American Water Heater 317994-002 Manual De Usuario

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15
Piping Installation                                                  
Piping, fittings, and valves should be installed according 
to the installation drawing (Figure 13). If the indoor 
installation area is subject to freezing temperatures, the 
water piping must be protected by insulation.
The water supply pressure should not exceed 80 psi. If 
this occurs, a pressure reducing valve with a bypass may 
need to be installed in the cold water inlet 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 the 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.
1.  Install the water piping and fittings as shown in Figure 
13. Connect the cold water supply (3/4” NPT) to the 
cold water inlet fitting. Connect the hot water piping 
(3/4” NPT) to the hot water outlet fitting.
IMPORTANT:  Some models may contain energy saving 
heat traps to prevent the circulation of hot water within the 
pipes. Do not remove the inserts within the heat traps.
2.  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.
3.  The manufacturer of this water heater recommends 
installing a mixing valve or an anti-scald device in the 
domestic hot water line as shown in Figure 14. These 
valves reduce the point-of-use temperature of the 
water by mixing cold and hot water and are readily 
available for use. 
4.  If installing the water heater in a closed water system, 
install an expansion tank in the cold water line as 
specified under Closed System/Thermal Expansion.
5.  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.
6.  A temperature and pressure relief valve must be 
installed in the opening marked “Temperature and  
Pressure (T & P) Relief Valve” on the water heater. 
A discharge line must be added to the opening of 
the T&P Relief Valve. Follow the instructions under 
Temperature and Pressure Relief Valve. 
7.  After piping has been properly connected to the water 
heater, remove the aerator at the nearest hot water 
faucet. Open the hot water faucet and allow the tank 
to completely fill with water. To purge the lines of 
any excess air, 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.
WATER SYSTEM PIPING
Maintain
Clearance*
Support Strap
3 FT.
Minimum
Vent
Connector
Slope Up
1/4 Inch
Per Foot
Minimum
**Maintain
Specified
Clearance
Venting Gas Vent System With Type B Double Wall Vent Pipe.
2 FT. Minimum Above
Any Object Within
10 FT. Horizontally
Type B Double
Wall Vent Pipe
FIGURE 11.
Seal
 
Maintain
Clearance*
Support Strap
Specified Minimum Clearance
Vent
Connector
Slope Up
1/4 Inch
Per Foot
Minimum
Vent Connector
**Maintain
Specified
Clearance
Venting Through Chimney With Type B Double Wall Vent Pipe.
Unused Chimney
Flue Or Masonry
Enclosure
Maintain Manufacturer’s
Listed Vent Cap
FIGURE 12.
*
 Maintain vent pipe clearance requirements to local, state 
and/or the “National Fuel Gas Code”, ANSI Z223.1(NFPA 
54)-current edition.
**
 NFPA 211, Standard for Chimneys, Fireplaces, Vents, and 
Solid Fuel-Burning Appliances states that these chimneys are 
intended to be installed in accordance with the installation 
instructions provided with each chimney support assembly. 
Minimum air space clearance to combustible materials should be 
maintained as marked on the chimney sections.