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Maintenance:
• The Hubbell Tankless Water Heater requires no maintenance other than to
periodically check around the outside of the unit for leaks. If a water leak is detected
from your water heater, turn off the water supply at the shut-off valve on the inlet side
of the water heater, turn off the power to the heater at the main electrical panel and
call a service technician or plumber for evaluation and repair.
• When any maintenance is performed on the water heater or the plumbing system that
may introduce air into the water supply pipes, it is important to turn the power off to
the water heater and purge the air out of the lines before restoring power to the unit.
See Checking for Leaks and Purging Air in Section III.
Temperature Controller User Interface Instructions:
1. The display is always on when power is applied to the unit:
a. To turn t he unit OFF, press and hold t he DOWN button unt il display shows
OFF.
b. The controller will preserve all its settings during any power outage o r
disconnect.
2. To change setpoint temperature (the temperature is fully adjustable in 1° increments).
a. Press the UP or DOWN button to change the setpoint temperature.
b. Pressing and holding either the UP or DOWN button will fast scroll.
3. Configuration Menu.
a. To enter configuration m enu, pre ss and hold t he UP and DOWN buttons
simultaneously for 7 seconds. (Note that the display will change during the time
you are holding t he buttons. You are in the configuration menu and can releas e
the buttons when the first character of the display is ‘P’).
b. To scroll through menu items, press the UP or DOWN button.
c. To leave the configuration menu, wait 7 seconds without pushing any buttons.
d. To make a change to a specific config uration menu item, simultaneousl y press
the UP and DOWN buttons. The m enu item setting will now flash indicating it
can be changed.
e. To scroll through menu item settings, press the UP or DOWN key.
f. When the desired setting is displayed, simultaneously press the UP and DOWN
buttons to lock in the selection and return back to the configuration menu.
g. Configuration Menu Items:
i. Power Setting - Sets the total kW rating of water heater.
1. P###, where ### is adjustable from 001 to 054 (Note that the kW
selection shoul d equal the kW based upon the actual voltage
measured to the heater. Please see the nam eplate on the front
cover of the heater for a listing of kW ratings at various voltages).
ii. Temperature Range – Sets the temperature adjustment range
1. r001, 60° to 140°F (15°-60°C) (Factory Default)
2. r002, 32° to 194°F (0°-90°C)
3. r003, 32° to 104°F (0°-40°C)
iii. Display units – Sets the display units to either Fahrenheit/Gallons or
Celsius/Liters.
1. dEFF, for degrees Fahrenheit and Gallons. (Factory Default)
2. dECC, for degrees Celsius and Liters.
iv. Normal Display Mode– Sets the display to show various values.
1. dSP1, to display setpoint tem
p
erature only. (Factory Default)
a. setpoint is displayed as ###
2. dSP2, to display measured inlet temperature interm ittently with
setpoint temperature.
a. Inlet temperature is displayed as i###
3. dSP3, to display m easured outlet temperature interm ittently with
setpoint temperature.
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