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32 Value Series Manual
Seng 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 buons unl a beep is heard (approximately 5 seconds).
Locking the Controller
The MC-91-2 controller can be locked by pressing the Priority buon and the up buon together for 5 seconds.
A beep will sound conrming that the controller is locked. The display will alternately show “LOC”, the
temperature seng, and a diagnosc code if one has been acvated. All of the controllers in the system are
also locked.
To unlock the controller press the Priority buon and the up buon together for 5 seconds.
Temperature Opons Without a Temperature Controller
The default temperature seng for this appliance installed without a temperature controller is 120° F (49° C). If
desired, the temperature seng can be changed to 140° F (60° C) by adjustment of a switch.
Set SW 5 in DIPSW 1 to ON to obtain 140° F water temperature seng. Set SW 5 in DIPSW 1 to OFF (default) to
obtain 120° F water temperature seng. If a temperature controller is installed, then SW 5 has no eect on
temperature sengs.
Temperatures Available with a Controller
The water heater can deliver water at only one temperature seng at a me. 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/O” buon
for 5 seconds while the water heater is OFF.
These temperatures are suggesons only:
* Temperature sengs from 125-140°F (52-60 °C) are available by seng SW 6 in DIPSW 1 to ON. These
models have a default maximum temperature of 120° F (49° C) and an opon (SW 6 in DIPSW 1) to
increase the maximum temperature to 140 °F (60 °C).
DO NOT adjust the other switches unless specically instructed to do so.
WARNING
•Kitchen 120 °F (49° C)
•Shower 98 - 110 °F (37 - 43 °C)
•Bath Fill 102 - 110 °F (39 - 43 °C)
Temperature Sengs Available (Fahrenheit °F)
V75i/e, V65i/e
98 100 102 104 106 108 110 115 120
125
*
130
*
135
*
140
*
150
**
160
**
V94i/e, V94Xi 185**
Celsius °C 37 38 39 40 41 42 43 46 49 52 54 57 60 66 71 85
** These sengs 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.
If an MCC-91-2 controller is used in a residenal dwelling for a hydronic applicaon, 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 resulng from such misues or misapplicaon.
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