Rinnai Continuous Flow Water Heaters Operation Manual page 14

Universal controller (Compact)
How to use two or more Universal water controllers
If the controllers are switched off (no digits displayed in the digital window),
Turning on
press the On/Off button once.
The On indicator on the desired controller will illuminate, indicating that
the hot water unit will be ready to supply hot water once a hot water tap is
opened.
An illuminated On/Off indicator confirms that the desired controller is in
Transferring
control of the water delivery temperature. If the On/Off indicator is not
priority
illuminated press the Transfer button once (while water is not flowing).
The On/Off indicator on the controller will illuminate indicating that the hot
water temperature control has been transferred to this controller and that
the continuous flow water heater will be ready to supply hot water.
Select the desired temperature using the 'Hot water temp.' up and down
Adjusting the
buttons until the required temperature is displayed.
temperature
Once the hot water is running, if the set temperature is too hot or
cold, press the 'Hot water temp.' up and down buttons until the desired
temperature is reached.
With the water running the temperature can be adjusted down as desired,
but as a safety feature can only be adjusted up as far as 43 °C. To increase
the temperature above 43 °C, first stop the water flow.
Rinnai New Zealand Ltd Continuous Flow Water Heater Operation Manual
14
03-11