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Friday, April 11, 2008

Tips For Properly Installing Your Natural Gas Tankless Water Heater

Many consumers are choosing to upgrade their current tank water heater to the new and improved tankless water heater systems that are available. They offer the convenience so having hot water ready immediately when you want it instead of having to wait for it to heat up in a tank as with older models of water heaters. However, it is very important that you understand how to properly install your tankless water heater if you choose to do it yourself.

The most popular type of tankless water heater uses natural gas. There are some safety procedures you need to be aware of before you attempt to install one. The most important rule to follow is to make sure that the natural gas supply valve is completely turned off. You are going to need to disconnect the pipe that runs from the home to the supply of gas. After disconnecting this pipe the gas will flow into the home and it can result in death if you dont shut it off properly.

It isnt difficult to shut off the natural gas supply, but again it is vital that you do so. There is a switch on the side of the gas meter. Move the handle so that it is in the off position. You need to make sure there is absolutely no gas allowed into your home while you are installing the natural gas tankless water heater.

Next you will need to make sure the fittings from the existing pipe match the new pipe on the natural gas tankless water heater. You can measure them on each end to find out. If they are different then you are going to need to purchase the proper fittings so that everything can be aligned properly.

Make sure you thoroughly inspect it to ensure there is enough ventilation after you have installed the natural gas tankless water heater. This includes having a vent that leads to the outside of the home. You wont be able to vent the unit to an indoor area or you run the risk of death from the natural gas being in the home.

You can also find more information on demand water heaters and water heater systems. eTanklessHotWaterHeater.com is a comprehensive resource for tankless water heater with information on reviews, installation and how it works.

Books On Sivanada Yoga

Inexpensive PCs as CNC Machine Controllers

Part I, Utilizing an off the shelf PC as a CNC Controller

There are two main groups that can take advantage of todays low cost PCs as an effective and inexpensive CNC controller.

Retrofits to existing CNC machines with outdated or proprietary controls in need of service.

Shop built and home built CNC machines.

Inexpensive PCs can cost as little as $150.00 and yet provide a dependable and effective CNC machine controller. Some sources to consider for obtaining such a system are outpost.com and dell.com. Oupost.com is an outlet for Frys electronics. They have one PC on sale ranging from $150.00 to $199.00. Several have successfully used this PC in conjunction with MACH2 CNC controller software.

Tradeoffs: Price vs. Quality. With the lowest cost PCs there a tradeoff in performance, quality, and reliability. The manufacturers of these machines use low cost hardware in their manufacture and they make compromises in the design of the systems to keep their costs down. Inexpensive hardware translates directly to a higher failure rate and more difficult to obtain manufacturer support. This can be a deciding factor by itself if you rely on this machine for production.

Design compromises which are common in low cost PC have an impact on performance. The primary concerns are: insufficient memory, the use of shared memory, and on-board graphics devices. The primary hardware requirements for a PC based CNC controller are sufficient memory, and sufficient processor speed. You can see that the compromises present in these systems are in direct opposition to the requirements for CNC controller.

At the bottom end of the Inexpensive PC market there are off the self solutions that will function well as a PC based CNC controller. As with all things, you tend to get what you pay for, so the buyer is advised to be aware of the requirements and limitations that are in play.

Part II in this series of articles will examine an alternative to buying an off the shelf solution and explore building a PC to meet your specifications.

Yoga And Meditation Centre Calgary

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