LAARS IGI-180C - Installation Manual - Manual (Page 52)

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2. To set the desired temperature on the control, all hot water faucets must be closed. If there are
Remote Controls installed, press the “Priority” button on the control you want to change the
setting on and the yellow “Priority” indicator light will glow.
3. Press the “H” or “C” button until the required temperature is displayed on the digital monitor. All
residential controls have a maximum temperature setting of 160
°F.
4. To operate the water heater, simply turn any hot water tap on. This will automatically light the
burner and provide hot water at the preset temperature. If the optional remote controls have
been installed, the green “IN USE” indicator light will glow on all remote controls.
5. The control(s) can also display diagnostic error codes, water flow rate through the unit (in gallons
per minute) and the outlet water temperature.
6. Pressing the “Priority Button” followed by the “H” button will display a sequence of up to 9 error
codes, if any, stored in memory that has been experienced. Any error codes will be displayed on
the digital monitor in sequence starting with the most recent code.
7. To display the water flow through the water heater with hot water in use, depress the “H” button
for 2 seconds and then simultaneously press the “P” button. (GPM = Display Readout X 0.1).
8. To display the outlet water temperature while in use, depress the “C” button for 2 seconds and
then simultaneously press the “P” button.
Main or Bath Control for Residential Models
°F
Set Temperature
Main Controller
239-44509-00
In Use
Priority
endless hot water system
CAUTION: Hotter water increases the risk
of scald injury. Before changing temperature
setting, see instruction manual.
Figure 48
NOTICE
The temperature can only be adjusted between 98
°F and 110°F when the hot water tap is open
and hot water is flowing. This is a safety feature to prevent scalding while hot water is in use.
NOTICE
The default temperature setting displayed for residential controls that will appear when the water
heater is first connected to the electrical supply or in the event of a power interruption is 120
°F.