Temperature Options Without A Temperature Controller; Setting Controller To Mute - Rinnai V75i series Installation And Operation Manual

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.
V75i/e, V65i/e
Celsius °C
* Temperature settings from 125-140 °F (52-60 °C) are available by setting switch 6 to ON in the SW1 Dip
switch (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 controller. When the MCC-91 controller is connected, these higher
temperatures are available on all controller models in the system.
If an MCC-91 controller is used in a residential dwelling for a hydronics application, a mixing valve must also
be installed to limit the potable hot water temperature to a safe temperature. Water temperatures over
125° F (52°C) can cause severe burns or scalding. Refer to the Danger Alert on water temperatures. Rinnai
shall not, in any event, be liable for damages resulting from such misuse or misapplication.
WARNING
These temperatures are suggestions only:

Temperature Options Without a Temperature Controller

The default temperature setting for this appliance installed without a temperature controller is 120° F (49° C). If
desired, the temperature setting can be changed to 140° F (60° C) by adjustment of a switch.
In the SW1 Dip switch (tan switches), set switch 5 to ON to obtain 140° F water temperature setting. Set switch
5 to OFF (default) to obtain 120° F water temperature setting. If a temperature controller is installed, then
switch 5 has no effect on temperature settings.

Setting Controller to Mute

On the MC-91-2 to eliminate the beeps when keys are pressed or to turn the beeps back on, press and hold both
the up and down buttons until a beep is heard (approximately 5 seconds).
Locking the Controller
The MC-91-2 controller can be locked by pressing the Priority button and the up button together for 5 seconds.
A beep will sound confirming that the controller is locked. The display will alternately show "LOC", the
temperature setting, and a diagnostic code if one has been activated. All of the controllers in the system are
also locked.
To unlock the controller press the Priority button and the up button together for 5 seconds.
32
Temperature Settings Available (Fahrenheit °F)
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.



41 42 43 46
Kitchen 120 °F (49° C)
Shower 98 - 110 °F (37 - 43 °C)
Bath Fill 102 - 110 °F (39 - 43 °C)
Value Series Manual
125 130 135 140
* * *
49 52 54 57
150 160
* ** **
60 66 71