Rheem 862 series Technical Document

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

Please leave this guide with a responsible officer.

Owner’s Guide

and

Installation Instructions

Continuous Flow

Gas Indoor Water Heater

862 series

627 models

INSTALLER:

The ONLY suitable flue parts are certified Rheem coaxial flue components

carrying the following label:

DO NOT use any other type of flue parts.

Carefully follow the Installation Instructions.

OPERATOR:

DO NOT OPERATE THIS WATER HEATER:

Unless a certified Rheem coaxial flue system, venting to the outside through a certified Rheem

terminal, is installed in accordance with the Installation Instructions.

If a loud continued vibration occurs during operation

PATENTS

This water heater may be protected by one or more patents or registered designs in the name of

Rheem Australia Pty Ltd or Paloma Co., Ltd.

Rheem Australia Pty Ltd is the supplier of the Rheem range of continuous flow gas water heaters,

manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture.

TRADEMARKS

® Registered trademark of Rheem Australia Pty Ltd.

™ Trademark of Rheem Australia Pty Ltd.

Note: Every care has been taken to ensure 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 a 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

RESPONSIBLE OFFICER - We recommend you read pages 4 to 14.

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

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

Water Supplies........................................................................................................................... 11

Save A Service Call................................................................................................................... 12

Installation –Water Heater ....................................................................................................... 15

Connections –Plumbing .......................................................................................................... 24

Flueing........................................................................................................................................ 26

Connections –Electrical........................................................................................................... 43

Multiple Installations................................................................................................................. 44

Commissioning.......................................................................................................................... 47

Draining The Water Heater ....................................................................................................... 54

Warranty..................................................................................................................................... 55

ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION

This water heater is designed for the purpose of heating potable water. Its use in an application other than

this may shorten its life.

MODEL TYPE

The Rheem®continuous flow gas water heater model you have chosen is for indoor installation only. This

model has an extended manufacturer‟s warranty (refer to the Rheem warranty on page 55).

The water heater has a maximum preset outlet temperature setting of:

862 series 82°C

If a temperature controller is connected to the water heater, this will

override the preset outlet temperature setting and the maximum

temperature setting will be:

Kitchen controller connected 60°C

Bathroom controller only connected 50°C

WATER HEATER OPERATION

The water heater operates automatically, heating water as it passes

through the water heater. When a hot tap is opened, the gas burners

ignite to provide immediate heating of the water. The heat produced by

the burner is transferred to the water through the heat exchanger. The

water is heated to a constant temperature by the automatic adjustment

of the gas supply to the burner to suit the water flow rate. The gas

burners extinguish when the hot tap is closed.

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

GAS BOOSTING FOR A SOLAR WATER HEATER

The 862 series water heater may be installed as an in-series gas booster to a solar water heater. For

information relating to the function and operation of the solar water heater, refer to the Owner‟s Guide and

Installation Instructions supplied with the solar water heater.

Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened.

Solar heated water can reach temperatures up to 70°C to 80°C for a Premier Loline and Loline pumped

system and a Hiline thermosiphon system and possibly higher for a Premier Hiline thermosiphon system.

The in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or

rainy weather, or during colder months. The in-series gas booster operates automatically.

When the solar heated water is at a temperature higher than 2°C below a water heater preset outlet

temperature setting of up to 75°C (i.e. 68°C or above if the preset outlet temperature setting is 70°C) or

higher than 4°C below a water heater preset outlet temperature setting of 82°C, the flow passes through the

in-series gas booster without boosting. When the solar heated water is at a temperature lower than 2°C

below a water heater preset outlet temperature setting of up to 75°C (i.e. below 68°C if the preset outlet

temperature setting is 70°C) or lower than 4°C below a water heater preset outlet temperature setting of

82°C, the in-series gas booster heats the water to a minimum temperature of the preset outlet temperature

setting.

ABOUT YOUR WATER HEATER

MAINS PRESSURE

The water heater is designed for direct connection to the mains water supply. If the mains supply pressure in

your area exceeds that shown on page 17, a pressure limiting valve must be fitted. The supply pressure

should be greater than 140 kPa for the rated flow and performance to be achieved.

