ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
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VIEW FAULT CODES: The current error/fault will be displayed on the control panel LCD. If you'd like to review
the last ve errors, you can press the Menu button, then use the Down arrow button to scroll to the History menu
where the last ve (5) heater errors are displayed.
VIEW STACK FLUE GAS TEMPERATURE: Press and hold the POOL/SPA button for more than ve (5) seconds to
view the current Stack Flue Gas temperature.
BASIC HEATER OPERATION
Start the pump. Be sure the pump is running and primed to close the water pressure switch and supply power to
heater. Be sure the pool and/or spa is properly filled with water. Follow the Lighting and Operating instructions
below.
FOR YOUR SAFETY: READ BEFORE LIGHTING
HEATER DSI ELECTRONIC IGNITION LIGHTING/OPERATION
If you do not follow these instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
Do not attempt to light the heater if you suspect a gas leak. Lighting the heater
can result in a fire or explosion which can cause personal injury, death, and
property damage.
WARNING
WARNING
Risk of explosion or fire causing burns or death if safety interlocks are disabled. DO NOT attempt to operate heater when
SERVICE HEATER light is on or if blower or burner will not start. Instead, follow instructions under “To Switch Off Gas to the
Appliance,” and call a qualified service technician to repair unit.
Operation Instructions
HEATING (LED) Indicator:
● This Red LED is on and stays on when the heater’s burner chamber is ring and
should be on whenever the burner is on.
● When this Red LED blinks, it indicates the heater is calling for heat but the burner
chamber is not ring. If this LED is on but the burner fails to re, an error is
OPERATOR CONTROL PANEL
A ashing RNC message is displayed on the second line of the main screen when the heater has been heating for 1000
hours or more. It is recommened to replace the CNC and reset the counter. After the cartridge is replaced, go to the
RNC RESET menu screen to reset the cartridge counter. At any time, to view the amount of time remaining on the 1000
hour timer, go to the RNC TIME menu. Alternately you can turn the heater off and then press and hold the Heater Off
button for 5 seconds to reset the timer. Note: If the counter is reset back to 1000 and the cartridge is not replaced,
the heater still can be used for normal operations. However, Pentair recommends regular maintenance and
replacement.
RNC MESSAGE: CONDENSATE NEUTRALIZER CARTRIDGE (CNC)
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