Rheem 874627PF Installation and Operation Guide

Download

Owner’s Guide

and

Installation Instructions

Continuous Flow

Gas Water Heater

872 series

627 models

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

Please leave this guide with a responsible officer.

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.

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.

Registered 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.

™ Trademark of Rheem Australia Pty Ltd.

TRADEMARKS

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 .......................................................................................................... 25

Connections – Electrical ........................................................................................................... 27

Multiple Installations ................................................................................................................. 28

Commissioning .......................................................................................................................... 31

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

Warranty ..................................................................................................................................... 39

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 outdoor installation only. This model has an extended manufacturer’s warranty (refer to the Rheem warranty on page 39).

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

 872 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.

REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD

At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water.

GAS BOOSTING FOR A SOLAR WATER HEATER

The 872 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

maximum preset outlet

temperature setting (82°C)

maximum recommended

supply temperature to

bathrooms, ensuites and

public areas.

minimum recommended preset

outlet temperature setting

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:

 872 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 (872 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 is 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 872 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.

ABOUT YOUR WATER HEATER

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.

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.

 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 a weatherproof electrical outlet. Take care

not to touch the power plug with wet hands.

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

with the Owner’s Guide and Installation Instructions.

 Do not modify this water heater.  Do not use or store flammable materials in or near this

water heater. Flammable liquids (such as petrol), combustible materials (such as newspapers) and similar articles must be kept well away from the water heater and the flue terminal.

 Do not spray aerosols in the vicinity of this water heater

while it is in operation. Gases from some aerosol sprays become corrosive when drawn into a flame.

 Do not store swimming pool chemicals, household

cleaners, etc., near the water heater.

 Do not place articles on or against this 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 LP gas fuel, in a Propane model is unsafe and can cause damage to the water heater.

PRECAUTIONS

The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions.

Refer to “General Maintenance” on page 7, “Minor Maintenance Every Six Months” on page 7 and “Service

Every Twelve Months” 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.

ABOUT YOUR WATER HEATER

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.

The area around the water heater can be sprayed with insecticide to rid the area of insects. Insects encroaching into or nesting in the water heater can interfere with the operation of the water heater and also damage components.

MINOR MAINTENANCE EVERY SIX MONTHS

It is recommended minor maintenance be performed every six (6) months. Minor maintenance can be performed by the dwelling occupant.

The minor maintenance includes:

 Inspect around the air inlet, flue terminal and the water heater in general for plant growth.

 Trim back any shrubs, bushes or other plants which have encroached around the water heater.

Plant growth across the air inlet and flue terminal can interfere with the performance of the water heater.

 Inspect around the water heater for insect infestations, such as ants.

 Spray insecticide around the water heater if necessary to rid the area of insects. Do not spray the

surface or into the air inlet or flue terminal of the water heater. Insects encroaching into or nesting in the water heater can interfere with the operation of the water

heater and also damage components.

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 service includes the following actions:

 Check and if necessary adjust the gas pressure.  Check the operation of and clean the burner.  Check and clean the line strainer.  Visually check the unit for any potential problems.  Inspect all connections.

ABOUT YOUR WATER HEATER

CIRCULATED HOT WATER FLOW AND RETURN SYSTEM

A Rheem 872 627 model continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Refer to “Circulated Hot Water Flow and Return System” on page 21 for further information and notes on this type of installation.

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 39).

 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 39.

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 24. 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. The Gas installations Standards AS 5601 and AS/NZS 5601.1 place limitations on the location of a gas

water heater within a covered area. Refer to “Installation within a Covered Area” on page 17.

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 or other metal material suitable for potable water 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 39). 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 6.

WATER SUPPLIES

+0.4 +0.80-1.0

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

very corrosive very scaling

scaling

corrosive

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. The saturation index figures stated are calculated using a water temperature of 80°C.

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.

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 39).

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?

REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD

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

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 25) is fully open.

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.

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 bill is higher than expected, 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 bill?

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 OUTDOOR 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, and either AS 5601 or AS/NZS 5601.1 as applicable

under local regulations, and all local codes and regulatory authority requirements. The Gas installations Standards AS 5601 and AS/NZS 5601.1 place limitations on the location of a gas

water heater within a covered area. Refer to “Installation within a Covered Area” on page 17.

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

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.

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 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 was to become inoperable for any reason. We recommend you provide advice to the system owner about their needs and building back-up redundancy into the hot water supply system.

The 872 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. 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.

WATER HEATER LOCATION

The water heater is suitable for outdoor installation only and 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 terminal. The flue terminal and air inlet must be clear of obstructions and shrubbery.

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.

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

INSTALLATION – WATER HEATER

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 23 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.

Alternatively the water heater can be recessed into a wall (refer to “Recess Installation” on page 17). For a single water heater installation, refer to the typical installation diagram on page 24. For a multiple water heater installation, refer to “Multiple Installations” on page 28 and the typical installation

diagram on page 29.

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.

A secondary flue is not required. The water heater must not be installed indoors or in a confined space. The water heater must be located to ensure that the location of the flue terminal complies with the

requirements of AS 5601 or AS/NZS 5601.1, as applicable under local regulations. As a guide the following requirements are extracted from the Gas Installations Standard. The distances are measured along the wall behind the water heater.

 At least 300 mm between the top of the flue terminal

and the eaves.

 At least 500 mm between the flue terminal and the

edge of any opening into the building, such as an openable door or window, measured horizontally*.

 At least 1500 mm between the top of the flue terminal

and the edge of any opening into the building, such as an openable window, measured vertically.

 At least 300 mm between the flue terminal and a

return wall or external corner, measured horizontally*.

