Laserfiche WebLink
<br />C ,,[rul~i<Yl <br />\~~\ <br /> <br />Water System Piping <br /> <br /> <br />Piping Installation <br /> <br />Piping, fittings, and valves should be installed according <br />to the installation drawing (Figure 6). If the indoor <br />installation area is subject to freezing temperatures, the <br />water piping must be protected by insulation. <br /> <br />Water supply pressure should not exceed 80% of the <br />working pressure of the water heater. The working <br />pressure is stated on the water heater's data plate. If <br />this occurs a pressure limiting valve with a bypass may <br />need to be installed in the cold water supply line. This <br />should be placed on the supply to the entire house in <br />order to maintain equal hot and cold water pressures. <br /> <br />Important Heat cannot be applied to the water fittings <br />on the heater as they may contain nonmetallic parts. If <br />solder connections are used, solder the pipe to the <br />adapter before attaching the adapter to the hot and cold <br />water fittings. <br /> <br />Important Always use a good grade of joint compound <br />and be certain that all fittings are drawn up tight. <br /> <br />1. Install the water piping and fittings as shown in the <br />Figure 6. Connect the cold water supply (3/4 NPT) <br />to the fitting marked "C". Connect the hot water <br />supply (3/4 NPT) to the fitting marked "H". <br /> <br />Important Some models may contain energy saving <br />heat traps to prevent the circulation of hot water within <br />the pipes. Do not remove these inserts. <br /> <br />2. The installation of unions in both the hot and cold <br />water supply lines are recommended for ease of <br />removing the water heater for service or replacement. <br /> <br />3. The manufacturer of this water heater recommends <br />installing a tempering valve in the domestic hot water <br />line as shown in Figures 7 and 8. These valves reduce <br />the point-of-use temperature of the hot water by <br />mixing cold and hot water and are readily available. <br />Contact a licensed plumber or the local plumbing <br />authority. <br /> <br />4. If installing the water heater in a closed water system, <br />install a relief valve or expansion tank in the cold <br />water line as specified under "Closed SystemfThermal <br />Expansion". <br /> <br />5. Install a shut off valve in the cold water inlet line. It <br />should be located close to the water heater and be <br />easily accessible. Know the location ofthis valve and <br />how to shut off the water to the heater. <br /> <br />6. Install a temperature and pressure relief valve and <br />discharge line in the opening marked"T & P RELIEF <br />VALVE". Install as specified under "Temperature and <br />Pressure Relief Valve." <br /> <br />7. After piping has been properly connected to the water <br />heater, open the nearest hot water faucet and allow <br />the tank to completely fill with water. To purge the <br />lines of any excess air and sediment, keep the hot <br />water faucet open for 3 minutes after a constant flow <br />of water is obtained. Close the faucet and check all <br />connections for leaks. <br /> <br />6 <br /> <br />\ <br />\Qn'( <br />( <br /> <br />FIGURE 6 <br />WATER PIPING INSTALLATION <br /> <br />IN A CLOSED SYSTEM <br />USE EITHER: <br />THERMAL EXPANSION TANK <br />PRESSURE REUEF VALVE <br /> <br /> <br />UNION <br /> <br />t <br />COLD WATER <br />INLET VALVE <br /> <br />"TEMPERATURE AND <br />PRESSURE REUEF VALVE <br /> <br />DRAIN UNE <br />314 INCH ID <br />.. / MINIMUM <br />J? DRAIN N1ASSACUHSETTS: INSTALL A <br />~ VACUUM RELIEF IN COLDWATE <br />.... LINE PER SECTION 19 MGL 142. <br /> <br />FIGURE 7 <br />TEMPERING VALVE <br />SIDE WATER CONNECTIONS <br /> <br />FOLLOW THE TEMPERING <br />VALVE'S MANUFACTURER'S <br />INSTALLATION INSTRUCTIONS <br /> <br />HOT <br />WATER OUT <br />- <br /> <br /> <br />o <br /> <br />~~irRu~~ATER _ <br />TEMPERING VALVE ~ <br />SET TO 120" F MAXIMUM t <br /> <br /> <br />-+- <br />COLD WATER IN <br /> <br />~ <br /> <br /> <br />FIGURE 8 <br />TEMPERING VALVE <br />TOP WATER CONNECTIONS <br /> <br /> <br />FOLLOW THE TEMPERING <br />VALVE MANUFACTURER'S <br />INSTRUCTIONS <br /> <br />TEMPERED <br />WATER TO <br />FIXTURES <br /> <br />o~A\.~t . \~~ <br />'3~ 5gs O~41 <br />Q \ \gc:-r ~e.~~d~~c..J( <br />