Rinnai EHF50S36 Operating Instructions

This appliance shall be installed in accordance with:

• Manufacturer’s Installation Instructions

• Municipal Building Codes

• AS/NZS 3000 Wiring Rules

• AS/NZS 3500.4 Plumbing and Drainage

• Any other local relevant Statutory Regulation

AS3498 Lic WMKA 21244

Operation & Installation Manual

‘HOTFLO®’ (HFE Series)

Mains Pressure Vitreous Enamel

Electric Storage Water Heater

REGULATORY INFORMATION

Your Rinnai Hotflo Mains Pressure Vitreous Enamel Electric Storage Water Heater has been certified by relevant plumbing and electrical authorities and the details are shown on data plate.

This appliance must be installed correctly by an authorised person and must conform to location regulations.

The installation must also comply with the instructions supplied by Rinnai.

Please keep this instruction booklet in a safe place for future reference.

Notice to Victorian Consumers

This appliance must be installed by a person licensed with the Plumbing Industry Commission. Only a licensed person will have insurance protecting their workmanship. So make sure you use a licensed person to install this appliance and ask for your Compliance Certificate. For further information contact the Plumbing Industry Commission on 1800 015 129.

WARNINGS

Installation and service only by an authorised person.

• DO NOT operate this system before reading the manufacturer s instr u ctio ns

• DO NOT place articles on or against this appliance

• DO NOT store chemicals or flammable materials near this appliance

• DO NOT operate with panels or covers removed from this appliance

• DO NOT activate heating elements unless cylinder is full of water

• DO NOT touch any power supply cords, plugs or electrical conduits with wet hands.

Removal of access covers will expose 240V wiring. Access covers to be removed by authorised persons only. This water heater is not intended to be operated or adjusted by young children or infirm persons. Young children

must be supervised to ensure they do not interfere with the water heater. If the power supply cord, plug or electrical conduit to the water heater is damaged, it must be replaced by an

authorised person in order to avoid a hazard, using genuine replacement parts available from Rinnai.

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TABLE OF CONTENTS

REGULATORY INFORMATION.................................................................................................................................. i

WARNINGS ................................................................................................................................................................. i

Hydrogen Gas.... ... .... ...................................... .... ... ... ... ... .... ...................................... .... ... ...................................... 1

Water Temperature................................................................................................................................................ 1

IMPORTANT INFORMATION .................................................................................................................................... 1

SAFETY...................................................................................................................................................................... 1

SAFETY DEVICES ............................................................. ... ... ... .... ... ... ... .... ... ... ................................................... 2

ANODE .................................................................................................................................................................. 2

WATER QUALITY.................................................................................................................................................. 2

TURNING ‘OFF’ THE WATER HEATING SYSTEM.............................................................................................. 2

TURNING ‘ON’ THE WATER HEATING SYSTEM................................................................................................ 2

HOW THE WATER HEATER WORKS.................................................................................................................. 2

TWIN ELEMENT MODEL...................................................................................................................................... 2

REGULAR CARE................................................................................................................................................... 3

Over flow tray and drain......................................................................................................................................... 3

Pressure and Temperature Relief (PTR) Valve ..................................................................................................... 3

Expansion Control Valve (ECV) if fitted ................................................................................................................. 3

SAVE A SERVICE CALL ....................................................................................................................................... 4

LACK OF HOT WATER OR NO HOT WATER ..................................................................................................... 4

HIGH ELECTRICITY BILLS................................................................................................................................... 4

SERVICING AND REPAIR......................................................................................................................................... 4

WATER HEATER VALVES DISCHARGING EXCESSIVELY ............................................................................... 5

SERVICE ............................................................................................................................................................... 5

INSTALLATION DIAGRAMS ................................................................................................................................. 6

Figure 1 - Typical Installation of Water Heater .................................. ................... ................ .................... ............ 6

Figure 2 - Hot Water Plumbing System Example - No Temperature Limiting Device .......................................... 6

GENERAL INSTALLATION ....................................................................................................................................... 6

Figure 3 - Hot Water Plumbing System Example - with Temperature Limiting Device (TLD) .............................. 7

