John Wood Atmospheric Gas (ENERGY STAR) - NEW - Manuel (Page 19)

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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 (49°C), 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.
Emergency Shut Down
IMPORTANT: Should overheating occur or the gas supply
fails to shut off, turn off the water heater’s manual gas
control valve and call a qualified technician.
Water Temperature Regulation
Water temperature over 125°F (52°C)
can cause servere burns instantly
resulting in severe injury or death.
Children, the elderly, and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting valves are
available.
Read instruction manual for safe
temperature setting.
Due to the nature of the typical gas water heater, the water
temperature in certain situations may vary up to 30°F (16.7
°C) higher or lower at the point of use such as, bathtubs,
showers, sink, etc.
HOTTER WATER CAN SCALD: Water heaters are intended
to produce hot water. Water heated to a temperature which
will satisfy space heating, clothes washing, dish washing,
and other sanitizing needs can scald and permanently
injure you upon contact. Some people are more likely to
be permanently injured by hot water than others. These
include the elderly, children, the infirm, or physically/
mentally handicapped. If anyone using hot water in your
home fits into one of these groups or if there is a local code
or state law requiring a certain temperature water at the
hot water tap, then you must take special precautions. In
addition to using the lowest possible temperature setting
that satisfies your hot water needs, a means such as a
mixing valve should be used at the hot water taps used
by these people or at the water heater. Mixing valves are
available at plumbing supply or hardware stores. See
Figure 14. Follow manufacturer’s instructions for installation
of the valves. Before changing the factory setting on the
thermostat, see Figure 19. Using the lowest hot water
temperature that meets your needs will also provide the
most energy efficient operation of the water heater.
Never allow small children to use a hot water tap, or
to draw their own bath water. Never leave a child or
handicapped person unattended in a bathtub or shower.
NOTE: A water temperature range of 120°F-140°F
Checking the Draft
WARNING
Burn Hazard
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 draft hood relief
opening for proper draft (Figure 17). Make sure all other
appliances in the area are operating and all doors are
closed when performing the draft test. Pass a match flame
around the relief opening of the draft hood. A steady flame
drawn into the opening indicates proper draft.
Match
Relief
Opening
Draft Hood
Vent
Pipe
FIGURE 17.
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.
Burner Flames
Inspect the burner flames through the viewport and
compare them to the drawings in Figure 18. A properly
operating burner should produce a soft blue flame. Blue
tips with yellow inner cones are satisfactory. The tips
of the flame may have a slight yellow tint. The flame
should not be all yellow or have a sharp blue-orange
color. Contaminated air may cause an orange colored
flame. Contact a qualified technician if the flame is not
satisfactory.
FIGURE 18.
Water Heater Stacking
Stacking occurs when a series of short draws of hot water (3
gallons [11.36 litres] 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.