 At least 1500 mm between the flue terminal and any

opening into a building, in the direction of the flue discharge.

 At least 500 mm between the flue terminal and a fence, wall or other obstruction, in the direction of the

flue discharge.

Note: * If these horizontal distances cannot be achieved, AS/NZS 5601.1 states an equivalent horizontal distance measured diagonally from the nearest discharge point of the flue terminal to the opening may be deemed to comply. Check with the local regulator.

Note: Two of this model water heater can be installed side by side with minimal clearance between them. The AGA has approved the installation of two of this model water heater with an exemption from the 300 mm minimum clearance requirements between flue terminals, as stated in AS/NZS 5601, clause 5.13.6.5 and AS/NZS 5601.1, clause 6.9.3.

INSTALLATION – WATER HEATER

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

INSTALLATION WITHIN A COVERED AREA

The water heater must be located such that the installation meets the requirements of either AS 5601 or AS/NZS 5601.1 as applicable under local regulations. There must be sufficient ventilation so the water heater has an adequate supply of combustion air and the flue products are dispersed safely. It is the

licensed installer’s responsibility to ensure the installation complies with the relevant sections of the

prevailing Gas installations Standard. Installation of this water heater is permitted within a covered area open on at least two sides, if its flue

terminal is located to ensure a free flow of air across it is achieved. AS/NZS 5601.1 also allows the installation of a continuous flow gas water heater within a covered area open

on one side only if the flue terminal is within 500 mm of the opening, is discharging in the direction of the opening, there are no openings into the building along the wall within the 500 mm distance and the terminal is located to ensure a free flow of air across it is achieved.

PIPE COVER

The pipe work to the water heater can be housed within a pipe cover. A pipe cover kit (PN 299830) is available for such an installation. Refer to the installation instructions which accompany the pipe cover kit.

RECESS INSTALLATION

The water heater can be installed recessed into a wall. A recess box (PN 299831) is available for such an installation. Refer to the installation instructions which accompany the recess box kit for information on its installation.

An additional rating label is supplied attached to the inside of the front cover of the water heater. This is for a service person to access the water heater details when required. The rating plate on the side of the water heater should be moved to or the information copied onto either the front panel of the water heater or to another position which is visible when the water heater is installed so the user can access the water heater details when required.

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).

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.

INSTALLATION – WATER HEATER

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.

PRESET OUTLET TEMPERATURE SETTING

The factory preset outlet temperature setting of the water heater is:

 872 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

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 35.

REDUCING HEAT LOSSES

The hot water line from the water heater and the pipe work between the solar storage tank, if one is installed, and the in-series gas booster must be 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 the both the underside of the water heater and the solar storage tank.

INSTALLATION – WATER HEATER

HOT WATER DELIVERY

This water heater can deliver water at temperatures which can cause scalding. It is necessary and we recommend that a temperature limiting device be fitted between an 872 series water

heater and the hot water outlets in any ablution and public areas such as a bathroom, ensuite or public amenities, to reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this water heater meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water temperatures are not delivered to a bathroom, ensuite or other ablution or public area.

The temperature limiting device used with a continuous flow gas water heater should have:

 a specified ‘minimum temperature differential’ between the hot water inlet and the tempered water outlet

of no greater than 10°C, and

 a specified ‘maximum permitted pressure variation’ in the supply between the hot water inlet and the

cold water inlet of no less than 15%.

Refer to the specifications of the tempering valve. Where a temperature limiting device is installed adjacent to the water heater, the cold water line to the

temperature limiting device can be branched off the cold water line either before or after the isolation valve and pressure limiting valve to the water heater.

If a pressure limiting valve is installed on the cold water line to the water heater and the cold water line to a temperature limiting device branches off before this valve or from another cold water line in the premises, then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.

Two Temperature Zones Using a Temperature Limiting Device

Gas Booster for a Solar Water Heater

The temperature limiting device used with an 872 series in-series gas booster as part of a solar water heater installation must have the additional capability of receiving a hot water supply temperature of up to 99°C if the solar water heater does not have an over temperature protection system to limit the water to no greater than 90°C, such as the Rheem Premier Hiline thermosiphon closed circuit system.

Warning: Temperature controllers must not be fitted to this water heater (872 series) if it is installed as an in-series gas booster with a solar water heater system because water at a temperature much higher than the controller setting can be delivered. If a solar water heater is installed to an existing water heater installation, then all controllers must be disconnected and removed.

INSTALLATION – WATER HEATER

to solar

storage tank

from solar

storage tank

from solar

storage tank

to solar

storage tank

Where a temperature limiting device is installed adjacent to the in-series gas booster, the cold water line to the temperature limiting device can be branched off the cold water line either before or after the isolation valve and pressure limiting valve to the solar storage tank, but it MUST BE before the non-return valve prior to an open circuit direct system. The cold water line to the temperature limiting device can be branched off the cold water line either before or after the non-return valve prior to a closed circuit indirect system. If an expansion control valve is required, it must always be installed after the non-return valve and be the last valve prior to the solar storage tank.

Warning: A non-return valve MUST BE installed on the cold water line to the solar storage tank AFTER the cold water branch to a temperature limiting device prior to an open circuit direct system. Due to the higher water temperatures generated under certain conditions in the solar collectors of an open circuit direct solar water heater, an additional effective back-flow prevention device also should be used as an extra safeguard. Valve manufacturer RMC recommends Dual Check Valve model N7150, as being suitable for this application.

