Rheem 27 Technical Document

This water heater must be installed and serviced by an authorised person.

Please leave this guide with the householder.

Owner’s Guide

and

Installation Instructions

Electronic Continuous Flow

Gas Indoor Water Heater

864, series

027 models

INSTALLER:

The ONLY suitable flue parts are certified Rheem coaxial flue components carrying the following label:

DO NOT use any other type of flue parts.

Carefully follow the Installation Instructions.

OPERATOR:

DO NOT OPERATE THIS WATER HEATER:

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

terminal is installed in accordance with the Installation Instructions.

• If a loud continued vibration occurs during operation

PATENTS

This water heater must be installed by a licensed person

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.

Make sure you use a licensed person to install this water heater and ask for your Compliance Certificate.

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.

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

Rheem Australia Pty Ltd or Paloma &R Ltd.

Rheem Pty Ltd is the New Zealand supplier of the Rheem range of electronic continuous flow gas water heaters,

manufactured by Paloma &R Ltd, a world leader in water heater technology and manufacture.

TRADEMARKS

® Registered trademark of Rheem New Zealand Pty Ltd.

™ Trademark of Rheem 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.

Notice to Rheem customers.

CONTENTS

HOUSEHOLDER - We recommend you read pages 4 to 42.

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

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

Temperature Control................................................................................................................... 9

Temperature Control – Standard............................................................................................. 10

Temperature Control – Deluxe................................................................................................. 20

Water Supplies........................................................................................................................... 39

Save A Service Call................................................................................................................... 40

Installation – Water Heater....................................................................................................... 43

Connections – Plumbing.......................................................................................................... 55

Flueing........................................................................................................................................ 57

Connections – Electrical........................................................................................................... 74

Ez-Link System Dual Installation............................................................................................. 75

Installation – Controllers.......................................................................................................... 79

Commissioning.......................................................................................................................... 86

Draining The Water Heater....................................................................................................... 93

Warranty..................................................................................................................................... 95

ABOUT YOUR WATER HEATER

MODEL TYPE

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

only. This model has an extended warranty (refer to “Warranty” on page 96).

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

•864 series 75°C

Notes:

•The 864 series water heater may be installed as an in-series gas booster water heater to a solar preheat

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.

•When installed as a gas booster to a solar preheater, the 864 series water heater:

Can deliver water at temperatures up to 75°C for a Premier Loline and Loline pumped system and a

Hiline thermosiphon system and possibly higher temperatures from a Premier Hiline thermosiphon

system.

During periods of low solar energy gain, will boost the water temperature automatically to a

minimum 75°C when required.

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 (refer to

“Temperature Control” on pages 9 to 38). The gas burners extinguish

when the hot tap is closed.

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

and efficient operation.

GAS BOOSTING FOR A SOLAR WATER HEATER

Water stored in the solar storage tank passes through the gas booster

water heater when a hot tap is opened. The gas booster water heater

is for heating water at times of low solar energy gain, such as during

cloudy or rainy weather, or during winter months.

Solar heated water can reach temperatures up to 75°C for a Premier Loline and Loline pumped system and

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

booster water heater operates automatically. When the solar heated water temperature is 58°C or higher, the

flow passes through the gas booster water heater without boosting. When the solar heated water

temperature is below 58°C, the gas booster water heater heats the water to a minimum temperature of 75°C.

ABOUT YOUR WATER HEATER

MAINS PRESSURE

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

your area exceeds that shown on page 45, 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 may be installed with one or more user

adjustable temperature controllers, which allow you to choose

the most suitable temperature for your hot water needs (refer

to “Temperature Control” on page 9).

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:

•864 series 55°C

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, your nearest Rheem

Service Department or their Accredited Service Centre.

If this water heater is installed as part of a solar water heater

system, the installer has checked and if required, adjusted

the preset outlet temperature setting of an 864 series water

heater to 55°C.

Warning: Temperature controllers must not be fitted to

this water heater (864 series) as part of a solar water heater system installation because water at a

temperature much higher than the controller setting can be delivered. If a solar preheater has been installed

to an existing water heater installation, then all controllers must be disconnected and removed.

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

temperatures from 58°C up to 75°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 supplying hot water to an early childhood

centre,school,nursing home or a facility for young,aged,sick or disabled people.

An approved temperature limiting device supplying a fixed temperature of 45°C or less, to be fitted into the

hot water piping to the bathroom and ensuite when an 864 series water heater is installed

If no controllers are installed and the 864series preset outlet temperature setting has not be adjusted above

or is below 55°C There is no requirement in AS/NZS 3500.4 to fit a temperature limiting device if this water

heater is installed in other than an early childhood centre, school, nursing home or a facility for young, aged,

sick or disabled people.

