Rheem 491 Technical Document

This water heater must be installed and serviced by a qualified person.

Please leave this guide with the householder.

Owner’s Guide

and

Installation Instructions

Electric Domestic Water Heater

Model 491/492 (400L)

PATENTS

This water heater may be protected by one or more patents or registered designs

in the name of Rheem Australia Pty Ltd or Rheem New Zealand Limited.

TRADEMARKS

® Registered trademark of Rheem Australia Pty Ltd or Rheem New Zealand Limited.

TM Trademark of Rheem Australia Pty Ltd or Rheem New Zealand Limited.

Note: Every care has been taken to ensure the accuracy in preparation of this

publication. No liability can be accepted for any consequences,

which may arise as a result of its application.

CONTENTS

HOUSEHOLDER

This booklet contains important information about your

new water heater, including terms of the Rheem warranty.

We recommend you read pages 8 to 41,

and the terms of the Rheem warranty on pages 4 to 7.

The other pages are intended for the installer but may be of interest.

Warranty .......................................................................................4

About Your Water Heater............................................................8

Maintenance Requirements ......................................................14

Water Supplies...........................................................................17

Save A Service Call ...................................................................21

Installation..................................................................................24

Connections –Plumbing .................Error! Bookmark not defined.2

Connections –Electrical.........................................................377

Commissioning..........................................................................39

Draining The Water Heater .....................................................400

RHEEM NEW ZEALAND LIMITED www.rheem.co.nz

For Service Telephone 0800 657 335 NEW ZEALAND

RHEEM ELECTRIC DOMESTIC MAINS PRESSURE

WATER HEATER WARRANTY –NEW ZEALAND ONLY

ELECTRIC WATER HEATERS 491/492 MODELS

In addition to your legal right, in New Zealand Rheem New Zealand Limited

makes the following promise to the owner. We will repair or, if necessary, replace

a defective unit or part of it, which has failed due to faulty manufacture on the

following terms and conditions:

1. THE RHEEM WARRANTY –GENERAL

1.1 This warranty is given in respect of sales in New Zealand by Rheem New

Zealand Limited of 475 Rosebank Road Avondale Auckland 1026.

1.2 Rheem offer a trained and qualified national service network who will repair or

replace components at the address of the unit subject to the terms of the

Rheem warranty in New Zealand –contact your Rheem Service Centre on

0800 657 335.

1.3 For details about this warranty, you can contact your Rheem Service Centre in

New Zealand on 0800 657 335.

1.4 The terms of this warranty and what is covered by it are set out in sections 2

and 3 and apply to water heaters manufactured from 1st October 2018.

1.5 If a subsequent version of thiswarranty is published, the terms of that warranty

and what is covered by it will apply to water heaters manufactured after the

date specified in the subsequent version.

2. TERMS OF THE RHEEM WARRANTY AND EXCLUSIONS TO IT

2.1 The decision of whether to repair or replace a faulty component is at Rheem

New Zealand Limited’s sole discretion.

2.2 Where a failed component or cylinder is replaced under this warranty, the

balance of the original warranty period will remain effective. The replacement

does not carry a new Rheem warranty.

2.3 Where the unit is installed outside the boundaries of a metropolitan area,

defined by Rheem as further than 25 km from a Rheem Service Centre, the

cost of transport, insurance and travelling between the Rheem Service Centre

and the installed site shall be the owner’s responsibility.

2.4 Where the unit is installed in a position that does not allow safe or ready

access, the cost of that access, including the cost of additional materials

handling and/or safety equipment, shall be the owner’s responsibility. In other

words, the cost of dismantling or removing cupboards, doors, walls, roofs or

trap doors and the cost of any special equipment to bring the unit to floor or

ground level or to a serviceable position is not covered by this warranty.

RHEEM ELECTRIC DOMESTIC MAINS PRESSURE

WATER HEATER WARRANTY –NEW ZEALAND ONLY

ELECTRIC WATER HEATERS 491/492 MODELS

2.5 This warranty only applies to the original and genuine Rheem unit in its original

installed location and anygenuine Rheem replacement parts. It does not cover

any plumbing, gas fitting or electrical parts supplied by the installer, that are

not an integral part of the unit, e.g. pipe-work, pressure limiting valve, stop

valves, non-return valves, electrical switches, pumps and fuses.

2.6 The Rheem warranty does not cover faults that are a result of:

a) Accidental damage to the unit or any component, for example Acts of God

such as floods, storms, fires, lightning strikes and the like and Third party

acts or omissions.

b) Misuse or abnormal use of the unit.

c) Installation or use not in accordance with the Owner’s Guide and

Installation Instructions, New Zealand Building Code requirements or with

relevant statutory and local requirements including failure to install a

properly drained safe tray where required by the owners guide and

installations.

d) Connection at any time to a water supply that does not comply with the

water supply guidelines as outlined in the Owner’s Guide and Installation

Instructions, or poor water quality outside the limits specified in the owners

guide and installation instructions.

e) Repairs, attempts to repair or modifications to the unit by a person other

than Rheem Service or a Rheem Accredited Service Technician.

f) Faulty plumbing or faulty power supply.

g) Failure to maintain the unit in accordance with the Owner's Guide and

Installation Instructions.

h) Transport damage.

i) Fair wear and tear from adverse conditions (for example, corrosion).

j) Cosmetic defects.

2.7 If you require a call out and we find that the fault is not covered by the Rheem

warranty, you are responsible for Rheem Service Centre call out costs. If you

wish to have the relevant component repaired or replaced by Rheem that

service will be at your cost.

RHEEM ELECTRIC DOMESTIC MAINS PRESSURE

WATER HEATER WARRANTY –NEW ZEALAND ONLY

ELECTRIC WATER HEATERS 491/492 MODELS

2.8 Subject to any statutory provisions to the contrary, this warranty excludes any

and all claims however arising including under contract or tort for damage to

furniture, carpet, walls, foundations or any other consequential loss or

incidental expenses either directly or indirectly due to leakage from Rheem

unit, or due to leakage from fittings and/ or pipe work of metal, plastic or other

materials caused by water temperature, workmanship or other modes of

failure.

2.9 This warranty excludes to the extent permissible all implied warranties set out

in the Sale of Goods Act 1908 (New Zealand) and all guarantees set out in the

Consumers Guarantees Act 1993 (New Zealand) to the extent that the goods

are acquired for the purpose of resupply in trade consumption in the course of

a process of production or manufacture or repairing or treating in trade other

goods or fixtures on land.

3. WHAT IS COVERED BY THE RHEEM WARRANTY

FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT

3.1 Rheem will repair or replace a faulty component of your unit if it fails to operate

in accordance with its specifications as follows:

What components

are covered

The period from the date

of installation in which

the fault must appear in

order to be covered

What coverage you receive

491/492 series models

All components

Year 1

Repair and/or replacement of the

faulty component, free of charge,

including labour.

The cylinder

(if the water heater

is installed in a

single-family

domestic dwelling)

Years 2 to 12

Replacement cylinder, free of

charge. Installation and repair

labour costs are the

responsibility of the owner.

The cylinder

(if the water heater

is not installed in a

single-family

domestic dwelling)

Years 2 & 3

Replacement cylinder, free of

charge. Installation and repair

labour costs are the

responsibility of the owner.

RHEEM ELECTRIC DOMESTIC MAINS PRESSURE

WATER HEATER WARRANTY –NEW ZEALAND ONLY

ELECTRIC WATER HEATERS 491/492 MODELS

4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY

4.1 To be entitled to make a claim under this warranty you need to:

a) Be the owner of the unit or have consent of the owner to act on their behalf.

b) Contact Rheem New Zealand Limited Service Department without undue

delay after detection of the defect and, in any event, within the applicable

warranty period.

c) Return the faulty component or unit as directed by the Rheem New

Zealand Limited Service Department.

4.2 You are not entitled to make a claim under this warranty if your unit:

a) Does not have its original serial numbers or rating labels.

b) Is not installed in New Zealand.

5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY

5.1 If you wish to make a claim under this warranty, you need to:

a) Contact Rheem New Zealand on 0800 657 335 and provide the owner’s

details, address of the unit, a contact number and date of installation of the

unit or if that’s unavailable, the date of manufacture and serial number

(from the rating label on the unit).

b) A Rheem Service Centre will arrange for the unit to be tested and

assessed on-site.

c) If Rheem determines that you have a valid warranty claim, Rheem will

repair or replace the unit in accordance with this warranty.

5.2 Any expenses incurred in the making of a claim under this warranty will be

borne by you.

6. THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND)

6.1 Our goods come with guarantees that cannot be excluded under the Consumer

Guarantees Act 1993 (New Zealand). If the goods fail to comply with the

applicable guarantees set out under the Consumer Guarantees Act 1993 (New

Zealand) being the guarantee as to acceptable quality, the guarantee as to

correspondence with description or the guarantee as to repair and parts, or if

the goods fail to comply with any express guarantee given by Rheem, then you

are entitled to a replacement or refund and for compensation for any other

reasonably foreseeable loss or damage.

6.2 The Rheem warranty (set out above) is in addition to any rights and remedies

that you may have under the Consumer Guarantees Act 1993 (New Zealand).

ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION

This water heater is designed for use in a single family domestic dwelling for the

purpose of heating potable water. Its use in an application other than this may

shorten its life.

MODEL TYPE

The Rheem®491/492 series water heater you have chosen is suitable for either

indoor or outdoor installation.

Rheem®491/492 series models are available with either a single heating unit or

with twin heating units (refer to “Single Element Model” on page 11 and “Twin

Element Model” on page 11).

Water is stored in a vitreous enamel lined steel cylinder and heated by the

electric immersion heating unit. The thermostat controls the temperature.

Automatic safety controls are fitted to the water heater to provide safe and

efficient operation.

A Rheem®491/492 series water heater

have caps covering brass plugs on one

side of the tank. The plugs and caps

block off alternative connection points

and are not to be tampered with or

removed.

HOW HOT SHOULD THE WATER BE?

The water heater features an adjustable

thermostat, which allows you to choose

the most suitable temperature for your

hot water needs. Refer to “Temperature

Adjustment” on page 9.

A Rheem®491/492 series water heater

is temperature limited to deliver water

not exceeding 50°C to sanitary fixtures

used primarily for personal hygiene

purposes.

To meet the requirements of the

National Plumbing Standard the

temperature of the stored water must

not be below 60°C.

minimum thermostat setting

and minimum recommended

stored water temperature.

top heating unit thermostat

setting on a twin element

model (not adjustable)

maximum thermostat setting

491/492 series 400 models

maximum recommended

supply temperature to

bathrooms and ensuites

ABOUT YOUR WATER HEATER

HOTTER WATER INCREASES THE RISK OF SCALD INJURY

This water heater can deliver water at temperatures which can cause scalding.

Check the water temperature before use, such as when entering a shower or

filling a bath or basin, to ensure it is suitable for the application and will not cause

scald injury.

We recommend and it may also be required by regulations that an approved

temperature limiting device be fitted into the hot water pipe work to the bathroom

and ensuite when a Rheem®491/492 series water heater is installed. This will

keep the water temperature below 55°C at the bathroom and ensuite. The risk of

scald injury will be reduced and still allow hotter water to the kitchen and laundry.

THERMOSTAT

The thermostat automatically controls the electricity supply to the heating unit so

a constant temperature is maintained. The thermostat and its protective over

temperature cut out is mounted inside the front cover of the water heater. There

is no need to switch the water heater off when it is not in use, except when you

are on an extended holiday. The thermostat is fully automatic and power is only

used when heating is required.

TEMPERATURE ADJUSTMENT

A Rheem®491/492 series water heater features a tradesperson adjustable

thermostat. This requires a licensed electrical worker to make any temperature

adjustments. The bottom thermostat (twin element models) has a maximum

temperature setting of 70°C and a minimum temperature setting of 60°C. The

top thermostat on a twin element model has a fixed setting of 60°C and cannot

be adjusted.

We advise you to have an authorised person adjust the thermostat to the lowest

temperature setting that meets your needs, especially if there are young children

or elderly people in your home. Refer to “Hotter Water Increases The Risk of

Scald Injury” on page 9.

ABOUT YOUR WATER HEATER

SAFETY

This water heater is supplied with a thermostat, an over-temperature cut-out and

a combination temperature pressure relief valve. These devices must not be

tampered with or removed. The water heater must not be operated unless each

of these devices is fitted and is in working order.

The operation of the over-temperature cut-out on the thermostat indicates a

possibly dangerous situation. If the over-temperature cut-out operates, it must

not be reset and the water heater must be serviced by a qualified person.

If the electrical conduit to the water heater is damaged, it must be replaced by a

qualified person in order to avoid a hazard. Phone Rheem Service or their

nearest Rheem Service Centre to arrange for an inspection.

The Rheem warranty may not cover faults if relief valves or other safety

devices are tampered with or if the installation is not in accordance with

these instructions.

WARNINGS

This water heater is only intended to be operated by persons who have the

experience or the knowledge and the capabilities to do so.

This water heater is not intended to be operated by persons with reduced

physical, sensory or mental capabilities i.e. the infirm, or by children. Children

should be supervised to ensure they do not interfere with the water heater.

This water heater uses 240 V AC power for the electrically operated

components. The removal of the front cover(s) will expose 240 V wiring. It

must only be removed by a qualified person.

For continued safety of this water heater it must be installed, operated and

maintained in accordance with the Owner’s Guide and Installation

Instructions.

MAINS PRESSURE

The water heater is designed to operate at mains pressure by connecting directly

to the mains water supply. If the mains supply pressure in your area exceeds

that shown on page 25, a pressure limiting valve must be fitted. The supply

pressure should be greater than 350 kPa for true mains pressure operation to be

achieved.

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