Tiffin Motorhomes 2014 Allegro Bus Owner'S Manual Download

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TIFFIN MOTORHOMES

–ALLEGRO BUS®

Chapter 3

HEATING & AIR CONDITIONING

3-6

3.  Depress the FAN button to select fan speed or automatic operation.
4.  Depress the UP or DOWN button to set your desired temperature for the zone.
5.  If your vehicle contains more than one ZONE, depress the ZONE button to select Zone 2, and repeat procedures

from Step 2 above. Repeat procedure for each additional zone.

6. If your vehicle has two roof top air conditioners utilizing a 50 amp power cord, some restrictions may apply.

When only 30 amps are available, you most likely will have to turn off one of the two

air conditioners to prevent tripping the circuit breaker. Refer to Step 5, then Step 2, for shutting
off the air conditioner in your selected zone.

NOTE: There is an approximate 2-minute time delay after selecting cooling function for refrigerant
compressor to start.

NOTE: If the Comfort Control is turned “off” or the thermostat loses power (i.e., power failure), the
air-conditioning system will resume operation at the last settings programmed into it when electrical
power is restored.

Liquid Propane (LP) Tank

The Allegro Bus is equipped with an ASME (American Society of Mechanical Engineers)-approved LP tank (Figure 3-7)
which is equipped with an automatic pressure regulator. This tank contains liquid propane fuel under high pressure. As

this fuel passes through the main valve and through the regulator, it is converted into
a gas and its pressure is reduced to a safe level for use within the motor home. A LP
gas-distribution system distributes the gas to those appliances using such in the motor
home. The “heart” of this LP gas distribution system is the regulator and that
regulator should only be adjusted by a qualified service technician. Most of the
problems encountered in lighting the pilots of these appliances are caused by
regulator misadjustments.

The major component of the LP gas supply is a manifold pipe which runs lengthwise
underneath the motor home floor. From this manifold, the various gas appliances are
connected by copper tubing with flared fittings so that connections and

disconnections can readily be made, as needed. Should any of the secondary tubing develop a leak, either on the
tubing proper or at the fittings, do not attempt to splice any of these lines. Instead, have a qualified service technician
run a new length of tubing to the appliance of concern and then have that line leak-tested before placing it in normal
operation.

To remove, repair, or replace any gas-operated appliance; always close the main gas valve at the LP tank—this measure
will provide an additional element of safety to prevent gas leakage and possible, subsequent explosion hazards.
However, if a gas leak is noted or suspected, turn “off” the main valve and keep the LP gas system “off” until that
system is inspected by a qualified service technician as soon as possible.

Do not delay in addressing any possible gas leaks with appropriate service because of the inherent hazards
to safety.

Figure 3-7. Liquid Propane Tank