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Rinnai infinity 18 - User Manual

Rinnai infinity 18
30 pages
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How to use your
Water Heate
r
Temperature
Control
Operation
Infinity 18
Infinity 20
Infinity 22
Infinity 24
Infinity 32
Your installer is responsible for correct installation.
Installation instructions are located in a pouch attached
to the inside front panel of the water heater.
24 Hr H
ot
W
ater
In all area
s.
0800-746624

Questions and Answers

  • R
    Robert MejiaAug 19, 2025
    What to do if Rinnai infinity 18 starts then shuts down immediately?
    • V
      Victoria MathewsAug 19, 2025
      If your Rinnai Water Heater starts and then immediately shuts down, verify that the power is still on. Also, check that the gas valve at the unit and the gas meter are fully open. Ensure that your hot water tap is fully open as well.
  • J
    James MeadowsAug 22, 2025
    What to do if Flame Failure or Low gas flow in Rinnai infinity 18 Water Heater?
    • R
      Ricardo MorganAug 22, 2025
      If you experience flame failure or low gas flow in your Rinnai Water Heater, first check that the gas is turned on at both the water heater and the gas meter. Then, check that nothing is obstructing the flue outlet. Finally, ensure you turn on the gas supply to the water heater.
  • C
    christian15Aug 25, 2025
    What to do if Rinnai infinity 18 Water Heater starts then the water goes cold?
    • R
      Ryan JenkinsAug 25, 2025
      If your Rinnai Water Heater starts but the water then goes cold, check that the power is still on. Open your hot water tap further, or try another tap. Note that your unit requires a minimum flow of 3L/min to operate.
  • B
    bishopdanielAug 26, 2025
    What to do if power interruption during bath fill with Rinnai Water Heater?
    • L
      Lori BauerAug 26, 2025
      If you experience a power interruption during a bath fill and the water doesn't flow when the power is restored with your Rinnai Water Heater, turn off all hot water taps and press the ON/OFF button twice.
  • M
    Melanie BennettAug 28, 2025
    What to do if Rinnai Water Heater does not attempt to start?
    • S
      Stephen McbrideAug 28, 2025
      If your Rinnai Water Heater does not attempt to start, check that the power is on at the unit and that the cold water valve at the unit is also on.
  • R
    Roger FloresAug 30, 2025
    What to do if Rinnai Water Heater has Over Temperature Warning?
    • M
      Michaela BridgesAug 30, 2025
      If your Rinnai Water Heater is showing an Over Temperature Warning, it is recommended to request a service call.
  • M
    mirandaalexisSep 1, 2025
    What to do if Outgoing Water Temperature Sensor is Faulty in Rinnai infinity 18?
    • R
      Ryan WallaceSep 1, 2025
      If the Outgoing Water Temperature Sensor in your Rinnai Water Heater is faulty, it is recommended to request a service call.
  • M
    madison06Sep 3, 2025
    Why Rinnai infinity 18 has no ignition or gas supply?
    • L
      Lori FergusonSep 3, 2025
      If your Rinnai Water Heater isn't igniting or has no gas supply, verify that the gas is turned on both at the water heater itself, and at the gas meter or cylinder.
  • K
    Kari CarrollSep 6, 2025
    How to fix noticeable reduction in water flow in Rinnai Water Heater?
    • D
      David FrostSep 6, 2025
      If you notice a reduction in water flow in your Rinnai Water Heater, the inlet water filter may need cleaning. It is recommended to request a service call.
  • G
    gregorybullockSep 8, 2025
    What to do if Heat Exchanger Outlet Sensor is Faulty in Rinnai Water Heater?
    • E
      Eric VincentSep 8, 2025
      If the Heat Exchanger Outlet Sensor in your Rinnai Water Heater is faulty, it is recommended to request a service call.

Summary

Features and Benefits of Rinnai Infinity Water Heater

Continuous Hot Water Supply

Provides an endless supply of hot water as long as utilities are connected.

Temperature Limiting Feature

Limits maximum hot water temperature for safety, especially for children.

Compact Power Flued Design

Compact design saves floor and wall space due to power flued venting.

Electronic Ignition System

Electronic ignition eliminates pilot light, saving gas when the unit is off.

Safety and Warning Information

General Safety Precautions

Essential safety guidelines for operating and maintaining the water heater.

Hot Water Burn Hazards

Excessively hot water is dangerous and can cause severe burns, especially to children.

Child Safety Measures

Recommendations for child safety, including tap covers and temperature reduction.

Operating the Rinnai Infinity Water Heater

Operation Without Temperature Controllers

How the unit operates with a factory preset temperature when no controllers are fitted.

Standard Temperature Controller Operation

Details on standard kitchen and bathroom controllers, their functions, and operation.

Deluxe Temperature Controller Features

Overview of deluxe kitchen and bathroom controllers, their functions, and indicators.

Using Deluxe Temperature Controllers

Instructions for operating with one, two, or three deluxe controllers, including clock and bath fill.

Troubleshooting, Warranty, and Service

Troubleshooting Faults and Errors

Guide to diagnosing and resolving error codes and common operational faults.

Warranty Terms and Conditions

Details labour and parts warranty coverage, water quality recommendations, and record keeping.

Service Contact Information

Provides contact details for Rinnai New Zealand Ltd. and their national service hotline.

Rinnai infinity 18 Specifications

General IconGeneral
Energy Source/Fuel TypeNatural Gas or Propane
Energy Factor0.82
TypeTankless
Warranty12 years heat exchanger, 5 years parts, 1 year labor
Gas Connection3/4" NPT
Water Connection3/4" NPT
Electrical Requirements120V, 60Hz

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