Figure 4 - Hot Water Plumbing Water Heater system Example - with Flow & Return Pipe Work ........................ 7

Figure 5 - Hot Water Plumbing System Example with Flow and Return Pipe Work and TLD ............................. 8

WATER HEATER LOCATION ............................................................................................................................... 8

WATER QUALITY.................................................................................................................................................. 9

HOT WATER STORAGE AND DELIVERY TEMPERATURES............................................................................. 9

Storage Temperature............................................................................................................................................. 9

Sanitary Fixtures Delivery Temperature................................................................................................................. 9

Water Pipes............................................................................................................................................................ 9

Electrical Supply................................................................................................................................................... 10

Valves and fittings................................................................................................................................................ 10

PLUMBING CONNECTIONS.......................... .... ... ... ... .......................................... ... .... ... ................

PTR Valve Connection................................. ... .......................................... ........................................................... 11

Expansion Control Valve (ECV)........................................................................................................................... 11

Drain Lines...... ... ... .... ... ....................................... ... ... ... ... .... ... ... ........................................................................... 11

ELECTRICAL CONNECTIONS

Figure 6 - Single and Twin Elements Wiring Diagrams .................................................................................. 12

Thermostat Setting............................................................................................................................................... 12

To fill and turn ‘ON’ the water heater ................................................................................................................... 13

To turn ‘OFF’ the water heater............................................................................................................................. 13

Draining................................................................................................................................................................ 13

COMMISSIONING .................................................................................................................................................... 13

Figure 7 - Dimensional Drawing .......................................................................................................................... 14

SPECIFICATIONS.................................................................................................................................................... 14

Table 1 - Specifications .................................................................................................................................... 15

CONTACT INFORMATION ...................................................................................................................................... 18

.......................................................................................................................... 11

.................... 11

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NOTE

SAFETY

Hydrogen Gas

If the hot water heater is not used for two weeks or more, a quantity of hydrogen gas, which is highly flammable, may accumulate in the water heater. To dissipate this safety, it is recommended that a non electrically operated hot tap be turned on for several minutes at a sink, or bath, but not at dishwasher or other appliance. During this procedure there must be no smoking, open flame or any electrical appliance operating nearby. If hydrogen gas is discharged through the tap, it will probably make a sound like air escaping.

Water Temperature

To meet regulatory requirements the temperature of stored water heater must not be less than 60°C. The thermostat on your water heater is factory pre-set to 65°C which is suitable for the vast majority of domestic

applications. The thermostat setting can be adjusted between 60°C and 75°C by an electrician or other su itably qualified trad es

person.

• The thermostat setting must only be adjusted by an Electrician or other suitably qualified trades person.

• The access cover to the element and thermostat must only be removed by an Electrician or other suitably qualified trades person.

IMPORTANT INFORMATION

• Do stay with children whenever

they are in the bathroom (Take the phone off the hook).

• Do take them out of the bathroom if

you need to answer the phone or door.

• Do test the temperature of the

water with your elbow before placing your child in the bath.

• Do make sure that the tap is turned

off tightly.

• Do install a child proof tap cover

• Do install a child resistant tap.

Hot Water can cause scalds.

Children, disabled, and the elderly are at the highest risk of being scalded.

Feel water temperature before bathing or showering.

Scalds from hot water taps can result in severe injuries to young children.

Scalds can occur when children are exposed directly to hot water when they are placed into a bath which is too hot.

• Consider child-resistant taps or tap

covers, which prevent a small hand being able to turn on the tap.

• Consider installing tempering

valves or thermostatic mixing valves which reduce the hot water temperature delivered to taps. Y our local plumbing authority may already require that these be fitted. Contact your installer or local plumbing authority if in doubt.

DON’T

• DON’T leave a toddler in

the care of another small child. The older child may not have set the water temperature to a safe level.

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WARNING

IMPORTANT INFORMATION

SAFETY DEVICES

For safe operation this water he ater is fitted with a combination Pressure & Temperature Relief (PTR) Valve, a thermostat and an over-temperature cutout for each heating element.

