Rheem 862 series, 627 series, 872 627 Owner's Manual And Installation Instructions

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.

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.

WATER SUPPLIES

This water heater must be installed in accordance with this advice to be covered by the Rheem warranty.

This water heater is manufactured to suit the water conditions of most public reticulated water supplies. However, there are some known water chemistries which can have detrimental effects on the water heater and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain information from your local water supply authority. This water heater should only be connected to a water supply which complies with these guidelines for the Rheem warranty to apply.

CHANGE OF WATER SUPPLY

The changing or alternating from one water supply to another can have a detrimental effect on the operation and / or life expectation of a heat exchanger in a continuous flow water heater.

Where there is a changeover from one water supply to another, e.g., a rainwater tank supply, bore water supply, desalinated water supply, public reticulated water supply or water brought in from another supply, then water chemistry information should be sought from the supplier or it should be tested to ensure the water supply meets the requirements given in these guidelines for the Rheem warranty to apply.

SATURATION INDEX

The saturation index (SI) is used as a measure of the water‟s corrosive or scaling properties. In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation

index is less than –1.0, the water is very corrosive and the Rheem warranty does not apply to a copper heat exchanger in a continuous flow water heater.

In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a copper heat exchanger in a continuous flow water heater.

Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.

Refer to the Saturation Index chart on page 11.

-1.0

no warranty applies to a:

-continuous flow copper heat exchanger

SATURATION INDEX (SI)

GAS CONTINUOUS FLOW WATER HEATERS

WITHIN WARRANTY

SPECIFICATION

SATURATION INDEX

(calculated @ 80°C water temperature)

no warranty applies to a:

-continuous flow copper heat exchanger

+0.4 +0.80

very corrosive very scaling

scaling

corrosive

SAVE A SERVICE CALL

Check the items below before making a service call. You will be charged for attending to any condition or fault, which is not related to manufacture or failure of a part (refer to “Terms of the Rheem Warranty” on page 55).

NO DISPLAY ON THE CONTROLLER (IF FITTED)

Is the controller turned on?

Press the on / off button.

Is the water heater plugged in and the power outlet switched on? Is power available in the premises?

Try using another electrical appliance.

COLD WATER FROM THE HOT TAP

Is the controller turned on?

Press the on / off button.

Close the hot tap, wait 10 seconds and open the hot tap again. Is the hot tap open enough?

The burners will not light if the flow rate is less than 2.0 L / min.

Is the water heater plugged in and the power outlet switched on? Is power available in the premises?

Try using another electrical appliance.

Is the isolation valve in the gas line open? Is there a gas supply to the rest of the premises?

Try lighting another gas appliance.

Has the gas line been purged of air after installation?

Refer to your plumber.

WATER IS TOO HOT OR NOT HOT ENOUGH

Is the preset outlet temperature of the water heater higher than required? Does the controller you are using have priority?

NO WATER FROM THE HOT TAP

No flow of water from the hot tap may indicate a restriction in or failure of the cold water supply to the water heater. Check for water flow at other taps and that the cold water isolation valve (refer to page 24) is fully open.

WATER FLOW FLUCTUATES

More than two or three taps in use at the same time may cause a decrease in the hot water flow from the taps. This can also be evident if the water heater has been installed as an in-series gas booster to a solar water heater and the solar heated water is at a low temperature.

Are there more than two or three taps open, or are appliances such as a dishwasher or washing

machine, in use at the same time? Ensure only two or three taps or appliances are on at the one time.

Check the flow of the water from one tap, e.g., the shower.

The shower should be adjusted so the hot tap is fully open.

SAVE A SERVICE CALL

GAS BOOSTER OPERATING TOO FREQUENTLY

If the water heater is installed as an in-series gas booster to a solar water heater, you may find that the water heater operates more frequently than expected. This will occur when the solar heated water temperature is 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, which may be experienced during periods of low solar energy gain or if there has been heavy hot water usage. Factors to consider are:

Hot tap not used recently

If a hot tap has not been used for a while, the water in the pipe work between the solar storage tank and the in-series gas booster may have cooled down. The in-series gas booster will sense the cooler water and this will cause the burners on the water heater to ignite and boost the water temperature when a hot tap is first turned on. The burners will extinguish when solar heated water 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 from the solar storage tank reaches the in-series gas booster (refer also to “Fan

Continues to Run after Water Heater Operation Stops” on page 13).

Insufficient sunlight

Insufficient sunlight due to cloudy weather during hotter months or low solar energy contribution in colder months may mean the in-series gas booster operates more often.

Collectors shaded

If trees or other objects shade the solar collectors or if the glass is dirty, the effectiveness of the solar collectors will be greatly reduced. Have the trees trimmed or the solar collectors relocated if the obstruction is permanent or clean the collector glass.

