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Gas Water Heaters

TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION Open/Close
  • Normal Operation
    No water should be present; it is only under fault conditions that it will operate.
     

If water is present/flowing please contact your nearest Rheem service centre.

EXPANSION CONTROL VALVE Open/Close

If an expansion control valve is fitted in the cold water line to the water heater, it may discharge a small quantity of water, throughout the day, this is both normal and expected.

NOT ENOUGH HOT WATER (OR NO HOT WATER) Open/Close
  • Check the pilot flame is burning by viewing through the opening in the top of the front cover (indoor models) or by removing the access cover (outdoor models). Relight the pilot flame according to the instructions on the inside of the access cover.
     
  • Do you have the correct size water heater for your requirements? The sizing guide in the sales literature suggests average sizes that may be needed.
     
  • Is one outlet (especially the shower) using more hot water than you think? Carefully review the family's hot water usage. Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage.
     
  • Ensure thermostat setting is appropriate.
     
  • You may choose to adjust the thermostat upwards to gain additional hot water capacity.

CAN'T LIGHT THE PILOT FLAME Open/Close

 

  • Is there a normal gas supply to the rest of the house? Try lighting another gas appliance to check. If no gas, call the gas supply authority. If there is, please contact your local Rheem Service Centre.

HIGH GAS BILLS Open/Close

 

  • Is one outlet (especially the shower) using more hot water than you think?
     
  • Is there a leaking hot water pipe, dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and gas.
     

WATER HEATER APPEARS TO BE LEAKING Open/Close
When the water heater is first lit, or after a large usage of hot water, condensation may form on the burner and grille of the water heater. This is quite normal, especially in winter months, and will dry off as the water is heated. In the case of Rheem Stellar outdoor models, the plastic drain near the bottom of the water heater will drip water during the heating cycle. It is possible for several litres a day of condensation to discharge from the drain, especially in cool conditions. The water is not from the mains supply, but is condensation caused by the efficient operation of the water heater.

Rheem Stellar ‘Smoke’ coming from vent. Open/Close

On cool days it is common to see clouds of water vapour coming from the flue of the Rheem Stellar when in operation. This may be mistaken for smoke. The Stellar’s high efficiency this is why the flue gases and vapour are visible. This is not a fault.

Condense also forms in the flue and is discharged from a small pipe on the left side of the cylinder at the base. This is not a water leak.

Internal cylinders (441135 and 441170.) Open/Close

During heavy use or in cold atmospheric conditions large amounts of condense can form in the flue. This condense will run down the flue and can be seen on the top of the water heater.  This is not a water leak.

Also during operation hissing can be heard as water condense drips onto the burner. Again, this is normal operation and not a water leak.

Maintenance Open/Close

Rheem recommend for safety and maximum efficiency that your gas appliance is serviced yearly.

Valve manufacturers recommend that you operate the easing lever on the Temperature and Pressure Relief valve once every six months. It is very important that you raise and lower the lever gently.

Electric Water Heaters (Hot Water Cylinders)

TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION Open/Close

 

  • Normal Operation
    No water should be present; it is only under fault conditions that it will operate.
     

If water is present/flowing please contact your nearest Rheem service centre.

NOT ENOUGH HOT WATER (OR NO HOT WATER) Open/Close
  • Is the electricity switched on? Check the switch marked "water heater" at the switchboard and the isolating switch, if one is installed, near the water heater.
     

Note: Where the water heater is connected to an "OFF-PEAK" or controlled electrical tariff, the supply may not be available at certain times of the day.
 

  • For Twin element non-simultaneous models, power must be available to top circuit at all times for this water heater to operate as designed.
      
  • Do you have the correct size water heater for your requirements? The sizing guide in the sales literature suggests average sizes that may be needed.
     
  • Is one outlet (especially the shower) using more hot water than you think? Carefully review the family's hot water usage. Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage.
     
  • Ensure thermostat setting is appropriate.
     
  • You may choose to adjust the thermostat upwards to gain additional hot water capacity.

HIGH ELECTRICITY BILLS Open/Close

 

  • Is one outlet (especially the shower) using more hot water than you think?
     
  • Is there a leaking hot water pipe, dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and electricity.
     
  • Replace faulty tap washers, and have your plumber rectify any leaking pipe work.

EXPANSION CONTROL VALVE Open/Close

 

If an expansion control valve is fitted in the cold water line to the water heater, it may discharge a small quantity of water, throughout the day, this is both normal and expected.

NO HOT WATER? Open/Close

Check with your power supplier that the electricity supply hasn’t had an interruption.

Check that the fuse hasn’t blown or trip switch needs resetting

Check the cylinder isolation switch hasn’t been knocked to the off position.

A low pressure cylinder may have a safety vent pipe extended through the roof. Check that water is not flowing from the pipe. If water is flowing from this pipe, call your Rheem Service Centre or a registered plumber. This fault is also associated with a large increase on your power bill.

