Another successful LPG installation onto a Rheem 27 instantaneous hot water heater. The purple bin which is holding up a 9KP LPG cant be missed and is currently only a temporary solution to test the system until the 45KG bottles arrive which will be standing on a concrete base as per the gas standard.

In this artcle I wish to discuss the commissioning of LPG cylinder systems.

The commissioning of LPG cylinders must meet the same requirments of NZS 5601. However, special methods and precautions are required due to the special characteristics of LPG and its equipment.

The special requirements of LPG installation commissioning relate, for example to the relative density of LPG and its storage as liquid. Special purging methods must be used for LPG and sufficient ambient heat to boil the liquid gas.

Special LPG equipment includes fixed and mobile installations including single cylinder, twin packs, or cylinder banks. Systems may have auto-changeover regulators, which may include automatic ordering features.

NZS 5601 includes references to commissioning gas installations which requires every part of a gas installation to be commissioned and certified.

If you are getting quotes for gas water heating its important to make sure the installers are registered gasfitters. Even qualified trades people make mistakes so also very important to check with the installer that all commissioning requirements have been met.

Hot water cylinders LTD have several gas water heating specials which includes supply and installation. For more details please call us on 0800 429 546 or email gas@hotwatercylinders.nz

In this picture you can see two old gas powered Ruud hot water cylinders. The flues have been installed without a down draft diverted using a powered flue to remove products of combustion. These  cylinders have lasted 10 years and its amazing to see that both show the same signs degradation. The most challenging part of this job is that the cylinders have been installed in the worse place possible. Down three sets of stairs in a lower level that is over 300 meters away from vehicle access. It will be a logistical challenge! The job description is to remove the two gas powered cylinder and replace with one storage tank which will include a heat exchanger powered by a system 24KW system boiler. The storage tank will allow us to maintain the existing plumbing arrangement which also includes a ring main. The new system will be saving on operating and maintenance costs straight away! The old powered flue can also be removed as the new unit comes with a compact flue arrangement that can routed as required. This area if fully ventilated hence all building and code requirements can be met. With more sophisticated jobs such a this planning is paramount. Experienced installers can save you money and hassle! If you are looking at replacing your old gas hot water cylinder with an instant water heater, please view our instant water heater specials here.

An instantaneous water heater only heats water once an outlet is opened and the hot water comes out instantly. It will continuously heat water as it passes through the unit. When the outlet is closed, the energy source shuts off. As these units heat cold water as it flows through the heater, storage of hot water is not required, saving you hundreds of $$ every month!

In can be installed virtually anywhere but its main advantage is that it is ideally suited for for single point applications. It is fueled by either electricity or gas. instantaneous units are designed for mains pressure supply and can have a maximum operating pressure of up to 1000KPA.

Depending on the size of your home the instant water heater must be sized correctly to ensure your flow of hot water does not starve out. Most common sizes are 20L/Minute 27L/Minute and 32L/Minute. In the example above we have installed a Rheem 27 to a 2n bedroom villa in Remuera.

Click here to view the specifications RHEEM 27 Continuous Gas Heater

These units are available in LPG and Natural Gas and can be installed from $ 2800 including GST, all involved materials and gas certification. This offer does not include the electrical power point but can be arranged for $ 350  + GST. Contact us on 0800 4 Cylinders for more information.