Emergency Shut Down - American Water Heater Ultra Low Nox Installation Instructions Manual

Gas water heater with the flame guard safety system

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Table Of Contents

Table of Contents

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Checking the Draft

Do not touch vent.

Doing so can result in burns.

After successfully lighting the water heater, allow the unit

to operate for 15 minutes and check the drafthood relief

opening for proper draft. Make sure all other appliances

in the area are operating and all doors are closed when

performing the draft

test. Pass a match

Figure 17

flame around the

relief opening of the

drafthood. A steady

flame drawn into the

opening indicates

proper draft. If

the flame flutters

or is blown out,

combustion products

are escaping from

the relief opening. If this occurs, do not operate the water

heater until proper adjustments or repairs are made to the

vent pipe system and/or air supply requirements.

WARNING

Burn Hazard

Drafthood

Match

Burner Flames

Inspect the burner flames through the viewport. Flames

should be very small with a blue haze and small amounts

of yellow or orange at the edges. After several minutes

of operation, the burner screen may glow red. If large

flames are observed at any time, shut-off unit and call a

qualified person.

Figure 18

Flame Characteristics

Relief

Opening

Water Temperature Stacking

Stacking occurs when a series of short draws of hot water

(3 gallons or less) are taken from the water heater tank.

This causes increased cycling of the burner and can result

in increased water temperatures at the hot water outlet.

This water heater's temperature control has been designed

to accurately regulate the water temperature. However,

under certain operating conditions, the water temperature

may temporarily exceed the dial setting. Consequently, in

addition to setting the temperature no higher than 120°F,

we recommend the installation of a mixing valve or an

anti-scald device in the hot water supply line or at the point

of use to further reduce the risk of scald injury. These

devices can be obtained from a plumbing service agency or

your retail supplier.