Service manual

150158 Rev. 2 August - 2010
16
HI-TEMPERATURE LIMIT
The thermostat on this water heater is equipped with a high
temperature limit switch (ECO). The ECO will shut off the
gas supply to the burner and pilot in the event the water
temperature exceeds 190 degrees F. Main burner operation
can be reset by pressing the reset button on the ECO after the
water temperature has returned to normal (see Fig. 12).
WATER TEMPERATURE REGULATION
The temperature of the water in the heater can be regulated by
the setting of the temperature dial on the thermostat. To adjust
the temperature setting, remove cover and rotate dial to
desired temperature setting (see Fig. 12)
DANGER
TEMPERATURE CONTROL
FIGURE 12
GAS PRESSURE
With the water heater in operation (main burner on), the
maximum supply pressure must not exceed the specified value
below, and the minimum supply and normal manifold gas
pressures are as follows:
Supply Pressure Manifold Pressure
MAX. MIN. NORMAL
Natural Gas:
10.5” W.C. 5” W.C. 4” W.C.
(see rating plate)
L.P. Gas: 13.0” W.C. 11” W.C. 10” W.C.
Refer to pressure noted on the label affixed to the front of the
water heater. Consult your local gas company of gas supplier
if correction is necessary.
EMERGENCY SHUTDOWN
INSTRUCTIONS
Should the water heater be subjected to flood, fire, or other
unusual condition, turn off gas at manual shut-off valve and
water inlet valve to heater. Refer to Figure 5. Do not place
water heater in operation again until it has been thoroughly
checked by qualified personnel.
TAMPERING
Tampering with the thermostat, gas valve, igniter control, or
temperature and pressure relief valve is DANGEROUS and
voids all warranties. Only qualified personnel should service
these components.
WARNING
MAINTENANCE
BURNER AND PILOT MAINTENANCE
At least every 3 months, visually check main burner and pilot
flames and compare with the sketch below. Observation of the
gas flame should show the burner flame to be a soft blue with
the suggestion of slight yellow tips. It is to be noted that the
flame of a light color may not be a carbonizing flame.
Carbonizing flames are to be avoided and can be determined
by wiping the tip of the combustion chamber when the flames
is extinguished and the combustion chamber has cooled to
determine if any carbon or soot has been deposited. If the
burners are dirty or clogged with lint or soot, the burners can
be cleaned with soap and water. If sooting re-occurs, refer to
Common Complaints, Page 16.
At least every 3 months a visual inspection should be made of
the venting system. You should look for:
• Obstructions which could cause improper venting.
• Damage or deterioration which could cause improper
venting or leakage of combustion products.
PILOT AND MAIN BURNER FLAME PATTERN
FIGURE 13
Water temperatures over 125°F can cause severe
burns instantly or death from scalds. Children,
di s ab l ed, and el derl y are at hi g hes t ri s k o f be i ng
scalded. Feel water before bathing or
showering. Temperature limiting valves are
available, and should be installed when lower
outlet temperatures are required.
Should overheating occur or the gas fail to shut off, turn
off the manual gas control valve to appliance, and call a
qualified service person to check for the cause.
Note: Burner rods, running parallel with burner tubes, are not used
on all modells and are not shown on above drawings.