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Rinnai 7 Operation Manual
UNIVERSAL WATER CONTROLLERS
ABOUT THE UNIVERSAL WATER CONTROLLER (MC-91Q)
TURNING ON THE CONTROLLER
If the water controller is switched off (No digits displayed in the
digital monitor window) press the On/Off button once.
The ON indicator will illuminate, indicating that the hot water unit
will be ready to supply hot water once a hot water tap is opened.
ADJUSTING TEMPERATURE
Select the desired temperature using the 'Hot water temp' or
buttons until the required temperature is displayed on the
digital monitor.
To operate the hot water unit, open any hot water tap. This will
automatically light the burner providing hot water. The water
heater ‘In Use’ indicator will illuminate on the water controller.
Once the hot water is running, if the set temperature is either too
hot or cold press the 'Hot water temp' or buttons until the
desired temperature is reached.
CHECK WATER TEMPERATURE BEFORE USE.
A parent or carer should always check the temperature before a child is placed
in contact with hot water, see page 5.
Whilst hot water outlets are open the set temperature may be lowered. However
they cannot then be raised above 43°C. In addition, transfer of 'priority' between
controllers is not possible. These are safety features.
The 'beep' sound can be muted by pressing the 'Hot water temp' Up and
Down buttons simultaneously for more than 3 seconds.
Indicates that the Smartstart®
preheater (when fitted)is
activated.
Used to start and stop the
Smartstart® preheat unit (when
fitted), See Smartstart® Operation
on page 15.
Used to switch the water heater
on and off.
Used to transfer control priority
between the temperature
controllers. The controller with
priority has command of the hot
water delivery temperature.
Indicates that a water heater is in
operation and delivering hot
water.
Indicates the temperature
selected. Error message flash in
event of a fault.
Used to select water temperature.
Indicates if this temperature
controller is in control of water
delivery temperature.
WATER HEATER
'In Use' INDICATOR
DIGITAL MONITOR
TEMPERATURE
CONTROL BUTTONS
CONTROLLER
ON INDICATOR
TRANSFER BUTTON
PREHEAT BUTTON
PREHEAT INDICATOR
ON/OFF BUTTON
HOTHOT
COLDCOLD
ON!ON!
CAUTION
NOTE
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