If a combination isolation valve and non-return valve (duo or trio valve) is installed on the cold water line to an open circuit direct solar water heater and the cold water line to the temperature limiting device branches off after this valve, then a second non-return valve must be installed between the cold water branch and the solar storage tank. Due to the higher water temperatures generated under certain conditions in the solar collectors of an open circuit direct pumped solar water heater, an effective back-flow prevention device should be used as the second non-return valve as an extra safeguard. Valve manufacturer RMC recommends Dual Check Valve model N7150, as being suitable for this application.

If a pressure limiting valve is installed on the cold water line to the solar water heater and the cold water line to a temperature limiting device branches off before this valve or from another cold water line in the premises, then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.

In-series Gas Booster as part of an Open Circuit Direct Solar Water Heater Installation

Two Temperature Zones Using a Temperature Limiting Device

In-series Gas Booster as part of a Closed Circuit Indirect Solar Water Heater Installation

Two Temperature Zones Using a Temperature Limiting Device

INSTALLATION – WATER HEATER

CIRCULATED HOT WATER FLOW AND RETURN SYSTEM

A Rheem 872 series continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building.

Notes:

 the preset outlet temperature setting of the water heater must be set to at least 60°C.

Water should not be circulated from a water heater with a temperature setting of less than 60°C.

 the preset outlet temperature setting of the water heater should be set to at least 65°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.

 temperature controllers should not be installed with this water heater as part of a circulated hot water

flow and return system, including when installed as part of an Ez-Link System dual installation.

The circulator must be:

 sized and set to provide a minimum flow rate of 3.0 L/min through the recirculated hot water flow and

return system, and

 either thermostatically and / or timer controlled.

The circulator must not be set to operate continuously, i.e. 24 hours per day.

Temperature Limiting Device

A temperature limiting device cannot be installed in circulated hot water flow and return pipe work. The tempered water from a temperature limiting device cannot be circulated. Where a circulated hot water flow and return system is required in a building, a temperature limiting device can only be installed on a dead leg, branching off the circulated hot water flow and return pipe.

If circulated tempered water were to be returned back to the water heater, depending on the location of the return line connection on the water supply line to the water heater, then either:

 water will be supplied to the cold water inlet of the temperature limiting device at a temperature

exceeding the maximum recommended water supply temperature, or

 when the hot taps are closed no water will be supplied to the cold water inlet of the temperature limiting

device whilst hot water will continue to be supplied to the hot water inlet of the temperature limiting device.

These conditions may result in either water at a temperature exceeding the requirements of AS/NZS 3500.4 being delivered to the hot water outlets in the ablution areas, or the device closing completely and not delivering water at all, or the device failing. Under either condition, the operation and performance of the device cannot be guaranteed.

Circulated Hot Water Flow and Return - Continuous Flow Gas Water Heater

INSTALLATION – WATER HEATER

from solar

storage tank

Circulated Hot Water Flow and Return

In-series Gas Booster as part of a Solar Water Heater Installation

DIMENSIONS AND TECHNICAL DATA

Model

872 627

Rated delivery

(@ 40°C rise)

litres / min

16.7

Recovery

(@ 25°C rise)

litres / min

Mass Empty (unpackaged)

Gas Details

Hourly Gas

Consumption

(MJ)

Min Gas Pressure

(kPa)

Test Point Gas Pressure (kPa)

Max Gas

Pressure (kPa)

Injector Size

(mm)

minimum

maximum

Model

627

Natural

205

1.13

0.193

0.905

3.50

16 x  2.05

Propane

205

2.75

0.277

1.540

3.50

16 x  1.25

INSTALLATION – WATER HEATER

Model numbers: N = Natural, P = Propane. Letter N or P is included in the model number, e.g. 872627NF, to denote gas type. F = Frost protection. Technical data is subject to change.

INSTALLATION – WATER HEATER

TYPICAL INSTALLATION – OUTDOOR LOCATION

CONNECTIONS – PLUMBING

Model

872 627

Hot water connection

R 3/4

Cold water connection

R 3/4

Gas inlet connection

R 3/4

HOT

WATER

POWER

CORD

PRESSURE LIMITING

VALVE (not required if water heater is installed as an inline gas booster to a solar water heater)

GATE VALVE

BALL VALVE

GAS

COCK

COLD OR SOLAR

PREHEAT WATER

GAS

Gas Water Heater

Cold (or Solar Preheat) and Hot Water

and Gas Connection Details

All plumbing work must be carried out by a qualified person and in compliance with the Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements.

All gas work must be carried out by a qualified person and in compliance with the Standard AS 5601 or AS/NZS 5601.1, as applicable under local regulations, and all local codes and regulatory authority requirements.

CONNECTION SIZES

WATER INLET AND OUTLET

All pipe work must be cleared of foreign matter before connection and purged before attempting to operate the water heater. All olive compression fittings must use brass or copper olives. Use an approved thread sealant such as Teflon tape on all threaded joints.

A full flow gate valve or ball valve must be installed on the cold water line or solar preheat water line to the water heater. A non-return valve or stop tap must not be installed. An acceptable arrangement is shown in the diagram. Refer also to “Hot Water Delivery” on page 19 and to “Mains Water Supply” on page 17.

A disconnection union must always be provided at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater.

Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of the water heater.

Notes:

 It is essential all pipe connections be correctly aligned, otherwise component connections within the

water heater may be strained and / or components themselves misaligned. It is recommended also, wherever possible, pipe connections be made at the water heater first and final pipe runs be made in soft copper pipe to allow some adjustment for misalignment.

 Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and

outlet pipes inside the jacket.

 The maximum supply temperature to the water heater when used as an in-series gas booster for a solar

water heater should not exceed 80°C.

CONNECTIONS – PLUMBING

PIPE SIZES

The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made.

