Piping, fittings, and valves should be installed according to the installation drawing (Figure 6). If the indoor installation area is subject to freezing temperatures, the water piping must be protected by insulation.
Water supply pressure should not exceed 80% of the working pressure of the water heater. The working pressure is stated on the water heater's data plate. If this occurs a pressure limiting valve with a bypass may need to be installed in the cold water supply line. This should be placed on the supply to the entire house in order to maintain equal hot and cold water pressures.
Important: Heat cannot be applied to be water fittings on the heater as they may contain nonmetallic parts. If solder connections are used, solder the pipe to the adapter before attaching the adapter to the hot and cold water fittings.
Important: Always use a good grade of joint compound and be certain that all fittings are drawn up tight.
按照图6所示安装水管线和连接件。将冷水供水管道（3/4 NPT英寸）连接到标注“C”的接头上。将热水管道（3/4 NPT英寸）连接到标注“H”的接头上。
Install the water piping and fittings as shown in Figure 6. Connect the cold water supply (3/4 NPT) to the fitting marked “C”. Connect the hot water supply (3/4 NPT) to the fitting marked “H”.
Important: Some models may contain energy saving heat traps to prevent the circulation of hot water within the pipes. Do not remove these inserts.
The installation of unions in both the hot and cold water supply lines is recommended for ease of removing the water heater for service or replacement.
The manufacturer of this water heater recommends installing a tempering valve in the domestic hot water line as shown in Figures 7 and 8. These valves reduce the point-of-use temperature of the hot water by mixing cold and hot water and are readily available. Contact a licensed plumber or the local plumbing authority.
If installing the water heater in a closed water system, install a relief valve or expansion tank in the cold water line as specified under "Closed System/Thermal Expansion".
Install a shut-off valve in the cold water inlet line. It should be located close to the water heater and be easily accessible. Know the location of this valve and how to shut off the water to the heater.
在标注“T&P RELIEF VALVE”的地方安装降温减压安全阀。按照“降温减压安全阀”的有关规定进行安装。
Install a temperature and pressure relief valve and discharge line in the opening marked "T & P RELIEF VALVE". Install as specified under "Temperature and Pressure Relief Valve.”
After piping has been properly connected to the water heater, open the nearest hot water faucet and allow the tank to completely fill with water. To purge the lines of any excess air and sediment, keep the hot water faucet open for 3 minutes after a constant flow of water is obtained. Close the faucet and check all connections for leaks.