Rinnai RUC80i Training Program page 60

Temperature Controllers:
•
Current production condensing water heaters utilize the
MC-91-2 and MCC-91-2 controllers
replaced the MC-91-1 and MCC-91-1 controllers).
•
Any water heater originally equipped with a MC-91-1/MCC-91-1
controller is compatible with the MC-91-2/MCC-91-2 controller.
•
The MC-91-2 controllers have additional functions (compared to the
MC-91-1 controller).
•
An alternate table of temperature settings are available for
commercial applications.
•
These alternate temperature settings are intended to provide
additional temperature increments between 140⁰F and 185⁰F for
commercial applications. These can only be accessed with the "-2"
controllers.
• Temperature options without a controller.
•
The default temperature setting for units installed without a controller is 120⁰F. However the
temperature setting can be adjusted to 140⁰F by setting dip switch #5 in DIPSW1
to the ON position
switches)
© 2016 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
MC-91-2 / MCC-91-2
(if a controller is connected, switch #5 has no effect on temperature).
Enhancing Lives By Changing The Way Water Is Heated
(The MC-91-2 and MCC-91-2
60
(upper set of
5/4/2018