EZ-LINK SYSTEM DUAL INSTALLATION

Two continuous flow 864 series gas water heaters installed in an Ez-LinkTM system dual installation

arrangement, when they are part of a circulated hot water flow and return system, can only have a Kitchen

controller installed shown on page

maximum Kitchen controller

tem

erature settin

864 series

maximum Bathroom controller

temperature setting 864 series

minimum Kitchen and Bathroom

controller temperature setting

ABOUT YOUR WATER HEATER

Warning

This water heater is only intended to be operated by persons who have the experience or the knowledge and

the capabilities to do so. This water heater is not intended to be operated by persons with reduced physical,

sensory or mental capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do

not interfere with the water heater.

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

fan. The removal of the front panel will expose 240 V wiring. It must only be removed by an authorised or

qualified person.

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

power plug with wet hands.

SAFETY

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

relief valve. These devices must not be tampered with or removed. The water heater must not be operated

unless each of these devices is fitted and is in working order.

If the power supply cord or plug is damaged, it must be replaced by an authorised 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 your nearest Rheem Service Department or Accredited Service Centre to arrange for an

inspection.

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

accordance with the Owner’s Guide and Installation Instructions.

The warranty can become void if relief valves or other safety devices are tampered with or if the

installation is not in accordance with these instructions.

•Do not store flammable or combustible materials near

the water heater. Flammable liquids (such as petrol),

newspapers and similar articles must be kept well away

from the water heater and the flue terminal.

•Do not use aerosols, stain removers and household

chemicals near the water heater whilst it is working. Gases

from some aerosol sprays stain removers and household

chemicals become corrosive when drawn into a flame.

•Do not store swimming pool chemicals, household

cleaners, etc., near the water heater.

•Do not place anything on top of the water heater or in

contact with the flue terminal. Ensure the flue terminal is not

obstructed in any way at any time.

•Do not use Propane / Butane gas mixtures in a Propane model. A Propane model is designed to operate

on Propane only. The use of Propane / Butane mixture, such as automotive LPG fuel, in a Propane

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

GENERAL MAINTENANCE

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

circumstances should abrasive materials or powders be used.

Condensate Trap

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

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

To check and / or refill a trap with water,. If a trap is dry or the water level is low, then a trap must be refilled.

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

line.

ABOUT YOUR WATER HEATER

TO TURN OFF THE WATER HEATER

If it is necessary to turn off the water heater:

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

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

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

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

conditions occurring (refer to note below).

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

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

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

off unless the water heater is drained, otherwise damage could result (refer to “Frost Protection” on page 8

and “Draining the Water Heater” on page 8).

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.

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

Installation requirements are shown on page 54. The water heater must be installed by an authorised

person. In New Zealand the installation must comply with Standards AS/NZS 3500.4 and NZS 5261 and all

local codes and regulatory authority requirements.

Warning: Temperature controllers must not be fitted to this water heater (864 series) as part of a solar

water heater system because water at a temperature much higher than the controller setting can be

delivered. If a solar preheater has been installed to an existing water heater installation, then all controllers

must be disconnected and removed.

The pipe work between the solar storage tank (if one is installed) and the gas booster water heater has a

minimum recommended pipe size of DN20, MUST BE of copper and is 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 gas booster water

heater.

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 heat exchanger and fittings. If you are in a known harsh water areayou must

read page 39.If you are not sure, have your water chemistry checked against the conditions described on

page 39.

ABOUT YOUR WATER HEATER

HOW LONG WILL THE WATER HEATER LAST?

There are a number of factors that will affect the length of service the water heater will provide. These

include the water chemistry, the water pressure, temperature (inlet and outlet) and the water usage pattern.

However, your water heater is supported by a comprehensive warranty (refer to page 96).

SERVICING

For safe and efficient operation, the water heater should be serviced annually by your nearest Rheem

Service Department or their Accredited Service Centre. Only genuine replacement parts should be used on

this water heater.

Warning: Servicing of a gas water heater should only be carried out by authorised personnel.

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 7.

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 warranty (refer to “Warranty Exclusions” on page 95).

•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 8).

•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 -20ºC

(including wind chill factor).

•Refer to “Warranty Exclusions” on page 95.

DRAINING THE WATER HEATER

•Turn off the water heater (refer to “Turn Off The Water Heater” on page 7).

•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.

TEMPERATURE CONTROL

CONTROLLERS

The Rheem 864 series can be installed with Rheem controllers to enable the user to control the temperature

of the delivered water from the outlet of the water heater. There are two families of Rheem controllers

suitable for installation with this water heater. These are the standard controllers and the Deluxe controllers.

