Start Up; Prior To Start Up - American Water Heater 300 Series Instruction Manual

PRIOR TO START UP

Installation and start up of this water heater requires abilities and skills
equivalent to that of a licensed tradesman in the field involved, see
Qualifications on page 7.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN EXPOSED
TO FLOODING OR WATER DAMAGE. Immediately call a qualified
service agency to inspect the appliance and to make a determination
on what steps should be taken next. If the unit is exposed to the
following, do not operate heater until all corrective steps have been
External fire
1. Damage
2. Firing without water
Light the water heater in accordance with the Lighting and Operation
Instruction label on the water heater and in this manual Lighting the
Water Heater on page 51.
The water heaters covered by this manual are equipped with an
electronic control system, which automatically sequences the
Combustion Blower, pre and post purging of the combustion chamber,
the spark transformer, the 24-volt gas valve, Main Burner ignition, and
flame sensing. The control system will lock out after three unsuccessful
ignition attempts. See Control System Operation on page 41.
START-UP PREPARATION
Before attempting start up, thoroughly study and familiarize yourself
with the exact Sequence Of Operation (page 56). Ensure the water
heater is properly grounded. Flame sensing requires an adequate
earth ground. If the water heater is not properly grounded it will cause
ignition failure.
Be certain that the water heater is full of water, that air is purged from
the gas and water lines and that there are no leaks in the gas and
water lines. Ensure all inlet water valves are open.

START UP

FILLING THE WATER HEATER
Never use this water heater unless it is completely full of water.
To prevent damage to the tank, the tank must be filled with water.
Water must flow from the hot water faucet before turning ON gas to
the water heater.
To fill the water heater with water:
1. Close the water heater drain valve by turning the handle to the
right (clockwise). The drain valve is on the lower front of the
water heater.
2. Open the cold water supply valve to the water heater.
NOTE: The cold water supply valve must be left open when the
water heater is in use.
3. To insure complete filling of the tank, allow air to exit by opening the
nearest hot water faucet. Allow water to run until a constant flow
is obtained. This will let air out of the water heater and the piping.
4. Check all water piping and connections for leaks. Repair as needed.
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