Cover or shelter the water heater when it is not in use for extended periods of time.
SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
GENERAL. While it is not possible to prepare for all unusual conditions the water heater will be
exposed to, the following information should be helpful during unusual climatic conditions or nuclear, biological
and chemical contamination.
Operation in cold weather.
(1) Fill water heater fuel drum after operation to prevent formation and collection of moisture.
(2) Check for frozen or ruptured pipes, joints, connections and hoses immediately after starting
up the heater.
(3) Take precautions to prevent water hose assemblies, water pump, and water heater from
(4) After operation in freezing weather, the water heater must be drained. Drain cocks must be
left open the drain plug removed. Drain water from all hoses. Disassemble if necessary.
Operation in dusty conditions.
(1) Keep all fuel containers covered tightly to prevent dust from contaminating fuel. Protect
water heater and water pump from dust by enclosing units in a tent or by setting up a windbreak.
(2) During operation, inspect burner electrodes through sight tube glass for proper spark. If spark
moves up and down on electrodes instead of firing at electrode gap, notify unit maintenance.
If shelter is used during operation of the heater, ensure exhaust fumes are properly vented. Exhaust fumes are
poisonous and may cause severe injury or death.