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6 VA Series Outdoor LS Manual
Temperature
Display
Thermostat
Priority
Indicator
Priority
Button
ON/OFF
Button
In Use
Indicator
Temperature
Display
Thermostat
In Use
Indicator
Priority
Indicator
Priority
Button
ON/OFF
Button
MC-91-1US & MCC-91-1US
MC-502RC-1US-S * (Wireless)
* Requires the transceiver,
MC-502RC-1US-M, to be
connected to the water
heater.
Refer to the MC-502RC-1US-S manual and the Wireless Controller Installation Instructions for complete details
on features, operation, and installation.
Dimensions (inches): 4.33 W x 5.90 H x 1.16 D
Temperature Controllers - Models
The MC-91 controller is the standard temperature controller that is supplied with the water heater. On indoor
models it is integrated into the front panel. The MCC-91 controller is for commercial and hydronic applications
requiring higher temperatures. When the MCC-91 controller is connected, these higher temperatures are
available on all controller models in the system. Refer to the section on temperature ranges.
Dimensions (inches): 3.5 W x 4.75 H x 0.75 D