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TIFFIN MOTORHOMES
Pressure-Relief Valve
The relief valve for over-pressure and over-temperature conditions is located on the exterior of the water
heater. This valve will operate if the water temperature reaches or exceeds 210°F or if the water pressure
reaches or exceeds 150 psig. Since the water system in the motor home is a closed system when all water valves
are shut, the water-heating cycle can raise the temperature (and, consequently, the pressure) of the water in the
water heater; thereby realizing pressure increases approaching 150 psig. Should this pressure be reached, the
pressure-relief valve will begin "weeping," that is, minor dripping or leakage from that valve until the pressure
drops below 150 psig, at which time the pressure-relief valve will re-seat itself and restrict the water flow. This
is normal operation and should not be a cause for alarm. Do not obstruct or block the pressure-relief valve in
any way, as this would keep the valve from functioning normally and protecting the hot water system.
CB Radio System Antenna Connection
(Optional)
The Allegro may be equipped with an antenna and coaxial-cable connection (Figure 4-
14) to enable the owner to install a Citizens Band (CB) radio of choice and operate it
conveniently from the Allegro. The coaxial-cable connection for the radio is found
beneath the dashboard on the driver's side. Accordingly, with an owner-provided CB
radio, that radio can be used to communicate with other travelers on the road. To use
one's CB system of choice, simply follow the directions furnished with the CB radio.
(Note: Channel 11 is considered an emergency channel and monitoring this channel
may give one information about road conditions, accidents, and related matters
potentially affecting the travels of the motor-home operator).
To talk with someone, simply press the "push-to-talk" switch and speak. To listen to any reply, release the "push-to-
talk" switch and listen to the speaker. Remember that communications are "one-way," not "two-way" simultaneously—
one must talk, then allow some listening time for others to talk. Consequently, it's better to make brief transmissions
and allow others to comment; rather than making prolonged speeches and possibly not having anyone answer.
Observe the common courtesies (see the owner's manual for more details) and acceptable speech. Several states have
their Highway Patrols monitor the CB frequencies (check for exact channels for each state of interest) to learn about
highway problems and emergencies. Be aware of these throughout one's travels, in the event that they may be needed.
Figure 4-15. Triple Vision Camera Monitor
System
!!!
–ALLEGRO®
Triple Vision Camera Monitor System
The rear-view monitoring system (Figure 4-15) is provided to aid the driver in
backing and parking the motor home. A camera mounted on the rear of the
vehicle feeds a televised view of the rear of the motor home to the monitor
located in the front near the driver. If the mode switch is in the "manual"
mode, the monitor will be "on" when the ignition switch is turned "on." If the
mode switch is in the "automatic" mode, the monitor will display the picture
from the rear-mounted camera only when the transmission is in "reverse"
gear. To use this system effectively, please consult the owner's manual for this
system; this manual is in the Owner's Information Package.
Chapter 4
MAJOR APPLIANCES & ACCESSORIES
Figure 4-14. CB Antenna
Installation
4-11
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