Battery Vent - Tiffin Motorhomes VANLEIGH BEACON Owner's Manual

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The RV battery which constitutes the 12-VDC system is contained in the front, outside com-
partment.
To access this battery, open the front, outside compartment door and remove the sealed
battery cover. When access to the battery is no longer needed, reinstall and securely fasten
the battery cover and shut the compartment door.

BATTERY VENT

Use of the installed battery vent is required when using a non-sealed lead acid battery.
DANGER
cC
non sealed lead aCid baTTerY off gas is
dangerous if noT ProPerlY VenTed
Dry camping
Consider the charge condition of the auxiliary battery when dry camping. If the auxiliary
battery is not being re-charged and power is being drawn, it will eventually discharge. A
battery will discharge at a faster rate as its energy level becomes depleted. It is recom-
mended you plan your electrical usage accordingly.
For accuracy, test the auxiliary battery voltage using a volt-ohm meter. A fully charged auxil-
iary battery will read 12.7 volts DC and 1.265 specific gravity at 80°F (32°C).
The battery is considered discharged at 11.8 volts, and dead at 11.65 volts. When voltage
drops below those levels, permanent damage may occur. Typically, a deep cycle battery has
an amp-hour rating of 75-100 amps.
If the furnace and refrigerator are operating simultaneously, approximately (12.0 + 3.0) 15.0
amps are used. This does not include any 12V lights, water pump or any other 12V compo-
nent.
In the above example, if the furnace and refrigerator operated constantly, a 75 amp-hour
battery would become fully discharged in 5 hours (75ah/15a=5h).
The auxiliary battery should be installed in parallel with the battery in your tow vehicle.
When the 7-way trailer plug is connected, both batteries power the RV so it is important
not to discharge your tow vehicle battery below the level required to start the engine. To
prevent this from occurring, disconnect the 7-way trailer plug or install a battery isolator.
When the tow vehicle engine is operating with the RV connected, the tow vehicle charging
system will charge both batteries.
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