American Water Heater 317994-002 Manual De Usuario

16

Hot Water
Outlet

In a closed system use a

thermal expansion tank

Cold Water

Inlet Valve

Pressure Reducing

Valve with Bypass

Main Water

Supply

Cold Water Supply

to Fixture

Discharge line

(Do Not Cap or Plug)

Drain line 3/4”

ID Min.

Drain

1“ Min.

Metal Drain

Pan 1-3/4”

Depth Max.

Massachusetts:

Install a vacuum relief

in cold water line per

section 19 MGL 142

6“ Min.

Temperature and Pressure (T&P)
Relief Valve (Optional Top T&P
Relief Valve Not Shown)

Unmixed
Hot Water

Mixed Water
To Fixtures

Cold Water

Inlet

Hot Water

Outlet

Mixing Valve

(Set To 120  F)

0

Please note the following: 
• 

The system should be installed only with piping that is 

suitable for potable (drinkable) water such as copper, 

CPVC, or polybutylene. This water heater must not be 

installed using iron piping or PVC water piping.

• 

Use only pumps, valves, or fittings that are compatible 

with potable water.

• 

It is recommend that only full flow ball or gate valves 

are used in water piping installations. The use of valves 

that may cause excessive restriction to water flow is not 

recommended.  

• 

Use only 95/5 tin-antimony or other equivalent solder. 

Any lead based solder must not be used.

• 

Piping that has been treated with chromates, boiler seal, 

or other chemicals must not be used.

• 

Chemicals that may contaminate the potable water 

supply must not be added to the piping system.

As water is heated, it expands (thermal expansion). In a closed 
system, the volume of water will grow. As the volume of water 
grows, there will be a corresponding increase in water pressure 
due to thermal expansion. Thermal expansion can cause 
premature tank failure (leakage). This type of failure is not 
covered under the limited warranty. Thermal expansion can also 
cause intermittent temperature-pressure relief valve operation: 
water discharged from the valve due to excessive pressure build 
up. The temperature-pressure relief valve is not intended for the 
constant relief of thermal expansion. This condition is not covered 
under the limited warranty.

A properly-sized thermal expansion tank should be installed 
on all closed systems to control the harmful effects of thermal 
expansion. Contact a plumbing service agency or your retail 
supplier regarding the installation of a thermal expansion tank.

• Temperature-pressure relief 

valve must comply with ANSI 
Z21.22-CSA 4.4 and ASME 
code.

•  Properly sized temperature-

pressure relief valve must be 
installed in opening provided.

•  Can result in overheating 

and excessive tank pressure.

•  Can cause serious injury or 

death.

Temperature and

Pressure Relief Valve
          (T&P)

Discharge line 3/4” Min.

Do not cap or plug.

6” Max.

Drain

Metal Drain Pan