Adjusting/Setting the Heat-Up Temperature
To change the set temperature on the model SP-1501, drain the water and unplug the unit. Carefully remove the four screws holding the nameplate and locate the two thermostat knurled knobs. The top knob is the thermostat for the high temperature limit setting and the bottom knob is the thermostat for the low temperature limit setting. Insert a small screwdriver into the slotted head of the thermostat knob turning clockwise to raise the temperature limit and counterclockwise to lower the temperature limit. Please note that 1/8 of a turn is approximately equal to ± 5ºF (-15ºC).
DO NOT turn the thermostat more than one full turn in either direction. Reinstall the nameplate and fill the unit with 3” (76mm) of water. During manufacturing the low temperature is preset at 160ºF (71ºC) and the high temperature at 175ºF (79ºC).
On the standard SP-1502 model, the temperature is varied by turning the thermostat knob clockwise for an increase and counterclockwise for a decrease in temperature. The temperature on low setting should approximate 140ºF (60ºC) and on high 190ºF (88ºC).