Gas Tankless Water Heater Installation
Home owners are required to meet following conditions before attempting to tankless water heater installation.
If in the US, the installation of tankless water heater should conform with the local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. Where as in Canada, comply with CGA B149.(1,2) INSTALLATION CODES and /or local installation codes.
You may plan where you will install the water heater. It is very important to ascertain the correctness of combustion air supply and vent pipe installation. Incorrect installation will cause fatal accidents, such as carbon monoxide poisoning or fire.
When the unit is installed indoors and ROOM SEALED (twin pipe) it is permitted to be located in bathrooms, bedrooms and occupied rooms that are normally kept closed. If the unit are installed indoors and use indoor combustion air, the place must have enough ventilation.
The National Fuel Gas Code does not allow UNSEALED gas fired water heater installations in bathrooms, bedrooms or any occupied rooms normally kept closed.
It is essential that you must vent your heater. You should also ensure that the water heater and its gas connection are thoroughly checked for leak.
Also, note that your water heater is installed away from the gas supply piping system by closing its individual manual gas shutoff valve during any pressure testing at pressures in excess of ½ Psig (3.5
kPa).
The tankless water heater area is kept free of combustibles and flammable liquids. Ensure that you do not locate the heater over any material which might burn.
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In order to maintain proper operation of your tankless water heater, the correct gas pressure is critical. See that the gas piping is sized to provide the required pressure at the maximum output of the heater.
There can be instances of overheating. On such situations, turn off the gas supply at the manual gas shut off valve, on the gas line.
Another important point is do not use your water heater if any of its parts is underwater. Get it inspected by a qualified service technician so that you can replace the part of the control system or any gas control which is underwater.
These are some of the important points you have to keep in mind before attempting tankless water heater installation. This will help protect you and your family from possible mishap.
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