Tiffin Motorhomes 2014 Allegro, Owner'S Manual

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TIFFIN MOTORHOMES –ALLEGRO® Chapter 3 HEATING & AIR CONDITIONING
3-2
Warning
Never attempt to modify the furnace. To do so may cause fire,
explosion, carbon monoxide poisoning, and/or asphyxiation. If the furnace
is malfunctioning, immediately shut the unit “off” and call a trained
service technician to make necessary repairs as soon as possible.
The Allegro motor home is equipped with a forced-air furnace fueled by LP gas. The furnace is controlled by the wall-
mounted thermostat (Figure 3-1) located inside the motor home—this thermostat controls both the heating and air
conditioning for the motor home.
In the heating mode, the furnace heats air which, in turn, is circulated through
ductwork in the floor of the motor home. If any obstruction(s) block the floor vent(s) or
air-return register, then the furnace will not function properly. Therefore, any items
stored under the cabinets should be carefully stowed to prevent damaging or crushing
the furnace ducting or blocking the warm-air return.
When a furnace is being used for the first time, there may be an initial “burn-off” of
manufacturing compounds or residues left on the heat exchanger or in the ductwork
which could produce odors, fumes, and possibly some smoke. This occurrence
is normal and should not cause concern, unless it persists for an excessive
amount of time.
To minimize the after-effects of this “burn-off” process, the initial use of the furnace should be done with all the doors
and windows open to permit normal air circulation to dissipate these possible odors and fumes. For routine operation
of the furnace, set the thermostat to the desired temperature setting and then turn “on” the thermostat; in about a
minute, the furnace should begin to operate and warm or hot air should be coming through the ductwork.
To shut down the furnace, turn the thermostat to the “off” position. Even though the thermostat may be turned “off,”
the furnace system will continue to run for about a minute or so to permit a gradual cool-down of the heating system
which is normal.
On a regular basis, thoroughly clean the complete furnace and air-tube passageways to remove dust, lint, and any
other possible obstructions. Leak-test the entire LP gas system at least semi-annually. Also check and clean the air-
blower system annually.
Any access hatches to the furnace are for authorized service personnel only, as there are no user serviceable parts on
the furnace. Accordingly, do not attempt to tamper with the interior of the furnace.
Figure 3-1. Thermostat
Furnace