Rinnai REU-2007W, Service Manual

Page: 28 / 69

)*#
)* #, 4
Rinnai’s unique water regulator mechanism ensures the hot water is maintained with no noticeable
change to the desired temperature during use, even if water pressure drops due to another tap being
turned on and increasing the demand.
The following graphs show the performance of the water regulator. On the chart for the 2007, the
top line shows the performance when the incoming water is 25 C, and the lower line when it is 5 C.
The following graphs show that the maximum flow is approximately 20 L/min for the 2008/2408,
24 L/min for the 2424 or 13.5 L/min for the 2007. This maximum flow is reached at 200 kPa inlet
pressure respectively.
Note: Although the 2008 and 2408 will operate at very low water pressures, maximum performance
is not reached unless the incoming pressure is 200 kPa or more. The 2007 requires 340 kPa to reach
maximum performance.
* / <
A preset volume of cold water is mixed with water heated in the heat exchanger.
° °