Ensure the glass on your solar collectors is free of dust, salt spray or any other matter, which may reduce the effectiveness of the solar collectors. If the collector glass becomes dirty, hose down or if the solar collectors are accessible, wash the collector glass with water and a soft brush when the solar collectors are cool.

Collector area is too small

For most installations, the number of solar collectors recommended in Rheem literature has been proven to provide the required solar energy to meet the average family needs. However, in some circumstances, it may be necessary to install an additional solar collector.

Are you using more hot water than you think?

Are outlets (especially the showers) using more hot water than you think? Very often it is not realised the amount of hot water used, particularly when showering. Carefully review

the hot water usage. As you have installed an energy saving appliance, energy saving should also be practised. Adjust your water usage pattern to take advantage of maximum solar gains.

Have your plumber install a flow control valve to each shower outlet, basin and sink to reduce water usage.

Water heater size

Do you have the correct size water heater for your requirements? The sizing guide in the sales literature and on the Rheem website (www.rheem.com.au) suggests

average sizes that may be needed.

FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS

It is the normal operation of the water heater for the fan to continue running after heating of the water is finished. The fan may run for up to six minutes after the burners extinguish, to prepare for the next ignition.

SMELL OF FLUE GASES

The flue system may incorporate a condensate drain and condensate trap. A condensate trap must be filled with water to prevent the escape of flue gases. If the water has evaporated flue gases may escape.

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.

SAVE A SERVICE CALL

CLOUDS OF WHITE ‘VAPOUR’ FROM THE FLUE TERMINAL

During the heating cycle, it is not unusual to see water vapour clouds steaming from the flue terminal, particularly on cold days. This is normal operation of the water heater.

PRESSURE RELIEF VALVE DISCHARGING

A pressure relief valve is incorporated into the water heater controls. This valve protects the water heater, by allowing water to escape, in the event of excessive pressure build up in the waterways.

Normal operation

A small volume of water may discharge from the bottom of the water heater when a hot tap is suddenly closed.

Continuous dribble

A continuous dribble may indicate the water supply pressure is above the design pressure for the water heater. If so, a pressure limiting valve must be installed on the cold water supply pipe to the water heater (refer to “Mains Water Supply” on page 17).

ERROR CODE

The water heater provides a diagnostic error code in the event of an interruption to its operation. The error code is displayed on the controller(s) (if installed) and on the OK MONITOR on the front of the water heater as a numerical value. If an error code appears:

Close the hot tap, turn off the controller(s) and switch off the

electrical supply to the water heater.

Check the gas isolation valve at the gas inlet to the water heater is

fully open.

Wait 5 minutes, then switch on the electrical supply to the water

heater, turn on a controller and open a hot tap.

If the error code persists, take note of the numerical code, turn off the hot tap and turn off the controller(s). Phone Rheem Service or their nearest Accredited Service Agent to arrange for inspection.

HIGHER THAN EXPECTED GAS BILLS

Should you at any time, feel your gas account is too high, we suggest you check the following points:

Are outlets (especially the showers) using more hot water than you

think? Very often it is not realised the amount of hot water used,

particularly when showering. Carefully review the hot water usage. Have your plumber fit a flow control valve to each shower outlet, basin and sink to reduce water usage.

Is the in-series gas booster operating too frequently?

Refer to “Gas Booster Operating Too Frequently” on page 13.

Has there been an increase in hot water usage?

An increase in hot water usage will result in an increase in water heater operation.

Has your water heating tariff rate been increased by your gas retailer since your previous account?

IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, PHONE RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT.

INSTALLATION – WATER HEATER

THIS WATER HEATER IS FOR INDOOR INSTALLATION ONLY. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING. Check the water heater is suitable for the gas type available. (refer to the rating label on the water heater)

INSTALLATION STANDARDS

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.

All packaging materials must be removed from the water heater prior to its installation.

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.

If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or business, then there should be redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater was to become inoperable for any reason. We recommend you provide advice to the system owner about their needs and building backup redundancy into the hot water supply system.

The 862 series of 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 HEATER LOCATION

The water heater should be installed close to the most frequently used outlet and its position chosen with safety and service in mind. If this water heater is part of a solar water heater system, it should also be installed close to the solar storage tank. Make sure people (particularly children) will not touch the flue outlet. The flue outlet and air inlet must be clear of obstructions.

Clearance must be allowed for servicing of the water heater. The water heater must be accessible without the use of a ladder or scaffold. Make sure the entire front panel can be removed for service. You must be able to read the information on the rating plate. Remember you may have to take the entire water heater out later for servicing.