• DO NOT tamper with or remove safety devices.

• DO NOT operate this water heater unless all safety devices are fitted and in working order.

• DO NOT block or seal the PTR Valve and drain pipe.

ANODE

The water heater is fitted with a sacrificial anode to extend it's life. It will slowly dissipate whilst protecting the cylinder. The life of the water heater may be exten ded by arranging for an authorised person to inspect the an ode and replace it if required. It is recommended that the anode be inspected at least every 5 years.

The factory fitted Rinnai anode is Magnesium based. This anode is suitable when the total dissolved solids (TDS) content in the water supply does not exceed 600 mg/L, which is the case in most areas. In areas where the total dissolved solids (TDS) content in the water supply exceeds 600 mg/L the Rinnai Aluminimum based alloy is required.

WATER QUALITY

The water quality of most public supplies is suitable for the wate r heating system. The water quality from bore wells is generally unsuitable for the water heating system. Refer to the 'Warranty Conditions' for water quality parameters and how they affect the warranty conditions. If in doubt about the water quality, have it checked against the parameters listed in the warranty conditions.

If sludge or foreign matter is present in the water supply, a suitable strainer filter should be incorporated in the water supply to the system.

TURNING ‘OFF’ THE WATER HEATING SYSTEM

If you plan to be away for only a few nights, we suggest you leave the water heating system switched on. If it is necessary to switch off the water heater, the switch is usually marked and located in the electricity meter box of the dwelling.

TURNING ‘ON’ THE WATER HEATING SYSTEM

Switch on the electric supply to the heating element. The switch is usually marked and located in the electricity meter box of the dwelling. Water heating will now occur as required. It may take a number of hours before hot water is available.

HOW THE WATER HEATER WORKS

SINGLE ELEMENT MODEL

This model has one electric heating element with its own thermo stat. A vitreous e nam el lined stee l cylinde r stor es water which is heated by an heating element located at the base of the cylinder. Its own automatic thermostat controls the water temperature. The water heater connects directly to the mains water supply.

The heating element can be connected to a Continuous or Off-Peak electricity supply. The continuous supply is appropriate when the water heater capacity is less than the daily usage of hot water. The Off- Peak supply is appropriate when the water heater capacity exceeds the daily usage of hot water. The Off-Peak supply allows heating only for set periods and a volume of water sufficient for daily usage is heated during the set period and stored. The Off-Peak supply is usually cheaper. Electricity supply types and tariffs vary according to the local electricity authority.

TWIN ELEMENT MODEL

This model has two heating elements, each with its own thermostat. A vitreous enamel lined steel cylinder stores water which is heated by a heating element located at the base of the cylinder and the other near the top. Its own automatic thermostats control the water temperature.

The bottom heating element heats the whole contents of cylinder and Top heating element (booster) only operates during the high demand periods to heat the upper portion of the contents of the cylinder.

The two heating element are wired for non-simultaneous operation, so that only one heating element can operate at a time. The bottom heating element can be connected to an off-peak electricity supply, and the top heating element to a continuous electricity supply.

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WARNING

IMPORTANT INFORMATION

REGULAR CARE Over flow tray and drain

The overflow tray and drain (if fitted) should be periodically checked to ensure there are no blockages.

Pressure and Temperature Relief (PTR) Valve

This valve is located near the top of the water heater and is essential for safe operation. It is normal for the valve to release a small quantity of water through the drain line during heating. However, continuous leakage of water from the valve and its drain line may indicate a problem with the water heater.

• Never block the outlet of the PTR valve or its drain line for any reason. The easing gear must be operated at least once every six months or more frequently in areas with a high incidence of water deposits. It is very important you raise and lower the easing gear gently.

• Failure to do this may result in the water heater cylinder failing or under certain circumstances, exploding.

• If the valve does not discharge water when the easing gear lever is lifted, or does not seal again when the easing gear is closed, attendance by an authorised person must be arranged without delay. The PTR valve is not serviceable.

Expansion Control Valve (ECV) if fitted

Operate the easing lever on the expansion control valve once every six months. It is very important you raise and lower the lever gently.

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