HOW HOT SHOULD THE WATER BE?

The water heater has a maximum preset outlet temperature setting

of 82°C. For applications requiring sanitising temperatures, the

outlet temperature should be set at 82°C. The minimum

recommended preset outlet temperature setting is 60°C.

If the water heater is installed as part of a circulated hot water flow

and return system in a building, the preset outlet temperature setting

of the water heater must be set to at least 60°C.

If a controller is not installed, the water heater heats the water to the

preset outlet temperature setting. The factory preset outlet

temperature setting is:

862 series 60°C for a single water heater

60°C as part of a Multipak®system

70°C as part of a Commpak®system

Note: The preset outlet temperature setting of this water heater

cannot be adjusted by the householder. The setting can only be

adjusted by the installer, Rheem Service or their nearest Accredited

Service Agent.

Note:AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in

potable water. When this water heater is used as an in-series booster for a solar water heater it can satisfy

this AS 3498 requirement provided it is energised, the booster preset outlet temperature setting is 70°C or

higher, and that a remote temperature controller is not used.

Warning: Temperature controllers must not be fitted to this water heater (862 series) if it is installed as

an in-series gas booster with a solar water heater system or if a Water Star water heater is installed because

water at a temperature much higher than the controller setting can be delivered. If a solar or Water Star

water heater has been installed to an existing water heater installation, then all controllers must be

disconnected and removed.

If this water heater is installed as part of a solar water heater system, the system can deliver water at

temperatures from 58°C up to 80°C and possibly higher depending upon the model of solar water heater

installed.

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 be required by regulations that an approved temperature limiting device be fitted

into the hot water piping to ablution, bathing and public areas when an 862 series water heater is installed.

This will keep the water temperature below the maximum permitted by AS/NZS 3500.4 to these areas. The

risk of scald injury will be reduced and if no controllers are installed and the preset outlet temperature setting

has not been adjusted below 55°C or if a Kitchen controller is installed, still allow hotter water to the kitchen,

laundry and other areas requiring sanitising temperatures.

maximum preset outlet

temperature setting (82°C)

maximum recommended

supply temperature to

bathrooms, ensuites and

public areas

minimum recommended preset

outlet temperature setting

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.

The water heater uses 240 Volt AC electrical power for operation of the control systems and the combustion

fan. The removal of the front panel will expose 240 V wiring. It must only be removed by a qualified person.

The power lead from the water heater must be plugged into an electrical outlet. Take care not to touch the

power plug with wet hands.

SAFETY

This water heater is supplied with temperature sensors, a FlameSafe®protection system and a 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.

If the power supply cord or plug is damaged, it must be replaced by a qualified person in order to avoid a

hazard. The power supply cord and plug must be replaced with a genuine replacement part available from

Rheem. Phone Rheem Service or their nearest Accredited Service Agent to arrange for an inspection.

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

PRECAUTIONS

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

installed over 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 “General Maintenance” on page 7, “Minor Six Month Maintenance” on page 7 and “Annual Service”

on page 7.

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.

GENERAL MAINTENANCE

The jacket of the water heater can be cleaned with a soft cloth and warm mild soapy water. Under no

circumstances should abrasive materials or powders be used.

Condensate Trap

A condensate trap may be installed as part of a condensate drain line from the secondary flue system.

Regularly check a condensate trap, if one is installed, to ensure it is filled with water. If a trap is dry or the

water level is low, then a trap must be refilled.

To check and / or refill a trap with water, remove the clamp securing the hose of the condensate trap to the

spigot on the flue outlet. Remove the hose from the spigot and fill the condensate trap with water. Reconnect

the hose to the spigot. Ensure the hose is not kinked when reconnected.

Warning: Failure to fill a Condensate Trap with water may cause flue gases to escape through the drain

line.

MINOR SIX MONTH MAINTENANCE

It is recommended minor maintenance be performed every six months by the dwelling occupant.