There are also special requirements in AS 5601 and AS/NZS 5601.1 for water heaters installed in a garage, an enclosed space and other locations. Remember all local authorities have regulations about putting water heaters into roof spaces.

INSTALLATION – WATER HEATER

This water heater must be installed vertically upright with the water, gas and power connections on the underside, pointing toward the floor. The back of the water heater can be either against a wall or supported by a frame.

Note: The water heater must be well secured to the wall or frame using two fasteners each at the top and bottom of the unit (refer to page 22 for mounting hole positions and weight of the water heater). Use the screws provided only if they are suitable for the wall or frame type. Otherwise select and use alternative fasteners suitable for the application. The fasteners must be capable of bearing the full weight of the water heater so it may not work loose nor impose any load on the gas and water pipe work connected to the water heater. Refer to the fastener manufacturer‟s information and recommendations for the type of fastener to use for the wall or frame type and load bearing requirements.

For a single water heater installation, refer to the typical installation diagram on page 23. For a multiple water heater installation, refer to “Multiple Installations” on page 44 and the typical installation

diagram on page 45.

The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Remember the air may be safe to breathe, but when it goes through a flame, chemical changes take place which may attack the water heater.

VENTILATION

This water heater is to be installed with a Rheem coaxial flue system. The kit enables a room sealed installation, drawing air for combustion from outside of the building.

The ventilation of a room or an enclosure such as a cupboard, where the water heater is installed must comply with the requirements of AS 5601 or AS/NZS 5601.1, as applicable under local regulations.

SECONDARY FLUE

A secondary flue must be installed with an indoor water heater to discharge combustion products to outside the building. The water heater MUST ONLY be installed with a certified Rheem coaxial flue system.

Where more than one water heater is installed, each water heater must be individually flued using a certified Rheem coaxial flue system. A common flue system MUST NOT be used.

Refer to “Flueing” on page 26 for details on the flue requirements and installation details.

SAFE TRAY

PIPE COVER

The pipe work to the water heater can be housed within a pipe cover. A pipe cover kit (PN 299848) is available for such an installation. Refer to the installation instructions which accompany the pipe cover kit.

FROST PROTECTION

The frost protection system will be rendered inoperable if electrical power is not available at the water heater. Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered under the Rheem warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost prone areas. The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C (including wind chill factor).

The cold water line to the water heater must be insulated with suitable thickness insulation if freezing conditions are likely to occur. The insulation must be fitted to the underside of the water heater and be weatherproof and UV resistant if exposed.

INSTALLATION – WATER HEATER

MAINS WATER SUPPLY

Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve that does not have non return valve characteristics (such as an RMC PSL series valve) is required and should be fitted as shown in the installation diagram (refer to page 24).

Model

Relief valve setting

1750 kPa

Max. mains supply pressure

1000 kPa

Min. mains supply pressure *

140 kPa

* minimum water supply pressure required to achieve the rated flow and performance

Notes:

It is not recommended to install this water heater with a low pressure water supply. A minimum water supply pressure of 140 kPa is required to achieve the rated flow and performance of

the water heater.

If this water heater is installed as an in-series gas booster for a solar water heater, the maximum water

supply pressure to the solar water heater, without an expansion control valve (ECV), is generally 800 kPa, however it may be less than this for some models. Refer to the Owner‟s Guide and Installation Instructions supplied with the solar water heater for maximum mains supply pressure details.

If sludge or foreign matter is present in the water supply, it is recommended a suitable filter be

incorporated in the cold water line to the water heater.

This water heater is not suitable for connection to bore water or spring water unless a water treatment

device is fitted.

Refer to “Water Supplies” on page 11 for further information on water chemistry.

PRESET OUTLET TEMPERATURE SETTING

The factory preset outlet temperature setting of the water heater 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

It is usually not necessary to check or adjust the factory preset outlet temperature setting of the water heater, unless the customer or application has a particular requirement for this to be done.

For applications requiring sanitising temperatures, such as a commercial kitchen, it will be necessary to adjust the preset outlet temperature setting to 82°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 must be set to at least 60°C. If the water temperature decreases by more than 5°C through a circulated hot water flow and return system due to heat loss in the ring main, the preset outlet temperature setting of the water heater should be set to at least 65°C.

Gas Booster for a Solar Water Heater 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.

It will be necessary to check and if required to adjust the preset outlet temperature setting of the continuous flow water heater when:

it is installed as an in-series gas booster to a solar water heater it is an existing continuous flow water heater and a solar water heater is then installed.

Refer to “Preset Outlet Temperature Setting” on page 51.

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Rheem 862 series, 627 series, 872 627 Owner's Manual And Installation Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual