Rheem 347 Series 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

Gas Domestic Outdoor

Water Heater

347 Series

PATENTS

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

in the name of Rheem Australia Pty Ltd.

TRADEMARKS

®Registered trademark of Rheem Australia Pty Ltd.

TM Trademark of Rheem Australia Pty Ltd.

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.

Warning: Upon completion of the installation and commissioning of the

water heater, leave this guide with the householder or responsible officer.

DO NOT leave this guide inside of the cover of the water heater, as it may

interfere with the safe operation of the water heater or ignite when the water

heater is turned on.

CONTENTS

HOUSEHOLDER –We recommend you read pages 4 to 19.

The other pages are intended for the installer

but may be of interest.

About Your Water Heater............................................................4

Maintenance Requirements........................................................9

Water Supplies...........................................................................13

Save A Service Call ...................................................................17

Installation..................................................................................20

Connections –Plumbing ..........................................................29

Commissioning..........................................................................33

Lighting The Water Heater........................................................34

Draining The Water Heater .......................................................37

Warranty.....................................................................................38

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®water heater model you have

chosen is suitable for outdoor installation only.

The model is a 347 series 4 star gas water

heater.

Water is stored in a vitreous enamel lined

steel cylinder and heated by a gas burner

located under the cylinder. The heat produced

by the burner is transferred to the water

through the base of the cylinder and through

the wall of a flue pipe which passes through

the centre of the cylinder. A flue baffle in this

flue ensures the efficiency of the water heater

is correct. The gas supply to the burner is

controlled by the thermostat so the water is

heated to a constant temperature.

Automatic safety controls are fitted to the

water heater to provide safe and efficient

operation.

HOW HOT SHOULD THE WATER BE?

The water heater features a user adjustable

thermostat, which allows you to personally

choose the most suitable temperature for your

hot water needs. Refer to “Temperature

Adjustment” on page 5.

To meet the requirements of the National

Plumbing Standard the temperature of the

stored water must not be below 60°C.

Note: AS 3498 requires that a water heater provides the means to inhibit the

growth of Legionella bacteria in potable water. This water heater can satisfy

this AS 3498 requirement provided it is operating and the thermostat setting is

60°C or higher, including when it is used as an in-series booster water heater

for a solar water heater.

maximum thermostat

setting

maximum

recommended supply

temperature to

bathrooms and

ensuites

minimum

recommended stored

water temperature

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 this water heater is installed. This will keep the

water temperature below 50°C at the bathroom and ensuite. The risk of scald

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

TEMPERATURE ADJUSTMENT

The temperature adjusting dial is on the

gas valve, located behind the access cover

on the lower front of the water heater. A

setting of ‘5’will normally maintain the

water temperature at about 60°C. Each

number represents a temperature

difference of approximately 6°C.

To increase the water temperature to 66°C

or 73°C, turn the gas control knob

anticlockwise to a setting of ‘6’ or ‘7’

respectively. Refer to “Hotter Water

Increases the Risk of Scald Injury” on

page 5.

PIEZO IGNITION

The “Piezo” push button igniter makes

lighting the pilot flame of your water heater

very easy. Simply follow the instructions on

the label attached to the back of the access

door. There is no need for matches to light

the water heater.

PILOT IGNITER

A permanent pilot flame burns to ignite the

main burner automatically. Heat from the

pilot is absorbed by the water.

ABOUT YOUR WATER HEATER

WARNING

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.

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.

Warning: For continued safety of this water heater it must be installed,

operated and maintained in accordance with the Owner’s Guide and Installation

Instructions.

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.

Do not store flammable or

combustible materials near the water

heater. Flammable liquids (such as

petrol), newspapers and similar articles

must be kept well away from the water

heater and the flue terminal.

Do not use aerosols, stain removers

and household chemicals near the

water heater whilst it is working. Gases

from some aerosol sprays, stain

removers and household chemicals

become corrosive when drawn into a

flame.

Do not store swimming pool chemicals, household cleaners, etc., near

the water heater.

Do not place anything on top of the water heater or in contact with the flue

terminal. Ensure the flue terminal is not obstructed in any way at any time.

Do not use Propane / Butane gas mixtures in a Propane model. A Propane

model is designed to operate on Propane only. The use of

Propane / Butane mixture, such as automotive LPG fuel, in a Propane

model is unsafe and can cause damage to the water heater.

ABOUT YOUR WATER HEATER

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 22, a pressure limiting valve must be fitted. The

supply pressure should be greater than 350 kPa for true mains pressure

operation to be achieved.

PRECAUTIONS

Where damage to property can occur in the event of the water heater leaking,

the water heater must be installed in a safe tray. Construction, installation and

draining of a safe tray must comply with AS/NZS 3500.4 and all local codes

and regulatory authority requirements.

The water heater must be maintained in accordance with the Owner’s Guide

and Installation Instructions. Refer to “Maintenance Requirements” on page 9

and to “Anode Inspection and Replacement” on page 14.

