Rinnai MCC-91-2W Commercial Controller for LS Series Water Heaters 140°F+

SKU: MCC-91-2W

Weight	1 lbs
Dimensions	8 × 8 × 8 in

$244.20

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Quantity	Unit price	Saving
1–4	$244.20	0%
5–9	$231.99	5%
10+	$219.78	10%

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Rinnai MCC-91-2W Commercial Controller for LS Series Water Heaters 140°F+

Specifications & product details

REGIONS SUPPLY BUYING GUIDE

Product details & buying advice

Identify the water heater and vent system before selecting a control, accessory or vent component.

Product type	Water-heater controls and vent components
Part / SKU	MCC-91-2W

What to check before ordering

Record the full heater model and its indoor/outdoor and condensing/non-condensing configuration.
Use the model instructions to confirm the vent system, diameter and function of the replacement part.
Have a qualified installer check the complete vent route and termination.

Service reminder: A similar diameter or connector is not enough to approve mixed vent components or control models.

Have gas-system installation and service completed by qualified personnel. Use the current instructions for the exact model and the requirements that apply at the installation location.

Product help & manufacturer resources

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Overview

Rinnai MCC-91-2W Commercial Controller for LS Series Tankless Water Heaters (140°F+)The Rinnai MCC-91-2W Commercial Controller provides precise digital temperature control for Rinnai LS Seriestankless water heaters in high-temperature commercial applications exceeding 140°F.This updated model replaces the MCC-91-1W, offering improved reliability and a modern control interface. Designed for professional-grade use, it enables technicians and facility managers to easily adjust, monitor, and maintain optimal water temperatures in demanding environments such as restaurants, hotels, laundromats, and industrial facilities.✅ Factory-Authorized Replacement: Replaces older MCC-91-1W units for LS Series models.✅ Temperature Range: Supports operation above 140°F, ideal for commercial and industrial use.✅ Digital Precision: Clear display with Fahrenheit/Celsius toggle and priority control.✅ Simple Installation: Mounts easily and connects directly to compatible Rinnai tankless units.✅ Durable Design: Built for continuous use in high-demand hot water systems.

Specifications

Brand: Rinnai
Model: MCC-91-2W
Type: Digital Commercial Temperature ControllerCompatibility: LS Series Tankless Water HeatersOperating Range: Above 140°F
Material: Durable Polymer HousingDisplay: LED with °F/°C Conversion

Condition

Brand New

Applications

Restaurants, hotels, and commercial kitchens
Industrial wash stations and laundromatsMulti-unit commercial water heating systemsHVAC and plumbing service replacementThe Rinnai MCC-91-2W is the trusted OEM-grade solution for maintaining accurate, safe, and efficient water temperature control across high-temperature Rinnai LS installations.

Product details

Part / SKU	MCC-91-2W

Package includes

Rinnai MCC-91-2W Commercial Controller for LS Series Water Heaters 140°F+

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

Shipping & availability

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