system is to be used, park the motor home in a
shady location whenever possible and close drapes on those windows exposed to direct sunlight. Additionally, any
heat-producing sources (e.g., oven, unnecessary lights) within the motor home will work against the air conditioning
system; so strive to minimize their use.
The air conditioning system is the major consumption device of electrical power in the motor home. When this system
is being used in an RV park, cumulative use of these air-conditioning systems by the resident motor homes can create,
at times, a bigger demand for electrical power than is actually available. Accordingly, at such times a “brown-out”
condition may arise—this is when the AC voltage normally available drops to a lesser value (e.g., 10-20% below normal
or more).
“Brown-out” conditions cause appliances to draw greater currents to make up for the reduced voltage; thereby causing
circuit breakers to trip or fuses to blow. Under such conditions, your own motor home is not at fault; simply reset your
breakers and/or replace your fuses. Should such conditions continue, one may wish to turn reduce the electrical load (in
this case, turn “off” the air conditioning system for awhile) or start the electrical generator.
To cool the motor home, the thermostat inside the Allegro Bus is used—this is the
same thermostat which controls the furnace functions (described earlier). The air-
conditioned, cooled air is emitted through the vents which are located in the roof
throughout the entire coach. The discharge and return air vents run parallel, front to
back, on the ceiling. Note that the return vents are similar to the air conditioning
vents. This system allows even distribution for the returns instead of forcing an excess
amount of return air through two smaller openings. The even return system takes
more of the hot air from the motor home, thereby providing cooler air throughout the
unit. The air conditioning vents that are mounted on the ceiling are round vent filters
(Figure 3-5) that need to be periodically checked for dust accumulation. When
dust has accumulated on the filters, remove them and wash in a mild detergent
and warm water.
Thermostatic Controls
The following is a brief overview of how best to use the thermostat (Figure 3-6).
For more detailed instructions, please consult the thermostat literature in the Owner’s
Information Package.
1. Move power switch to ON.
2. Depress the MODE button to select function. (COOL*, FURNACE, FAN ONLY, etc.)
Figure 3-6. Thermostat
Figure 3-5. Round Vent/Filter