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O p e r a t i n g I n s t r u c t i o n s
Flame failure : When there is no flame. Flame rod stops sending flame signal to the main controller for
stopping gas supply to burner.
Remaining flame safety device: If the flame remains on the burner after the water tap has been turned off
and the water temperature inside heat exchanger reaches 105℃ , bi-metal safety device shuts off the
solenoids and stops gas supply.
Over boiling: If the hot water temperature reaches 90℃ , hot water thermistor sends signal to the main
controller to stop gas supply.
Water flow sensing device : If water flow is restricted or stopped, the water flow sensor stops sending
magnetic pulse signal to the main controller for stopping gas supply.
Over heat protection: If the heat exchanger burns out or the temperature reaches 139℃ overheat
protection device is activated to shut down water heater.
Over pressure protection device: If the water pressure inside the water heater is over 2100kPa, the
pressure relief valve located near hot water outlet will open to release the built up pressure until it
reduces to 1500kPa and it will then be closed.
Combustion fan revolution check: The fan revolution speed is continually monitored by a speed
detection sensor. If the fan speed deviates from the required speed, a signal is sent to the main controller
and the speed is adjusted accordingly.
UZW11RM / UZW11TM water heater is capable to deliver 11L/min hot water at 25℃ temperature rise,
which is suitable for usual bathing purpose for all seasons. You can select the desired temperature by
setting temperature on control panel and the water heater will automatically provide hot water at that
temperature. However, under some exceptional situation, in addition to setting temperature on control
panel, you may require to adjust the water flow to attain the desired temperature.
In winter, there may be occasional extremely cold weather where supply water temperature is exceptionally
low or required water flow is too high, the temperature of hot water may be less than the selected
temperature. You may appropriately reduce the hot water flow by adjusting water faucet or shower tap to
attain the suitable hot 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, the temperature of hot water may be higher than the
selected temperature. 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.
Safety Device
Temperature Modulation Water Heater Temperature Setting Reminder