To achieve true mains pressure operation, the cold water line to the water heater should be the same size or bigger than the hot water line from the water heater.

The minimum recommended cold pipe or solar preheat pipe and hot pipe size is DN20 for a single water heater installation. If more than one water heater is installed, refer to the table of minimum header pipe sizes on page 28.

IN-SERIES BOOSTER

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 for a single water heater installation, MUST BE of copper or other metal material suitable for potable water and be fully insulated with a closed cell type insulation or equivalent in accordance with the requirements of AS/NZS 3500.4. If more than one water heater is installed, refer to the table of minimum header pipe sizes on page 28.

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. A full flow isolation valve must be installed on the water line to the in-series gas booster.

GAS INLET

The gas connection is made at the underside of the water heater. The pipe work must be cleared of foreign matter before connection and purged before attempting to operate the water heater. An isolation valve and disconnection union must be installed to allow servicing and removal of the water heater (refer to the

diagram on page 25).

Note: Refer to the Gas Installations Standard AS 5601 or AS/NZS 5601.1 for the correct method of sizing the gas supply pipe to the water heater. The pipe size selection must take into account the high gas input of this water heater (refer to table on page 23) as well as all of the other gas appliances in the premises.

Warning: Always isolate the water heater before pressure testing the gas supply system. Disconnect the water heater after the isolation valve to prevent the risk of serious damage to the gas control. The Rheem warranty does not cover damage of any nature resulting from failure to observe this precaution. Refer to rating label for gas types and pressures.

CONNECTIONS – ELECTRICAL

Component

Power

consumption

Comments

Gas water heater

80 Watts

627 – Burner on, anti frost device inactive

175 Watts

627 – Burner on, anti frost device active

All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the Wiring Rules AS/NZS 3000 and all local codes and regulatory authority requirements.

The water heater is supplied with a 1.8 metre lead and plug and requires a weatherproof 240 V 50 Hz general purpose outlet (GPO) to be located within 1.2 metres of the installation. The GPO must be clear of the flue exhaust, draining water, gas supply pipe and water connections.

The power consumption of the water heater is:

The water heater will only operate on a sine wave at 50 Hz. Devices generating a square wave cannot be used to supply power to the water heater.

No of water heaters

1 2 3 4 5

Cold (or solar preheat) and hot header pipe size

DN20

DN25

DN32

DN40

Gas pipe size

DN20

DN25

DN32

DN40

MULTIPLE INSTALLATIONS

A multiple installation of 27 litre gas water heaters on a single manifold is possible, using a parallel plumbing arrangement, where large volumes of hot water are required. It is good practice, but not essential, to install the water heaters in an Equa-Flow® plumbing arrangement. The installation may operate on a dead leg system or a circulated flow and return system.

If a circulated flow and return system is installed, the circulator must be sized and set to provide a minimum flow rate of 3.0 L/min through the circulated hot water flow and return system and be either thermostatically and / or timer controlled. The circulator must not be set to operate continuously, i.e. 24 hours per day.

The cold (or solar preheat) water and hot water manifolds must be designed to balance the flow from each water heater. To achieve this, there are basic installation requirements and principles which must be followed:

1. The maximum number of water heaters in a bank should be 6. Only one bank can be installed.

2. The water heaters must be of the same model.

3. The cold (or solar preheat) water line, cold (or solar preheat) and hot headers and hot water line must be

sized to meet the requirements of both AS/NZS 3500.4 and the application. The gas line must be sized to meet the requirements of AS/NZS 5601 and the application.

Minimum header pipe sizes at the installation are:

Note: Water and gas supply pipe sizes to the installation may be required to be larger than the minimum pipe sizes at the installation to meet the requirements of the Standards and the application.

The recommended branch line size for the cold (or solar preheat) and hot water and gas pipes is DN20.

4. A full flow gate valve or ball valve and if required a pressure limiting valve must be installed on the cold

water line to the system. A non-return valve or stop tap must not be installed. Note: The gate valve or ball valve and pressure limiting valve are not required if this is an in-series gas

booster installation to a solar water heater.

5. A full flow gate valve or ball valve (not a stop tap) must be installed on both the inlet and outlet branches

of each water heater. A non-return valve must not be installed.

6. An isolation valve must be installed on the gas branch of each water heater.

7. An adjustable pressure reducing valve (PRV) (RMC model SYR 312 / 20) must be installed on the cold

(or solar preheat) branch to all but the first water heater. Each PRV is to be adjusted so that each subsequent water heater is staged to operate only after the

required hot water flow rate increases by intervals of 13 litres per minute (refer to “Pressure Reducing

Valve Commissioning Procedure” on page 29).

8. Non-return valves or pressure limiting valves must not be installed on the branch lines to the water

heaters.

9. It is good plumbing practice for all fittings, valves and branch lines to be matched sets all the way along

the manifold.

10. Sufficient space must be left to enable access, servicing or removal of any water heater.

The water heaters can be installed side by side with minimal clearance between them. The AGA has approved the installation of the water heaters with an exemption from the 300 mm minimum clearance requirements between flue terminals, as stated in AS/NZS 5601, clause 5.13.6.5.

A second rating label is attached to the inside of the front cover of each water heater. This can be referenced to determine details of the water heater.

MULTIPLE INSTALLATIONS

Climate Chart

Number of Shower Outlets

1 2 3 4 5 6 7 8 9

number of water heaters warm / tropical climate (20°C inlet temperature)

1 1 1 2 2 2 3 3 3 3 4 4 4 5 5 5 6 6 6

number of water heaters moderate climate (15°C inlet temperature)

1 1 2 2 2 3 3 3 4 4 4 5 5 6 6 6 - - -

number of water heaters cool climate (10°C inlet temperature)

1 1 2 2 3 3 3 4 4 5 5 6 6 6 - - - - -

Refer to the diagram on page 29 for installation and plant layout details.

