Troubleshoot Mini Tank Models

Installing unit

• It is important that the plumbing not have any check valves or back flow prevention devices before the heater. These devices can prevent thermal expansion and cause pressures to exceed 150 psi. The excess pressure may cause the pressure/temperature relief valve to discharge, and may cause premature failure of the element gasket.
• Use the supplied pressure/temperature relief valve for the heater. If an alternate is used, ensure the valve is rated for a maximum pressure of 150 psi and a max water temperature of 210F. The temperature probe should not extend beyond 4 inches in order to maintain adequate distance from the heating element.
• When filling tank, leave hot outlet tap at sink open while filling to displace all air in tank. Do not energize heater until all air is out of tank. Energizing the heater dry will cause element failure.

Adjust temperatures

• If the water temperature is too hot, adjusting the thermostat counter clockwise will lower the temperature. See: Setting thermostat.
• If the water temperature is too cold, adjusting the thermostat clockwise will lower the temperature. See: Setting thermostat.
• When the heater has reached the temperature set by the thermostat, the indicator light will go off. If the temperature is not at the desired set point, adjust as outlined in either step 1 or 2.

Unit stopped heating

• If the indicator light does not illuminate when adjusting thermostat clockwise: a) Check that the switch is in the ON (I) position; b) Verify the outlet is energized by plugging in a known good appliance such as a lamp. For the GL8 ProTi model, check voltage with a voltmeter to be 110VAC; c) If outlet is good, unplug the heater and remove the front cover. In the middle of the thermostat, there is a small square opening housing the reset button. Attempt to reset by pushing in with a pen point or small screwdriver. If a thermostat requires frequent resetting or cannot be reset, the thermostat may be defective and need replacing; d) If the indicator light still does not come on, the thermostat is defective and needs replacing. Check thermostat; e) If the indicator light works, without any temperature change after 30 minutes, the element should be replaced.