Development Background; Characteristics - Rinnai REU-24 W-A Service Manual

DEVELOPMENT BACKGROUND

The REU-24 W-A is one of a range of continuous flow water heaters produced by Rinnai. The main
features of this unit are: compact size, low NO, combustion, high efficiency, and remote temperature
control.
exchanger to be reduced by 75% compared with conventional instantaneous water heaters.
Low Noise
Incorporation of the 49 dB(A) low noise design in the Infinity 24 allows for installation in crowded
or high density residential areas.
Convenience
Wide proportional temperature control of the hot water from 2.2 to 21 litres per minute, ensures hot
water at a suitable temperature throughout all seasons is selectable. Control of the water temperature
while on the rise to a particular preset temperature with the feedforward and feedback control system
prevents overheated water being supplied if the water heater is turned ON and OFF repeatedly.
The water temperature can be selected in 16 steps from 35°C to 75°C. The temperatures are 35-37-
flow control device; the unit can be used in areas with low water pressure.
Installation
The
light weight, slim, compact form allows improved installation. The main unit and controls are
connected by 2 non-polar cables eliminating problems of mis-connection. Cable installation is simple.
Safety
In the event of a malfunction, one or more of the various safety devices will operate. Depending on
the fault, the Infinity 24 will be shut down by the P.C.B. or directly by the safety devices. In winter,
the automatically operated anti-frost protection heaters ensure that the water in the appliance does not
freeze up.
Economy
Direct ignition to the main burner eliminates wasteful pilot gas consumption. The air gas ratio is
always controlled to the most suitable level by the P.C.B., and as the water flow and gas consumption
changes, combustion conditions are controlled, maintaining high efficiency.
Conventional water heaters supply water at high temperatures. This means that the pipework in the
house is also very hot. Hot pipes lose more heat than cooler pipes. With the Infinity 24, the water in
the house pipes can be kept much cooler, reducing heat loss and thus effectively saving energy.

CHARACTERISTICS

As a result of the adoption of the electronic water