A mains pressure cylinder has a pressure and temperature relief valve. If this valve fails water will pass through the cylinder and is discharged out of this pipe. If water is flowing from this pipe, call your Rheem Service Centre or a registered plumber. This fault is also associated with a large increase on your power bill.

Temperature adjustment? Open/Close

Only the Optima range of Rheem electric cylinders has a customer adjustable thermostat. The remainder of the range should only be adjusted by a qualified electrician, or licensed plumber. The range of the thermostat is 60°C to 75°C on domestic cylinders. It is a New Zealand Building Code requirement that water is stored above 60°C, this is why our thermostats cannot be adjusted below this temperature.

Maintenance Open/Close

Mains pressure cylinders only. The cylinder requires little maintenance. Valve manufacturers recommend that you operate the easing lever on the Temperature and Pressure Relief valve once every six months. It is very important that you raise and lower the lever gently. In normal water areas the anode condition should be inspected every 8 years. For softened water supplies or in areas of poor water quality, it is recommended the anode be inspected 3 years earlier than shown.

Low Pressure cylinders only. Check any pressure control valve as per the valve manufacturer’s instructions.

Sudden increase in your Electricity bill? Open/Close

If your hot water usage pattern has remained the same, check under the heading of No Hot Water. The increase on your power bill could be attributed to losing water through a safety valve.

Solar Water Heaters

TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION Open/Close
  • Normal Operation
    No water should be present; it is only under fault conditions that it will operate.
     

If water is present/flowing please contact your nearest Rheem service centre.

EXPANSION CONTROL VALVE Open/Close

 

If an expansion control valve is fitted in the cold water line to the water heater, it may discharge a small quantity of water, throughout the day, this is both normal and expected.

NOT ENOUGH HOT WATER (OR NO HOT WATER) Open/Close

This can occur with new installations and is normally related to some misunderstandings as to the use of the auxiliary heating unit.

  • If there is insufficient Sunlight
    Insufficient sunlight due to cloudy weather during summer months or poor solar energy contribution in winter months will allow the Rheem Premier Solar will automatically switch to auxiliary backup.
  •  
  • Excessive Water Usage
    • Are you using more hot water than you think?
      Very often it is not realised the amount of hot water used, particularly when showering. As you have installed an energy saving appliance, energy saving must also be practised in your home. Adjust your water usage pattern to take advantage of maximum solar gains
    •  
    • Collector Shaded
      If trees or other objects shade the collectors or if the glass is dirty the effectiveness of the collectors will be greatly impaired. Lop trees, or clean collector glass.
       

WATER IS NOT HOT ENOUGH Open/Close

It may be found, due to heavy hot water demand patterns or poor solar energy gains, water temperature may be lower than normally expected.  Auxiliary heating will operate during this period.

HIGH ELECTRICITY BILLS Open/Close

Maximum electrical energy saving can be achieved with careful planning of hot water usage.
 

Should you, at any time, feel your electricity account for hot water is too high, we suggest you check the following points: 

  • Are you using more hot water than you think?
     
  • Are any of your hot water taps dripping or hot water pipes leaking? Even a small leak can waste a surprising amount of hot water. Replace faulty tap washers, and have your plumber rectify any leaking pipe work.
     
  • Consider if you have recently increased your hot water usage and check if there has been any increase in electricity tariffs since the last account.
     The electricity tariff to which your solar water heater is connected, will play an important role in the overall effectiveness of the system. It is important that you are aware of this tariff to enable you to take full advantage of the boosting period, i.e. Domestic/Continuous, Off Peak, Extended Off Peak. For types of tariffs, refer to "How Your Water Heater Works" in the Domestic Solar Owner's Guide and Installation Booklet.

WHAT IS THE DIFFERENCE BETWEEN A PREMIER AND A SOLAR CYLINDER? Open/Close

The difference between a premier solar cylinder and a solar tank is that the premier solar cylinder is indirect (the hot water and glycol collector fluid do not mix). The solar tank is a direct cylinder where the water is the same that is in the hot water cylinder (it mixes).

IS A LOW PRESSURE CYLINDER COMPATIBLE FOR SOLAR? Open/Close

A low pressure cylinder is not suitable for a (Rheem direct) solar application for several reasons, one being because the cylinders max working pressure is below the min working pressure of the solar system (e.g. 122 KPA and 200 KPA respectively) thus connecting the two will make the tank fail. 

CAN A MAINS PRESSURE CYLINDER BE USED IN A SOLAR OR WETBACK SYSTEM? Open/Close

A mains pressure cylinder can `Technically `be used in a wetback or solar system if the operating temperature of the heat source is controlled to a level suitable for use with the cylinder,  however it is not recommended.