Standard Controllers

There are three types of standard controller. They are the Kitchen controller (Rheem PN 299850),

Bathroom1 controller (Rheem PN 299851) and the Bathroom2 controller (Rheem PN 299852). The standard

controllers are suitable for use on all 864 series models.

The standard controllers are identified by a ‘K’ (Kitchen controller), ‘B1’ (Bathroom1 controller) or ‘B2’

(Bathroom2 controller) located on the front bottom left hand corner of the standard controller.

Deluxe Controllers

There are three types of Deluxe controller. They are the Kitchen Deluxe controller (Rheem PN 299858),

Bathroom1 Deluxe controller (Rheem PN 299859) and the Bathroom2 Deluxe controller (Rheem

PN 299860).

The Deluxe controllers are identified by a ‘K’ (Kitchen Deluxe controller), ‘B1’ (Bathroom1 Deluxe controller)

or ‘B2’ (Bathroom2 Deluxe controller), located under the front panel, to the bottom left hand corner adjacent

to the BATH FILL VOLUME label.

The Deluxe controllers offer additional functions to the standard controllers. These are:

•An assistance call function, which provides a voice prompt when pressed and will sound on all

controllers. This is useful should a family member require assistance when in the bathroom.

•A Bath Fill mode, which is designed to allow the water heater to deliver a selected volume of water at a

selected temperature. Bath filling takes place when the hot tap is opened. When the set volume has

been delivered, the water flow from the water heater ceases. Refer to “Bath Fill Mode” on page 30.

Note: The bath level should be monitored periodically while this function is in use to avoid the possibility

of the bath overflowing. The Bath Fill mode should also be used with caution until you are familiar with

its operation.

Warning: Baths should not be left unattended whenever young children are present.

Warning: Temperature controllers must not be fitted to this water heater (864 series) as part of a solar

water heater system because water at a temperature much higher than the controller setting can be

delivered. If a solar preheater has been installed to an existing water heater installation, then all controllers

must be disconnected and removed.

Notes:

•Where more than one controller is installed, the second or third controller must be of the same family.

•A standard controller can only be installed with another standard controller(s) and a Deluxe controller

can only be installed with another Deluxe controller(s). A standard controller(s) and a Deluxe

controller(s) cannot be connected to the same water heater.

•One, two or three controllers can be installed. Only one of each type of controller can be connected to

the water heater. Therefore, a maximum of three controllers only can be connected to each water

heater.

•A Bathroom2 controller can only be installed if a Bathroom1 controller is installed and a Bathroom2

Deluxe controller can only be installed if a Bathroom1 Deluxe controller is installed.

•Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater.

TEMPERATURE CONTROL – STANDARD

STANDARD CONTROLLER FUNCTIONS

If one or more controllers are installed, at least one must be on for the water heater to operate. If all

controllers are off, the water heater will only deliver cold water.

on / off button – This button must be pressed once to turn on the controller.

A controller cannot be turned on if water is flowing from a hot tap.

To turn off a controller, press the on / off button once. The light will go out.

A controller can be turned off whilst water is flowing.

on / off operating light – The light in the on / off button will glow when the controller is turned on.

The light will go out when the controller is turned off.

priority light – This light will glow on a controller when that controller has priority.

The Bathroom controller(s), if they are turned on, have priority over the Kitchen

controller.

Priority means that controller has control of the water heater temperature setting.

The water temperature setting can only be adjusted by the controller that has priority.

in use light – This light will glow on all controllers, whether they are on or off, when hot water is

flowing, regardless of which controller has priority.

display panel – The current temperature setting is displayed on all controllers (whether hot water is

flowing or not), when any controller is on.

If all controllers are off, then the display remains blank.

The water volume can also be displayed on the Kitchen controller. The x10lsymbol

glows when the water volume is displayed.

i(up button) – The up button increases the temperature setting (refer to “Temperature Adjustment –

Standard Controller” on page 13).

j(down button) – The down button decreases the temperature setting (refer to “Temperature

Adjustment – Standard Controller” on page 13).

water volume button (Kitchen controller only) – This feature enables an alarm to sound when a set volume

of water has flowed through the water heater (refer to “Water Volume Function –

Standard Controller” on page 18).

water volume operating light – The light in the water volume button will glow when the water volume button

is pressed and the water volume mode is turned on.

The light will go out when the water volume button is pressed and the water volume

mode is turned off.

water volume symbol – The x10lsymbol below the display panel glows when the water volume mode is

turned on and the water volume is displayed.

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