State SDV 75 70 NE/PE - Manual (Page 26)

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HIGH TEMPERATURE SHUT OFF SYSTEM
This water heater is equipped with an automatic gas shut
off system. The high temperature shut off is built into the
gas control valve. This system shuts off the gas supply to
the water heater burner when high water temperatures are
present. It is non-resettable. If the high temperature shut off
activates, the diagnostic indicator light on the front of the
thermostat will be “ON” (not blinking) and the gas control
valve must be replaced. If this were to occur, turn “OFF”
the entire gas supply to the water heater. Contact the local
gas utility.
NOT ENOUGH OR NO HOT WATER
1. Check the manual gas shut off valve to be sure it is open.
2. If the diagnostic indicator on the front of the thermostat
is blinking, the control must be manually reset by
cycling the control system. To do this, turn the electrical
power supply off and then on.
3. The gas control knob must be turned to the “ON”
position.
4. The ON/OFF switch on the control box must be “ON”.
5. The temperature adjustment dial may be set too low. See
the “Temperature Regulation” section.
6. The gas company can check the gas input to see if it is
correct. An underfired water heater will not heat water as
quickly.
7. Look for leaking or open hot water faucets. Make sure
all are closed.
8. The cold water inlet temperature may be colder during
the winter months. It will take longer to heat the water
and seem like less hot water.
9. If you cannot find what is wrong, call the local gas util-
ity and/or plumbing contractor.
WATER IS TOO HOT
1. The temperature adjustment dial may be set too high.
See the “Temperature Regulation” section.
NOTE: A period of time is necessary after an adjust-
ment has been made for the water temperature to
reach the new temperature setting.
2. If lower temperature settings will not lower the water
temperature shut off the water heater and call the local
gas utility.
For Your Information (cont’d)
Operational Conditions (cont’d)
“AIR” IN HOT WATER FAUCETS
VENTING MANUAL RESET SWITCH
There is a venting manual reset switch located on the vent-
ing hood. If the switch is activated, it will not reset itself.
Before resetting this reset switch, check for flue blockage
and propriety of the venting system. To reset, press the red
button.
BLOWER MOTOR VENTING MANUAL
RESET SWITCH
VENTING HOOD
WARNING
HYDROGEN GAS: Hydrogen gas can be produced in a
hot water system that has not been used for a long period
of time (generally two weeks or more). Hydrogen gas is
extremely flammable and explosive. To prevent the pos-
sibility of injury under these conditions, we recommend
the hot water faucet be opened for several minutes at the
kitchen sink before any electrical appliances which are
connected to the hot water system are used (such as a
dishwasher or washing machine). If hydrogen gas is pre-
sent, there will probably be an unusual sound similar to
air escaping through the pipe as the hot water faucet is
opened. There must be no smoking or open flame near
the faucet at the time it is open.
WARNING
Should overheating occur or the gas supply fail to shut
off, turn “OFF” the manual gas control valve to the
appliance.