Rinnai RL75I User Manual

Direct Vent Tankless Water Heater
Installaon and Operaon Manual
— Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
 Do not try to light any appliance.
 Do not touch any electrical switch; do not use any phone in your building.
 Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instrucons.
 If you cannot reach your gas supplier, call the re department.
— Installaon and service must be performed by a licensed professional.
This enre manual must be le for the consumer. The consumer must read and
refer to this manual for proper operaon and to maintain the water heater.
If the informaon in these instrucons is not followed exactly, a re or explosion
may result causing property damage, personal injury or death.
WARNING
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR OPERATING THIS WATER HEATER.
This manual provides informaon on the installaon, operaon, and maintenance of the water heater. For proper
operaon and safety, it is important to follow the instrucons and adhere to the safety precauons.
A licensed professional must install the water heater according to the exact instrucons on pages 4-30.
The consumer must read the enre manual to properly operate the water heater and to have regular maintenance
performed.
ANS Z21.10.3 ● CSA 4.3
FOR INDOOR APPLICATIONS ONLY
RL75i ..................... REU-VC2528FFUD-US
REU-VC2528FFUD(A)-US
RL94i ..................... REU-VC2837FFUD-US
FOR OUTDOOR APPLICATIONS ONLY
RL75e .................... REU-VC2528WD-US
REU-VC2528WD(A)-US
RL94e .................... REU-VC2837WD-US

Rinnai RL75I Specifications

General

Type	Tankless
Fuel Type	Natural Gas or Propane
Flow Rate	7.5 GPM
Energy Factor	0.82
Installation Type	Indoor
Max BTU	180, 000 BTU
GPM @ 35° Rise	7.5
Minimum BTU Input	15, 000 BTU
Venting	Direct Vent

Summary

Safety Information

Safety Definitions and Symbols

Explains safety alert symbols (DANGER, WARNING, CAUTION) and their meanings.

Consumer and Installer Safety Practices

Crucial safety behaviors, practices, and warnings for users and installers.

Installation Instructions

Installer Qualifications and General Requirements

Specifies installer skills, licensing, and critical installation rules (DO NOT/MUST DO).

Site Preparation and Component Installation

Covers parts, tools, location, venting, condensate, plumbing, gas, and electric connections.

Unit Setup and Configuration

Addresses altitude, vent length settings, and temperature controller installation.

Specifications and Technical Data

Model Specifications and Technical Data

Key performance metrics, electrical data, and certifications for different models.

Dimensions and Clearance Requirements

Physical dimensions and essential clearance zones for unit placement.

Operation Instructions

Consumer Safety and Basic Operation

Essential safety precautions, operating steps, and gas leak procedures for users.

Temperature Control and Settings

How to use the temperature controller and adjust water temperature settings.

Required Maintenance

Routine Maintenance Procedures

Instructions for cleaning components, checking the vent system, motor care, and filter cleaning.

Flushing, Draining, and Diagnostics

Steps for flushing the heat exchanger, draining the unit, and understanding diagnostic codes.

Limited Warranty Information

Warranty Coverage and Service Procedures

Details on what's covered, duration, exclusions, and how to obtain service.