Tiffin Motorhomes Allegro Bus 2016 Owner's Manual page 30

Yearly maintenance is required on the burner portion of the
C AUTI O N
The Aqua-Hot heating system operates off
the coach's diesel tank. Keep in mind that
the Aqua-Hot fuel tube is located higher in
the diesel tank than the coach's engine fuel
in order to prevent complete depletion of the
diesel fuel tank. BE SURE AN ADEQUATE
AMOUNT OF FUEL IS IN THE TANK BEFORE
DRY CAMPING.
HEATING & AIR CONDITIONING
NOT ICE
Aqua-Hot heating system.
DO NOT operate the diesel burner and/or the
electric heating element without the water
and anti-freeze solution in the Aqua-Hot's
boiler tank. Failure to do so will cause SERI-
OUS DAMAGE to the heater.
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C AU TIO N