Maintenance - Rinnai RJ12RML User Instructions

 Flame failure safety device: Using the flame rod sensor to monitor whether the combustion
status is normal. When the flame fails, signal will be sent to the main controller, the device will
activate and stop the operation of appliance.
 Remaining flame protection device: If the flame still remains with the hot water temperature
inside the heat exchanger has reached the design temperature after the hot water tap has been
turned off, the device will activate and stop the operation of appliance.
 Over boiling protection device: If the hot water temperature is higher than the design
temperature, the device will activate and stop the operation of appliance.
 Overheat protection device: If the heat exchanger burns out or the temperature reaches the
design temperature, the device will activate and stop the operation of appliance.
 Over pressure protection device: If the water pressure inside the appliance is over the design
pressure value, the pressure relief valve located near the hot water outlet will be opened to release
pressure. After reducing to the design pressure value, it will then be closed.
 Water flow sensing device: If the cold water flow becomes restricted or stopped, the device
will activate and stop the operation of appliance.

Combustion fan revolution checking device: Using the revolution sensor to monitor whether
the revolution of fan is normal. When the revolution of fan deviates from the required speed, signal
will be sent to the main controller to adjust the revolution.
Reminder of Adjusting Hot Water Temperature
 To suit bathing purpose of different seasons, you may adjust hot water temperature through front panel
control or remote control (if applicable).
 In winter, there may be occasional extremely cold weather where supply water temperature is
exceptionally low or required water flow is too high. Hot water temperature of appliance may be
relatively low. You may appropriately reduce the hot water flow by adjusting water faucet or shower tap
to attain the suitable water temperature.
 In summer, there may be occasional extremely hot weather where supply water temperature is
exceptionally high or required water flow is too low, hot water temperature of appliance may be
relatively higher. You may appropriately increase the hot water flow or mixing with cold water by
adjusting water faucet or shower tap to attain the suitable hot water temperature.
(1) Never use solvents to clean the body of appliance. Please wipe the surface with a soft damp cloth,
then dry with a soft cloth.
(2) Avoid spraying water onto the body of appliance.
(3) If the water flow at shower head is reduced, the holes of shower head may be blocked. It should be
checked and cleaned.
(4) It is necessary for the appliance to be inspected and maintained regularly so that it can be used safely
and efficiently.
Operating Instructions
Safety Devices

Maintenance

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