PRESSURE REDUCING VALVE COMMISSIONING PROCEDURE

The pressure reducing valves must be set and commissioned for each water heater so the water heaters will turn on and off in sequence when the flow rate increases or decreases to a particular rate. This procedure can be conducted with either cold water or solar preheated water, however the temperature of the solar preheated water must be at least 2°C lower than the preset outlet temperature setting of the water heater.

The water heater installation should be sized and the number of water heaters selected to cater for the cold water temperature in winter and assuming a period of no solar gain without any solar preheated water available, if the installation is part of a solar water heater system. The climate chart is based on a flow rate from a shower outlet not exceeding 9 litres per minute and a tempered water temperature of 42°C.

Note: If there are other hot water outlets which may operate simultaneously with the shower outlets, then the operation and flow rates of these outlets need to be considered and an allowance made when selecting the number of water heaters for the application.

Note: An isolation valve and pressure limiting valve are not required on the solar preheat water line to the gas boosters as part of a solar water heater installation. A full flow isolation valve must still be installed on the inlet branch of each water heater.

TYPICAL INSTALLATION – MULTIPLE CONTINUOUS FLOW GAS WATER HEATERS

MULTIPLE INSTALLATIONS

To set and commission the pressure reducing valves:

1. Commissioning: Commission each of the water heaters prior to setting the pressure reducing valve on

the cold (or solar preheat) branch to the water heater (refer to “Commissioning” on page 31).

2. Turn on services: Turn on the water, gas and electricity to the water heaters.

3. Locking screw: Loosen the locking screw on each SYR valve with a flat bladed screw driver.

 To adjust the SYR valve during this commissioning procedure, turn the knob:

 Anti-clockwise = delay unit ignition  Clockwise = bring forward unit ignition

4. Open a hot tap: Open 1 x hot shower or tap to between 7-8 litres / min. The first water heater (without

SYR valve) should ignite and provide hot water.

Notes:

 The flow rate from each shower or tap throughout this commissioning procedure should be between

7-8 litres / min.

 When turned on, each shower or tap must be at an equal flow rate.

5. Temperature limiting device: Set the temperature of any temperature limiting device installed

downstream of the manifold.

6. First water heater: Open the maximum number of showers suitable for 1 x water heater in accordance

with the climate chart. Only the first water heater should be operating. If other water heaters are operating, adjust their SYR valves by turning the knob anti-clockwise until the

water heater turns off.

7. Second water heater: Open the next shower. The second water heater should ignite.

If it fails to ignite, adjust the SYR valve by turning the knob clockwise until the water heater turns on. If other water heaters ignite, adjust their SYR valves by turning the knob anti-clockwise until the water

heater turns off.

8. Turn off the previous shower. The second water heater should turn off.

If it does not turn off, adjust the SYR valve by turning the knob anti-clockwise until the water heater turns off.

9. Open the maximum number of showers suitable for 2 x water heaters, in accordance with the climate

chart. Only the first two water heaters should be operating. If other water heaters downstream are operating, adjust their SYR valves by turning the knob anti-

clockwise until the water heater turns off.

10. Subsequent water heaters: Repeat steps 7 to 9 for each subsequent water heater in the bank.

11. Locking screw: Turn off all showers and lock adjusting screw on the SYR valves. Commissioning is

now complete.

COMMISSIONING

All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may become necessary because of local conditions.

Note: If this water heater is installed as part of a multiple installation, i.e. in a bank of water heaters, it will be necessary to isolate the other water heaters and commission the water heaters one at a time. However, all the water heaters will need to be operating during the checking of the gas inlet pressure.

TO TURN ON THE WATER HEATER

 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.  Check the pipe work for leaks.  Open the gas isolation valve fully.  Check the gas pipe work for leaks.  Plug in the water heater at the power outlet and switch on the electrical supply.  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.

 Open a hot tap.

The water heater will operate automatically.

 Check to ensure the flow from each connected hot tap is sufficient to operate the water heater.

The minimum operating flow rate for all models is 2.0 litres per minute.

 Check and if required adjust the preset outlet temperature setting of the water heater.

Refer to “Preset Outlet Temperature Setting” on page 35.

The automatic water governor incorporated in the water heater is not adjustable. To complete the installation, it is necessary to check the gas supply pressure at the inlet to the water heater

(refer to “Gas Inlet Pressure” on page 31), the minimum test point pressure and the maximum test point pressure (refer to “Burner Gas Pressure” on page 33).

Upon completion and testing of the installation, ensure the controller(s) is turned off (if fitted). Explain to the householder or a responsible officer the functions and operation of the water heater and the controllers (if fitted).

GAS INLET PRESSURE IMPORTANT - CHECK the gas supply pressure at the inlet to the water heater with the water heater and all

other gas burning appliances in the premises operating (burners alight). The minimum gas supply pressure is:

Natural Gas 1.13 kPa Propane 2.75 kPa If this minimum cannot be achieved, it may indicate the meter or the gas line to the water heater is

undersized. It is important to ensure that an adequate gas supply pressure is available to the water heater when other gas burning appliances, on the same gas supply, are operating.

COMMISSIONING

GAS INLET

INLET TEST

POINT ORIFICE

TEST POINT SCREW

WASHER

MANOMETER

Gas Inlet Test Point Pressure

To check the gas inlet pressure:

1. Close any hot taps and ensure the

burners are not operating.