If this water heater is to be used where an uninterrupted hot water supply is

necessary for your application or business you should ensure that you have

back-up redundancy within the hot water system design. This should ensure

the continuity of hot water supply in the event that this water heater were to

become inoperable for any reason. We recommend you seek advice from your

plumber or specifier about your needs and building back-up redundancy into

your hot water supply system.

TO TURN OFF THE WATER HEATER

If it is necessary to turn off the water heater:

Shut down the gas control (refer to “Close Down Procedure” on page 36).

Close the gas isolation valve at the inlet to the gas control.

Close the cold water isolation valve at the inlet to the water heater.

TO TURN ON THE WATER HEATER

Open the cold water isolation valve fully at the inlet to the water heater.

Open the gas isolation valve fully at the inlet to the gas control.

Light the water heater (refer to “Lighting the Water Heater” on page 34).

GOING ON HOLIDAYS

If you are going on holiday for more than a few days the thermostat can be set

to the “” (pilot) position to conserve energy (refer to point 1 of “Close Down

Procedure” on page 36). If it is necessary to turn off the water heater, refer to

“To Turn Off The Water Heater” on page 7.

ABOUT YOUR WATER HEATER

HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?

Installation requirements are shown on pages 20 to 27. The water heater must

be installed:

by a qualified person, and

in accordance with the installation instructions, and

in compliance with Standards AS/NZS 3500.4, and either AS 5601 or

AS/NZS 5601.1 as applicable under local regulations, and all local codes

and regulatory authority requirements.

In New Zealand, the installation must also conform to the New Zealand Building

Code.

VICTORIAN CUSTOMERS

Notice to Victorian Customers from the Victorian Plumbing Industry

Commission. This water heater must be installed by a licensed person as

required by the Victorian Building Act 1993.

Only a licensed person will give you a Compliance Certificate, showing that the

work complies with all the relevant Standards. Only a licensed person will have

insurance protecting their workmanship for 6 years. Make sure you use a

licensed person to install this water heater and ask for your Compliance

Certificate.

DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?

The water heater is suitable for most public water supplies, however some

water chemistries may have detrimental effects on the water heater, its

components and fittings. Refer to “Water Supplies” on page 13.

If you are in a known harsh water area or you are not sure of your water

chemistry, have your water checked against the conditions described on

pages 13 to 16.

HOW LONG WILL THE WATER HEATER LAST?

The water heater is supported by a manufacturer’s warranty (refer to page 38).

There are a number of factors that will affect the length of service the water

heater will provide. These include but are not limited to the water chemistry, the

water pressure, the water temperature (inlet and outlet) and the water usage

pattern. Refer to “Precautions” on page 7.

MAINTENANCE REQUIREMENTS

SERVICE EVERY TWELVE MONTHS

For safe and efficient operation, it is recommended a service be conducted on

the water heater every twelve (12) months.

Warning: Servicing of a water heater must only be carried out by qualified

personnel. Phone Rheem Service or their nearest Accredited Service Agent.

Note: The service and routine replacement of any components, if required, are

not included in the Rheem warranty. A charge will be made for this work. Only

genuine replacement parts should be used on this water heater.

The annual service includes the following actions:

Inspect and flush the temperature pressure relief valve.

Inspect and flush the expansion control valve (if fitted).

Check and if necessary adjust the inlet gas pressure.

Check the piezo igniter, gas control and thermocouple.

Check the operation of and clean the pilot light and main burner.

Visually check the unit for any potential problems.

Inspect all connections.

Check the drain line from the safe tray (if one is installed) is not blocked.

Note: The water heater may need to be drained during this service. After the

completion of the service, the water heater will take some time to reheat the

water. Hot water may not be available for a while.

MAINTENANCE REQUIREMENTS

MAJOR SERVICE EVERY FIVE YEARS

It is recommended a major service be conducted on the water heater every

five (5) years.

Warning: Servicing of a water heater must only be carried out by qualified

personnel. Phone Rheem Service or their nearest Accredited Service Agent.

Note: The major service and routine replacement of any components, such as

the anode and relief valve(s), are not included in the Rheem warranty. A charge

will be made for this work. Only genuine replacement parts should be used on

this water heater.

The major service includes the following actions:

Replace the temperature pressure relief valve.

Inspect and flush the expansion control valve (if fitted). If required, replace

the valve.

Inspect and if required, replace the anode.

If the anode is not replaced, it should be replaced within three years of this

service (refer to “Anode Inspection and Replacement” on page 14).

Check and if necessary adjust the inlet gas pressure.

Check the piezo igniter, gas control and thermocouple.

Check the operation of and clean the pilot light and main burner.

Visually check the unit for any potential problems.

Inspect all connections.

Check the drain line from the safe tray (if one is installed) is not blocked.

Note: The water heater may need to be drained during this service. After the

completion of the service, the water heater will take some time to reheat the

water. Hot water may not be available for a while.

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