Tiffin Motorhomes 2014 Allegro Bus, Owner'S Manual

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TIFFIN MOTORHOMES –ALLEGRO BUS® 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 Bus 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