Operating Instructions

The MC-91 temperature controller is supplied with the RL75, RL94, and R98LS models. Additional functions are available through the use of optional controllers.

There are several models of temperature controllers that can be purchased separately. Their description, operation, and installation is provided in this manual in case additional temperature controllers are purchased and installed.

Features Available on Temperature Controllers

Features

Call

Clock

Error Codes

Function

In Use Indicator

ON/OFF Button

Power Save

Priority Button /

Indicator

Sound Volume

Temperature Display

Thermostat

Water Smart / Bath Fill Button / Indicator

Water Volume

MC-91

MCC-91

MC-100

BC-100

MC-502

Description

Sends a short series of beeps to all controllers in the system. It is not an intercom.

12 hour AM/PM clock. (The MC-100 must be installed for clock to work on the BC-100.)

When a fault is detected an error code flashes at the temperature display on models MC-91, MCC-91, and MC-502; and flashes at the clock display on models MC-100 and BC-100.

Used on this model to set the clock or sound volume.

Indicates that hot water is being supplied (i.e. a hot water tap is open).

Used to turn the water heater ON or OFF.

Allows the temperature controller to be in an energy saving mode.

Indicates that this controller is setting the temperature . Priority can be switched to another controller by pressing its Priority Button when no hot water is running.

Used to adjust the voice prompt volume.

Shows the temperature setting.

Increases or decreases the temperature setting.

Used to select the Water Smart / Bath Fill Function to fill a bath with a predetermined volume of water.

Used to select the water volume for the Water Smart / Bath Fill Function.

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VB Series Indoor LS Manual

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Rinnai RL94I, RL75I installation manual Operating Instructions, Features Available on Temperature Controllers