2. Close the gas isolation valve at the gas

inlet to the water heater.

3. Locate the gas inlet test point on the gas

connection to the water heater.

 Remove the test point screw and

washer from the test point orifice.

 Connect the manometer.

4. Open the gas isolation valve fully at the

gas inlet to the water heater.

5. Observe the gas pressure reading on

the manometer. If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating

label, no adjustment is required. If the manometer reading is below the minimum inlet gas pressure rating on the rating label, then either

the gas pipe to the water heater is undersized and needs to be rectified or adjustment is required at the gas regulator.

If the manometer reading is above the maximum inlet gas pressure ratings on the rating label, then adjustment is required at the gas regulator.

6. Switch on the electrical supply at the power outlet to the water heater if it is not already switched on and

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

7. Open a hot tap fully and ensure the burners are fully ignited.

It may be necessary to open a second tap.

8. Turn on all other gas burning appliances in the house which are on the same gas supply.

9. Observe the gas pressure reading on the manometer.

If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating label, no adjustment is required.

If the manometer reading is below the minimum inlet gas pressure rating on the rating label, then either the gas pipe to the water heater is undersized and needs to be rectified or adjustment is required at the gas regulator.

If the manometer reading is above the maximum inlet gas pressure ratings on the rating label, then adjustment is required at the gas regulator.

10. Turn off the other gas burning appliances in the house.

11. If an adjustment was made during Step 9, repeat this procedure from Step 5.

12. Close the hot tap(s).

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

14. Remove the manometer and refit and tighten the test point screw and washer.

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

16. Open a hot tap again so the burners ignite.

17. Test for gas leaks.

18. Close the hot tap.

COMMISSIONING

TEST POINT SCREW

WASHER

TEST POINT ORIFICE

MANOMETER

MIN. BUTTON

MAX. BUTTON

ADJUSTER BUTTON

DIP 1 SET OF DIP SWITCHES

1 2 3

OFF ON

DIP1

1 234

1 2 3 4

OFF ON

DIP2

MIN MAX

ADJ

1 2 3 4

BURNER GAS PRESSURE

It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must be switched on, the burners ignited and hot water must be flowing from a hot tap.

Warning: The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring

terminals. Note: If an 872 series model is installed as an in-series gas booster for a solar water heater, then the

temperature of the water entering the in-series gas booster must be at least 2°C below the water heater preset outlet temperature setting. Otherwise the gas burners will not ignite and the test point gas pressures cannot be measured.

Minimum test point gas pressure

Refer to the rating label on the water heater for the minimum test point gas pressure.

1. Close any hot taps and ensure the burners are not operating.

2. Turn off the controller(s), if one is fitted, by pressing the

on / off button and switch off the electrical supply at the power outlet to the water heater.

3. Remove the screws holding the front panel to the jacket.

4. Gently disengage the front panel and pull forward to

remove from the water heater.

5. Locate the burner pressure test point on the main burner

manifold.

 Remove the test point screw and washer from the

test point orifice.

 Connect the manometer.

6. Switch on the electrical supply at the power outlet to the

water heater and turn on a controller, if one is fitted, by pressing the on / off button.

7. Open the gas isolation valve fully at the gas inlet to the

water heater, if not already open.

8. Open a hot tap slowly until the burners ignite.

9. Press and hold down the MIN button and observe the

reading on the manometer.

 “1L” is shown on the LED display.

10. Release the MIN button.

If the manometer reading observed in step 9 agrees with the rating label, no further adjustment is required.

11. To adjust, press and hold the adjuster button.

 “LH” is shown on the LED display.

Note: The adjuster button must be held down continuously through steps 11 to 13.

12. Press and hold the MIN button and observe the reading

on the manometer.

 The manometer reading will change as the test point

gas pressure adjusts.

Note: While the MIN button is pressed, the gas pressure

will at first increase then decrease, cycling between an upper gas pressure limit (39 on the LED display) and a lower gas pressure limit (01 on the LED display).

13. Release the MIN button when the reading on the manometer agrees with the rating label.

14. Release the adjuster button.

COMMISSIONING

Notes:

 If the burners extinguish and error code 11 or 12 starts to flash on the LED display:

 release the MIN and adjuster buttons  close the hot tap  clear the error code (refer to “Clearing Error Code” on page 34)  recommence the procedure from Step 8.

 If the adjuster button is released before Step 13, clear any error code (if displayed) and recommence the

procedure from Step 8.

Maximum test point gas pressure

Refer to the rating label on the water heater for the maximum test point gas pressure. Follow Steps 8 to 14 of the “Minimum test point gas pressure” procedure

on page 33, but open the hot tap fully and use the MAX button instead of the MIN button. It may be necessary to open two or three hot taps fully, depending upon the model of water heater and the incoming cold water temperature.

Note: In Step 9, “3H” (27 models) will be shown on the LED display. After setting the minimum and maximum test point gas pressures:

 Close the hot tap.  Remove the manometer and refit and tighten the test point screw and washer.  Open a hot tap again so the burners ignite.  Test for gas leaks.  Close the hot tap.  Turn off the controller, if one is fitted, by pressing the on / off button.  Switch off the electrical supply at the power outlet to the water heater.  Refit the front panel and screws to the water heater.

Clearing Error Code

If an error code does appear on the LED display during the commissioning process, it will be necessary to clear the error in order to complete the installation.

