Rinnai RU98e Installation And Operation Manual page 57

Temperatures Available with a Controller
The water heater can deliver water at only one temperature setting at a time. The available temperatures are
provided below. A temperature lower than 98° F (37° C) can be obtained at the tap by mixing with cold water.
To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the "On/Off" button
for 5 seconds while the water heater is OFF.
Fahrenheit °F
Celsius °C
* Temperature settings from 125-140 °F (52-60 °C) are available by setting switch 6 to ON in the SW1 tan
switches. These models have a default maximum temperature of 120° F (49° C) and an option (switch 6) to
increase the maximum temperature to 140 °F (60 °C).
** These settings require the MCC-91-2 controller. When the MCC-91-2 controller is connected, these higher
temperatures are available on all controller models in the system. Use of an MCC-91-2 controller in a
residential dwelling will reduce the warranty coverage to that of a commercial warranty application.
WARNING
These temperatures are suggestions only:
Alternate Temperature Settings
A different range of temperature settings is available by setting switches 2 and 3 of the SW2 dip switch (white) to
ON. The table below shows the settings available with the MC-91-2 and MCC-91-2 controller.
WARNING
Fahrenheit °F
Celsius °C
Temperature Settings Available
98 100 102 104 106 108 110 115 120
37 38 39 40
DO NOT adjust the other switches unless specifically instructed to do so.
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MC-91-1, MCC-91-1, MC-100V-1, and BC-100V-1 controllers are not compatible with
Alternate Temperature Settings. Alternate Temperature Settings are for commercial
applications only.
DO NOT use the MC-91-1, MCC-91-1, MC-100V-1, or BC-100V-1 controllers when dip
switches 2 and 3 (white) are in the ON position.
Alternate Temperature Settings Available
110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185
43 46 49 52
MC-91-2
41 42 43 46
Kitchen 120 °F (49° C)
Shower 98 - 110 °F (37 - 43 °C)
Bath Fill 102 - 110 °F (39 - 43 °C)
54 57 60 63
MCC-91-2
KB Series Manual
125 130 135 140
* * *
49 52 54 57
66 68 71 74
150 160 185
* ** ** **
60 66 71 85
77 79 82 85
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