American Water Heater Power Flex 40-42K BTU - Manual (Page 16)

16
Water temperature over 125°F can cause
severe burns instantly or death from scalds.
Children, disabled and elderly are at highest
risk of being scalded.
Feel water before bathing or showering.
Temperature limiting valves are available.
WARNING
L.P.G. (Bottled Propane) Models
Liquefi ed petroleum gas is over 50% heavier than air
and in the occurrence of a leak in the system, the gas
will settle at fl oor level. Basements, crawl spaces, skirted
areas under mobile homes (even when ventilated), closets
and areas below ground level will serve as pockets for
the accumulation of gas. Before lighting an L.P. gas water
heater, smell all around the appliance at fl oor level. If you
smell gas, follow the instructions as given in the warning on
the front page.
When your L.P. tank runs out of fuel, turn off the gas at
all gas appliances including pilot lights. After the tank is
refi lled, all appliances must be re-lit according to their
manufacturer’s instructions.
Water Heater Operation
Figure 11 below shows the water heater’s sequence of
operation when a call for heat is initiated. The ignition
control module will attempt to light the burner three times.
If the ignition control does not detect ignition it will enter
lock-out mode, indicated by a three flash error code.
Burner Flames
Inspect the burner flames through the viewport and com-
pare them to the drawings in Figure 16. A properly operat-
ing 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
person if the flame is not satisfactory.
Water Temperature Regulation
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 infi rm, or physically/mentally handicapped. If
anyone using hot water in your home fi ts 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 satisfi es 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 9. Follow manufacturer’s instructions for installation of
the valves. Before changing the factory setting on the thermostat
see Figure 13 and the table below. Using the lowest hot water
temperature that meets your needs will also provide the most
energy effi cient 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 (49°C-60°C)
is recommended by most dishwasher manufacturers.
The thermostat of this water heater has been factory set at its
lowest position, to reduce the risk of scald injury. It is adjustable
and must be reset to the desired temperature setting.
The mark ( ) (on temperature setting of gas control valve/
thermostat) indicative of approximately 120°F is preferred
starting point. Some states have a requirement for a lower
setting. If you need hotter water, follow directions for
temperature adjustment, but beware of the warnings in this
section.
Pressing the “COOLER” button decreases temperature and
pressing the “HOTTER” button increases the temperature.
To avoid any unintentional changes in water temperature
settings, the control has a tamper resistant feature
for changing the temperature setting. To change the
temperature setting follow these instructions:
1. “Wake Up” the temperature indicators by holding down
both “COOLER” and “HOTTER” temperature adjust-
ment buttons at the same time for one second (See
Figure 13). One or two of the temperature indicators
will light up. These indicators will only remain on for
Temperature
Settings
Time to Produce 2nd & 3rd
Degree Burns on Adult Skin
160°F (71°C) About 1/2 second
150°F (66°C) About 1-1/2 seconds
140°F (60°C) Less than 5 seconds
130°F (54°C) About 30 seconds
120°F (49°C) More than 5 minutes
80°F (27°C) - - - - - - - - - - - - - - - -
Figure 11
Sequence of Operation
CALL FOR
HEAT INDICATED
BY FAST FLASH
OF LED
CONTROL CHECKS TO ENSURE
PRESSURE SWITCH IS OPEN
DRAFT INDUCER IS ENERGIZED
CONTROL ENERGIZES HOT
SURFACE IGNITER (HSI)
CONTROL ENERGIZES MAIN
GAS VALVE ALLOWING THE
BURNER TO BE LIT BY HSI
WATER IN TANK IS HEATED BY
MAIN BURNER AND
TEMPERATURE REACHES
THERMOSTAT SETTING
FLAME SENSE ROD DETECTS
FLAME OF MAIN BURNER
MAIN VALVE DE-ENERGIZES
AND BLOWER CONTINUES FOR
A POST PURGE TIME OF
APPROX. 30 SECONDS
MAIN VALVE DE-ENERGIZES
AND BLOWER CONTINUES FOR
A POST PURGE TIME OF
APPROX. 5 SECONDS
HEATER RETURNS TO
STANDBY MODE
CONTROL CHECKS TO ENSURE
PRESSURE SWITCH CLOSES,
INDICATING BLOWER OPERATING
AND THERE ARE NO VENTING
BLOCKAGES (INLET OR OUTLET)
Figure 12
Flame Characteristics
Tips may have
a yellow tint
Yellow inner
cones are
satisfactory Correct flame
soft blue