To clear an error code:

 switch off the electrical supply at the power outlet to the water heater  check the gas isolation valve at the gas inlet to the water heater is fully open  wait five (5) minutes  switch on the electrical supply at the power outlet to the water heater

COMMISSIONING

Maximum Outlet Temperature

872 series

Kitchen controller connected

60°C

Bathroom controller only connected

50°C

PRESET OUTLET TEMPERATURE SETTING

The factory preset outlet temperature setting of the water heater is:

 872 series 60°C for a single water heater

60°C as part of a Multipak system 70°C as part of a Commpak system

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:

It is usually not necessary to 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.

Refer to “To Check or Adjust the Preset Outlet Temperature Setting” on page 36 to check or if required to adjust the preset outlet temperature setting of the water heater.

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

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.

Note

 Consideration must be given to the delivery temperature to any ablution and public areas such as a

bathroom, ensuite or public amenities. Refer to “Hot Water Delivery” on page 19 and to “Schematics of

Two Temperature Zones Using A Temperature Limiting Device” on page 20.

COMMISSIONING

DIP1

OFF ON

MIN. BUTTON

MAX. BUTTON

ADJUSTER BUTTON

DIP 1 SET OF DIP SWITCHES

1 2 3

OFF ON

DIP1

1 234

1 2 3 4

OFF ON

DIP2

MIN MAX

ADJ

1 2 3 4

DIP1

OFF ON

DIP2

OFF ON

DIP1

OFF ON

TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING

The temperature settings will be displayed on the LED display. The preset outlet temperature settings are:

 872 series 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 82°C

It is necessary to have the electrical supply to the water heater switched on during stages of checking or adjusting the preset outlet temperature setting procedure.

Warning: The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring

terminals. The adjustment must be carried out by a qualified person.

Warning: This procedure will involve the adjustment of dip switches. Adjustment of a dip switch should

only be made with an insulated tool. To check or adjust the preset outlet temperature setting:

1. Switch off the electrical supply at the power outlet to the water heater.

2. Remove the screws holding the front panel to the jacket.

3. Gently disengage the front panel and pull forward to remove from the water heater.

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

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

Note: Wait ten (10) seconds for the electronic system to initialise.

6. Switch dip switches 3 and 4 to the on (up) position on the DIP 1 set of

DIP switches on the I.C. Board. The current preset outlet temperature setting will show on the LED

display. If the temperature displayed on the LED display is the desired preset

outlet temperature setting, then proceed to step 8, as no further adjustment is necessary.

7. Press the MAX button to increase or the MIN button to decrease the

preset outlet temperature setting. Each press of the MAX or MIN button will increase or decrease the

preset temperature by one increment. The MAX and MIN buttons are located underneath the DIP 1 and

DIP 2 set of DIP switches.

872 series

The increments are 38, 40, 42, 43, 45, 50, 55, 60, 65, 70, 75, 82. Set the LED display to 82 on an 872 series water heater if it is

required to deliver sanitising temperatures.

8. Switch dip switches 3 and 4 to the off (down) position.

The LED display will go blank. Note: Wait ten (10) seconds for the setting to be saved. The preset

outlet temperature setting is now set.

9. Switch off the electrical supply at the power outlet to the water heater.

10. Refit the front panel and screws to the water heater.

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

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

heater.

COMMISSIONING

TO TURN OFF THE WATER HEATER

If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises is vacant, then:

 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 (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.  Drain the water heater if there is a risk of freezing conditions occurring (refer to “Draining The Water

Heater” on page 37).

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 39).

 If the power has been switched 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 37).

DRAINING THE WATER HEATER

To drain the water heater:

 Turn off the water heater (refer to “Turn Off The Water Heater” on page 37).  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.

This page is intentionally blank.

RHEEM CONTINUOUS FLOW GAS WATER HEATER

WARRANTY – AUSTRALIA ONLY

CONTINUOUS FLOW GAS WATER HEATER 872 627 MODELS

1. THE RHEEM WARRANTY – GENERAL

1.1 This warranty is given by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New South Wales, the

supplier of Rheem continuous flow gas water heaters, manufactured by Paloma Co., Ltd., a world leader in water heater technology and manufacture.

1.2 Rheem offer a trained and qualified national service network who will repair or replace components at the address of the water heater

subject to the terms of the Rheem warranty. Rheem Service, in addition can provide preventative maintenance and advice on the operation of your water heater. The Rheem Service contact number is 131031, with Contact Centre personnel available 24 hours, 7 days a week to take your call and if necessary to arrange a service call for during normal working hours Monday to Friday (hours subject to change).

1.3 For details about this warranty, you can contact us on 131031 or by email at warrantyenquiry@rheem.com.au (not for service

bookings).

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 after

1st July 2012.

1.5 If a subsequent version of this warranty 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’s sole discretion.

2.2 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are responsible for our standard call out

charge. If you wish to have the relevant component repaired or replaced by Rheem, that service will be at your cost.

2.3 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.

2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by Rheem or further than 25 km from

either a regional Rheem branch office or an Accredited Rheem Service Agent's office, the cost of transport, insurance and travelling

between the nearest branch office or Rheem Accredited Service Agent’s office and the installed site shall be the owner’s

responsibility.

2.5 Where the water heater 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 or walls and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable position is not covered by this warranty.

2.6 This warranty only applies to the original and genuine Rheem water heater in its original installed location and any genuine Rheem

replacement parts.

2.7 The Rheem warranty does not cover faults that are a result of: a) Accidental damage to the water heater or any component (for example: (i) Acts of God such as floods, storms, fires, lightning

strikes and the like; and (ii) third party acts or omissions).

b) Misuse or abnormal use of the water heater. c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with relevant statutory and local

requirements in the State or Territory in which the water heater is installed.