Heavy Duty Electric Water Heaters

TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION Open/Close

 

  • Normal Operation
    No water should be present; it is only under fault conditions that it will operate.
     

If water is present/flowing please contact your nearest Rheem service centre.

EXPANSION CONTROL VALVE RUNNING Open/Close

 

If an expansion control valve is fitted in the cold water line to the water heater, it may discharge a small quantity of water, throughout the day, this is both normal and expected.

NOT ENOUGH HOT WATER (OR NO HOT WATER) Open/Close
  • Is the electricity switched on? Check the switch marked "water heater" at the switchboard and the isolating switch, if one is installed, near the water heater.

Note: Where the water heater is connected to an "OFF-PEAK" or controlled electrical tariff, the supply may not be available at certain times of the day.

  • Do you have the correct size water heater for your requirements? The sizing guide in the sales literature suggests average sizes that may be needed.
     
  • Are outlets (especially the showers) using more hot water than you think? Carefully review the family's hot water usage. Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage.
     
  • Ensure thermostat setting is appropriate.
     
  • You may choose to adjust the thermostat upwards to gain additional hot water capacity.

HIGH ELECTRICITY BILLS Open/Close

 

  • Is one outlet (especially the shower) using more hot water than you think?
     
  • Is there a leaking hot water pipe, dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and electricity.
     
  • Replace faulty tap washers, and have your plumber rectify any leaking pipe work.

Heavy Duty Gas Water Heaters

TEMPERATURE AND PRESSURE RELIEF VALVE OPERATION Open/Close

 

  • Normal Operation
    No water should be present; it is only under fault conditions that it will operate.

If water is present/flowing please contact your nearest Rheem service centre.
 

EXPANSION CONTROL VALVE Open/Close

 

If an expansion control valve is fitted in the cold water line to the water heater, it may discharge a small quantity of water, throughout the day, this is both normal and expected.

NOT ENOUGH HOT WATER (OR NO HOT WATER) Open/Close
  • Check the pilot flame is burning by viewing through the opening in the top of the front cover (indoor models) or by removing the access cover (outdoor models). Relight the pilot flame according to the instructions on the inside of the access cover.
     
  • Do you have the correct size water heater for your requirements? The sizing guide in the sales literature suggests average sizes that may be needed.
     
  • Is one outlet (especially the shower) using more hot water than you think? Carefully review the family's hot water usage. Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage.
     
  • Ensure thermostat setting is appropriate. You may choose to adjust the thermostat upwards to gain additional hot water capacity.

CAN'T LIGHT THE PILOT FLAME Open/Close
  • Is there gas to the water heater? Check the isolating valve in the gas line is "on".
     
  • Is there a normal gas supply to the rest of the house? Try lighting another gas appliance to check. If no gas, call the gas supply authority. if there is please contact your nearest Rheem Service Centre.

HIGH GAS BILLS Open/Close

 

  • Is one outlet (especially the shower) using more hot water than you think?
     
  • Is there a leaking hot water pipe, dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and gas.
     
  • Replace faulty tap washers, and have your plumber rectify any leaking pipe work.

WATER HEATER APPEARS TO BE LEAKING Open/Close

When the water heater is first lit, or after a large draw off of hot water, condensation may form on the burner and grille of the water heater. This is quite normal, especially in winter months, and will dry off as the water is heated.

BURNER WILL NOT LIGHT Open/Close

 

  • Is there gas to the water heater? Check the isolating gas cock on the gas supply line is turned "on". Try lighting another gas appliance. If there is no gas, call the gas supply authority. If there is please contact your nearest Rheem Service Centre.

Lazer Boiling Water Unit

IF WE HAD 30 STAFF MEMBERS WHAT SIZE LAZER WOULD YOU RECOMMEND? Open/Close

To size the Lazer (capacity) required to supply hot water to 30 people (with 30 consecutive fills) you can calculate that each person has a 200ml (average) cup x 30 (persons) = 6 litres, as a 6 litre is not made, so we use the next size up, the 7.5 litre Lazer.

Temperature

HOW DO I TURN DOWN MY CYLINDER TEMPERATURE? Open/Close

Most cylinders thermostat temperature range is between 60 and 75 °C, the lowest temperature a cylinder should store water at is 60 °C, this destroys legionnaire’s bacteria and is a legal requirement under the building code. Those authorised to alter the temperature of a cylinder is by someone with an electrical license. A tempering valve is an adjustable device fitted to the pipe work which limits the temperature of the hot water from the cylinder to ablution areas in a range between 35 – 55 degree Celsius (the legal maximum) and is home owner adjustable.

HOW DO I TURN MY ELECTRIC HOT WATER CYLINDER DOWN TO 55°C? Open/Close

 Most cylinder thermostats do not go below 60°C and cannot therefore be turned down to 55°C.

