Trade FAQ's / Trouble Shooting Toolbox

Bosch offers training on the installation and operation of our water heaters at times throughout the year. We have a training centre in Melbourne and at periods throughout the year we will travel to different states and regions.

Bosch also offers online training courses.

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Please register your interest by telephoning Bosch on 1300 307 037 or by clicking on this link and register your interest.

The installing plumber should listen to the customer feedback regarding the issues experienced. Many issues can be caused by the installation and application of the water heater and these include gas supply, water pressure, lack of commissioning of the appliance and poor location of the water heater.

The installing plumber should decide if they need to attend and inspect the units operation.

If they are confident that the installation is correct and the issue is most likely a product defect then they should advise the customer to make contact with Bosch on 1300 30 70 37 to request a warranty inspection.

Customers could also refer to the operating manuals for the product to understand the operation of the product.

User Manuals

Customers should also be referred to the Customer FAQ’s which may help to answer questions regarding the product.

Customer FAQ's

Commissioning and user operating video content is available and can be found on the Bosch climate website at this link.

Video Support

Or can be found at the Bosch YouTube channel at this link.

YouTube Channel

The warranty covers manufacturing issues related with the product and there will be no charge for parts and labour. If the issue is related to Installation faults or poor gas/water supply then charges will apply. User errors are not manufacturing faults and are not covered by the warranty.

For full warranty details please refer to our warranty document at this link.

Warranty Document

Yes. Any installation of a gas appliance requires a certificate of compliance to be provided to the householder.

The gas supply line needs to be sized in accordance with AS/NZS5601.1 (Gas installation standard). Factors that need to be considered are the total Mj/h capacity of each appliance connected to the gas line (for example 21E…, 26E…, 16H…. the length of each section or junction to junction) and the type of piping used including pressure drop factor.

For natural gas, the gas meter size should be inspected to ensure the total capacity is not exceeded (typically past 6 cubic meters).

For LPG, gas regulators should be sized to pass the maximum load of all gas appliances connected to the system and the size and number of LPG cylinders calculated to ensure effective operation.

Please refer to the customer FAQ’s for additional information on LPG questions.

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In most domestic water supplies in New Zealand, Bosch hot water units are suitable, however in areas with poor quality water, for example bore water, Bosch water heaters may not be suitable.

Customer operating and installation manuals include a water quality statement.

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Full flow water isolating valves should be installed on the cold water inlet to the appliance. Duo valves or valves with a non-return function must not to be used.

Pressure limiting or pressure reduction valves should only be installed on the cold water supply line not less than 3 meters before the appliance. Pressure limiting and pressure reduction valves should ideally be installed on the main cold supply after the water meter to ensure equal pressure for both hot and cold water.

High performance tempering valves should not be installed any closer than 1 meter to the water heater to allow adequate mixing.

Pressure limiting valves should be installed where the measured water pressure is within 30% of the maximum rating of the appliance, for example, if the maximum pressure for a water heater is 1000kpa, a pressure-limiting valve is suggested if the water pressure is above 700kpa.

However most tapware has a maximum rated pressure of 500 kpa so good plumbing practice would be to install a 500 kpa pressure limiting valve on the household cold water supply which protects all plumbing fixtures and the water heater.

The pressure limiting valve should be installed no closer than 3 meters from the appliance. They are required to be installed to protect the appliance, however, installing on the main cold water supply line after the water meter ensures hot and cold water lines are at the same pressure. This also protects other water fixtures and appliances.

The Bosch HydroPower, Compact and Pilot series are not suitable to be used as a booster for storage tanks or solar systems as they do not monitor the incoming water temperature, overheating and damage to the appliance may occur.