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.

e) Repairs, attempts to repair or modifications to the water heater by a person other than Rheem Service or a Rheem Accredited

Service Agent.

f) Faulty plumbing or faulty gas or power supply. g) Failure to maintain the water heater 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. k) Ice formation in the waterways of a water heater: where the electricity supply has been switched off or has failed and the water

heater has not been drained in accordance with the instructions; or due to an ambient temperature below -20°C (including wind chill factor).

2.8 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for damage to furniture, carpet, walls,

foundations or any other consequential loss either directly or indirectly due to leakage from the water heater, 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 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in the Rheem water heater literature,

any resultant fault will not be covered by the Rheem warranty.

RHEEM CONTINUOUS FLOW GAS WATER HEATER

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

All components

Year 1

Repair and/or replacement of the faulty component, free of charge, including labour.

All components

(only if the water heater is installed in a

single-family domestic dwelling with a preset

outlet temperature setting below 76°C)

Years 2 & 3

Repair and/or replacement of the faulty component, free of charge, including labour.

The heat exchanger

(if the water heater is installed in a

single-family domestic dwelling with a preset

outlet temperature setting below 76°C)

Years 4 to 10

Replacement heat exchanger, free of charge. Installation and repair labour costs are the responsibility of the owner.

The heat exchanger

(if the water heater is not installed in a

single-family domestic dwelling, and with a

preset outlet temperature setting below 76°C)

Years 2 to 5

Replacement heat exchanger, free of charge. Installation and repair labour costs are the responsibility of the owner.

RHEEM AUSTRALIA PTY LTD, A.B.N. 21 098 823 511, www.rheem.com.au

For Service Telephone 131 031 AUSTRALIA or 0800 657 335 NEW ZEALAND

WARRANTY – AUSTRALIA ONLY

CONTINUOUS FLOW GAS WATER HEATER 872 627 MODELS

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 water heater if it fails to operate in accordance with its specifications as

follows:

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 water heater or have consent of the owner to act on their behalf. b) Contact Rheem Service without undue delay after detection of the defect and, in any event, within the applicable warranty period.

4.2 You are not entitled to make a claim under this warranty if your water heater: a) Does not have its original serial numbers or rating labels. b) Is not installed in Australia.

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 on 131031 and provide owner’s details, address of the water heater, a contact number and date of installation of

the water heater or if that’s unavailable, the date of manufacture and serial number (from the rating label on the water heater).

b) Rheem will arrange for the water heater to be tested and assessed on-site. c) If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the water heater 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 AUSTRALIAN CONSUMER LAW

6.1 Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or

refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

6.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the Australian Consumer Law.

Revision Date: 2017 September 122471E

Rheem 874627PF Installation and Operation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION

MODEL TYPE

WATER HEATER OPERATION

REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD

GAS BOOSTING FOR A SOLAR WATER HEATER

MAINS PRESSURE

HOW HOT SHOULD THE WATER BE?

HOTTER WATER INCREASES THE RISK OF SCALD INJURY

SAFETY

WARNINGS

PRECAUTIONS

GENERAL MAINTENANCE

MINOR MAINTENANCE EVERY SIX MONTHS

SERVICE EVERY TWELVE MONTHS

CIRCULATED HOT WATER FLOW AND RETURN SYSTEM

TO TURN OFF THE WATER HEATER

TO TURN ON THE WATER HEATER

GOING ON HOLIDAYS

FROST PROTECTION

DRAINING THE WATER HEATER

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

VICTORIAN CUSTOMERS

DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?

HOW LONG WILL THE WATER HEATER LAST?

WATER SUPPLIES

SATURATION INDEX

CHANGE OF WATER SUPPLY

SAVE A SERVICE CALL

NO DISPLAY ON THE CONTROLLER (IF FITTED)

COLD WATER FROM THE HOT TAP

WATER IS TOO HOT OR NOT HOT ENOUGH

REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD

WATER FLOW FLUCTUATES

NO WATER FROM THE HOT TAP

GAS BOOSTER OPERATING TOO FREQUENTLY

FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS

CLOUDS OF WHITE ‘VAPOUR’ FROM THE FLUE TERMINAL

PRESSURE RELIEF VALVE DISCHARGING

ERROR CODE

HIGHER THAN EXPECTED GAS BILLS

INSTALLATION – WATER HEATER

INSTALLATION STANDARDS

WATER HEATER APPLICATION

WATER HEATER LOCATION

INSTALLATION WITHIN A COVERED AREA

PIPE COVER

RECESS INSTALLATION

MAINS WATER SUPPLY

FROST PROTECTION

PRESET OUTLET TEMPERATURE SETTING

REDUCING HEAT LOSSES

HOT WATER DELIVERY

Gas Booster for a Solar Water Heater

CIRCULATED HOT WATER FLOW AND RETURN SYSTEM

Temperature Limiting Device

DIMENSIONS AND TECHNICAL DATA

TYPICAL INSTALLATION – OUTDOOR LOCATION

CONNECTIONS – PLUMBING

CONNECTION SIZES

WATER INLET AND OUTLET

PIPE SIZES

IN-SERIES BOOSTER

GAS INLET

CONNECTIONS – ELECTRICAL

MULTIPLE INSTALLATIONS

PRESSURE REDUCING VALVE COMMISSIONING PROCEDURE

TYPICAL INSTALLATION – MULTIPLE CONTINUOUS FLOW GAS WATER HEATERS

COMMISSIONING

TO TURN ON THE WATER HEATER

Gas Inlet Test Point Pressure

BURNER GAS PRESSURE

Minimum test point gas pressure

Maximum test point gas pressure

Clearing Error Code