Warranty

WHAT IS THE WARRANTY PERIOD ON MY CYLINDER? Open/Close

 The warranty on cylinders varies with models. We have a reference chart for all warranty periods.

DO I NEED TO SERVICE MY CYLINDER AND WHY? Open/Close

Both gas and electric cylinders require servicing to ensure they are working safely and efficiently, for example correct working pressures and settings are checked and adjusted, signs of damage, condition of wiring, anode inspection, cold water expansion and TPR* valves operated (6 monthly by home owner*). Also whether the installation complies with codes and standards etc. It is recommended that appliances are checked yearly.

HOW LONG SHOULD A HOT WATER CYLINDER LAST FOR? Open/Close

 A hot water cylinder`s lifespan is governed by many factors ranging from frequency of use, water quality, pressure and velocity, thermostat settings, number of heating cycles, adherence to installation criteria, pulsation, regular maintenance etc, the list of factors is large. The durability requirements for cylinders as set out in the NZ building code are met when installed in accordance with the building code and Rheem’s installation instructions.            

General Questions

WHAT IS THE DIFFERENCE BETWEEN MAINS PRESSURE AND LOW PRESSURE? Open/Close

 The difference between mains and low pressure is the pressure that water is supplied at, for example a low pressure system (e.g. tank supply) may supply water at 50 KPA. This system could include a 7.6m `metres head` pressure rated low pressure cylinder (76 KPA). Mains pressure (from the street) may supply water at 800 KPA. This system could include a cylinder working pressure range of 350/500 KPA or more (pressure limiting valves are used to `limit` the pressure to a cylinder).

WHAT IS THE DIFFERENCE BETWEEN SIMULTANEOUS AND NON – SIMULTANEOUS? Open/Close

 The difference between simultaneous and non simultaneous operation in regards to a twin element cylinder is that a simultaneous cylinder has both elements operating at the same time (wired together), non simultaneous has two  elements which do not operate at the same time e.g. one thermostat can be wired directly to the standard day rate supply, whilst the second is wired to an overnight tariff ripple control supply (discounted rate)

HOW OFTEN AND WHY DO I RELEASE THE TEMPERATURE AND PRESSURE RELIEF VALVE? Open/Close

 

The TPR valve should be operated 6 monthly, this ensures that it works correctly and that the valve pipe work to the drain is not blocked.

DO I NEED A CYLINDER WRAP? Open/Close

All new Rheem cylinders manufactured after 2002 are pre- insulated using an injected expanding foam product applied at the factory, this makes further aftermarket `wrapping` unnecessary.

MY CYLINDER IS NOT WORKING WHO DO I GET TO FIX IT? Open/Close

If a request is made to make a repair we always recommend our Rheem Service Centres.

WHAT IS MORE ECONOMICAL GAS OR ELECTRIC? Open/Close

Unfortuneately this question has so many variables e.g. LPG or NG, day rate or low tariff night rate, solar or heat pump, volume of hot water required, location, frequency of demand, efficiencies, etc that without more specific information a comparison cannot be made and this cannot be answered, gas however is more environmentally friendly.  Used directly, however many electricity companies can now supply 'green' electricity.

CAN THE CONNECTION SIZE OF A MAINS PRESSURE ELECTRIC CYLINDER BE INCREASED FROM 20 MM? Open/Close

None of the connection sizes on the cylinders can be increased.

Heat Pump

CAN YOU INSTALL A HEAT PUMP INSIDE A HOUSE OR HORIZONTALLY? Open/Close

You cannot install a heat pump inside a house as there will be insufficient warm air supplying the unit as the exhaust cools to around 5 °C thereby reducing the temperature of the room, making the principle of heat extraction from air redundant. A heat pump cannot be installed horizontally only vertically.

WHAT IS BETTER HEAT PUMP OR SOLAR? Open/Close

What’s better, heat pump or solar can only be answered by asking, in what regard?, as they are both very good products, and each having specific applications regarding installations, more site specific information is required.

Continuous Flow Gas Hot Water / Integrity

Error codes Open/Close

Error 11 means the unit failed to ignite. Check the gas supply is turned on, or if supplied by bottles, check the bottles are full and the change over valve is on ‘auto’.

Error 12 means the unit lit, but the flame was extinguished. Check the gas supply is turned on fully, or if supplied by bottles, check the bottles are full and the change over valve is on ‘auto’.

Whistling noise Open/Close

A whistling or trumpeting noise can be caused by low gas levels in the LPG bottles, or failing gas regulator. Check the bottles are full and the change over valve is on ‘auto’.

No hot water Open/Close

Check that the power supply hasn’t been interrupted.

If you have had a power cut, and the power has been restored to your property, if you have temperature controllers you will have to switch them on, they do not automatically switch on when the power is restored.

Servicing Open/Close

Rheem recommend for safety and maximum efficiency that your gas appliance is serviced yearly.