14
C. TEMPERATURE ADJUSTMENT
❑ The water heater is delivered with either a TPI thermostat or an
ETC102 thermostat. Both have a factory set temperature setting of
125F and differential setting of 10F.
❑ Any temperature adjustment of the thermostat must be made by
qualified service personnel, as shown below.
1. Shut off or disconnect all electrical supply to heater.
2. Remove cover to thermostat.
3. Adjust right side lever to the desired temperature. Moving the lever
down will decrease the temperature. (See THERMOSTAT
DIAGRAM 1 on page 15 and THERMOSTAT DIAGRAM 2 on page
15).
4. NOTE: Markings on slide are approximate. Check the
temperature at faucet to ensure safe operating temperature.
5. Adjust the differential to the desired setting. On an ETC102, turn the
dial on left side to the desired differential. (See THERMOSTAT
DIAGRAM 1 on page 15). On a TPI, adjust the slide on the left to
the desired differential. (See THERMOSTAT DIAGRAM 2 on page
15).
6. The thermostat will call for heat when the tank temperature has
fallen to the set differential degrees below the temperature set point.
7. Reattach cover and reconnect electrical supply.
8. Check faucet temperature to verify desired temperature is achieved.
❑ In order to set the temperature above 140F (NOT RECOMMENDED)
you must remove the SCALD DANGER label attached to the
temperature slide.
❑ CAUTION: Do not increase temperature above 140°F without a
properly installed mixing valve in the system.
D. INDICTAOR LED OPERATION
❑ The thermostat has an indicator LED at the top of the case. (See
THERMOSTAT DIAGRAM 1 on page 15 and THERMOSTAT
DIAGRAM 2 on page 15) or inside cover of thermostat.
❑ When the thermostat is calling for heat, the indicator LED will flash
green.
❑ When the thermostat is satisfied, the indicator LED will be solid green.
❑ If the thermostat detects no probe, the indicator LED will flash red.
E. FIRST POWERUP OPERATION
❑ On the installation of a new thermostat, the controller will run a
diagnostic calibration check where it will shut off for several minutes
after heating to 98 degrees. After that period, it will function normally
and continue heating to the setpoint.
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