The minor maintenance includes:

Check the water level in the condensate trap (if one is installed). Refer to “Condensate Trap” on page 7.

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

ANNUAL SERVICE

For safe and efficient operation, it is recommended an annual service be conducted on the water heater.

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 annual 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:

Check and if necessary adjust the gas pressure.

Check the operation of and clean the burner.

Check the water level in the condensate trap (if one is installed).

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.

ABOUT YOUR WATER HEATER

TO TURN OFF THE WATER HEATER

If it is necessary to turn off the water heater:

Turn off the controllers(s) (if fitted) by pressing the on / off button.

The light in the on / off button will go out and the priority light (standard controller) or the ACTIVE light

(Deluxe controller), if it is on, will go out.

Switch off the electrical supply at the power outlet to the water heater if there is no risk of freezing

conditions occurring (refer to note below).

Close the gas isolation valve at the inlet to the water heater.

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

Note: If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched

off unless the water heater is drained, otherwise damage could result (refer to “Frost Protection”on page 9

and “Draining the Water Heater”on page 9).

TO TURN ON THE WATER HEATER

Screw in the drain plugs at the cold water inlet and hot water outlet of the water heater if the water

heater has been drained.

Open all of the hot taps in the house (don‟t forget the shower).

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

Air will be forced out of the taps.

Close each tap as water flows freely from it.

Open the gas isolation valve fully at the inlet to the water heater.

Plug in the power supply cord at the power outlet.

Switch on the electrical supply at the power outlet to the water heater.

Turn on a controller, if one is fitted, by pressing the on / off button.

The light in the on / off button and the priority light (standard controller) or ACTIVE light (Deluxe

controller) will both glow.

The water heater will operate automatically when you open a hot tap.

GOING ON HOLIDAYS

If you are going on holidays, it is not necessary to turn the water heater off. If it is necessary to turn off the

water heater, refer to “To Turn Off The Water Heater” on page 8.

ABOUT YOUR WATER HEATER

FROST PROTECTION

The water heater has a frost protection system. The frost protection system will protect the water heater from

damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions

occurring.

Notes:

The frost protection system will be rendered inoperable if electrical power is not available at the water

heater. Damage caused by freezing due to the unavailability of power at the water heater is not covered

by the Rheem warranty (refer to “Terms of the Rheem Warranty” on page 55).

If it is necessary to switch the power off to the water heater and there is a risk of freezing, then it is

necessary to drain the water heater (refer to “Draining the Water Heater” on page 9).

Pipe work to and from the water heater must be adequately insulated to prevent freezing.

The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C

(including wind chill factor).

Refer to “Terms of the Rheem Warranty” on page 55.

DRAINING THE WATER HEATER

Turn off the water heater (refer to “Turn Off The Water Heater” on page 8).

Open a hot tap (preferably the shower outlet).

Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet, on the underside of

the water heater.

Water will drain from the water heater.

When water stops flowing from the water heater, close the hot tap.

Note: It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again.

ABOUT YOUR WATER HEATER

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

Installation requirements are shown on pages 15 to 23. 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, AS 5601 or AS/NZS 5601.1, as applicable under local

regulations, and all local codes and regulatory authority requirements.

Warning: Temperature controllers must not be fitted to this water heater (862 series) if it is installed as

an in-series gas booster with a solar water heater system or if a Water Star water heater is installed because

water at a temperature much higher than the controller setting can be delivered. If a solar or Water Star

water heater has been installed to an existing water heater installation, then all controllers must be

disconnected and removed.

The pipe work between the solar storage tank (if one is installed) and the in-series gas booster has a

minimum recommended pipe size of DN20, MUST BE of copper and be fully insulated in accordance with

the requirements of AS/NZS 3500.4. The insulation must be weatherproof and UV resistant if exposed. The

insulation must be fitted up to the connections on both the solar storage tank and the in-series gas booster.

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 11.

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 page 11.

HOW LONG WILL THE WATER HEATER LAST?

The water heater is supported by a manufacturer‟s warranty (refer to page 55). 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.

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