American International PR 150-34 2NV or 2PV Manual Do Utilizador

19

Read the data plate to be sure the water heater is made 
for the type of gas being used.  This information will be 
found on the data plate located on the front of the water 
heater. If the information does not agree with the type of 
gas available, do not install or operate the water heater. 
Call your dealer.

Note:  An odorant may be added by the gas supplier to 
the gas used by this water heater. This odorant may fade 
over an extended period of time. Do not depend upon this 
odorant as an indication of leaking gas.

The gas piping must be installed according to all local and 
state codes or in absence of local and state codes with 
the “National Fuel Gas Code”, ANSI Z223.1 (NFPA 54)-
latest edition. Canadian installations must be performed in 
accordance with CAN/CGA-B149.   Note:  If using a fl exible 
gas connector, make sure its rating tag matches or exceeds 
the input of the water heater.

Tables 2, 3A, and 3B on page 20 are provided as a sizing 
reference for commonly used gas pipe materials. Consult 
the “National Fuel Gas Code” for the recommended gas 
pipe size of other materials.  Follow the instructions below 
and reference fi gure 19 for gas piping installation.

1.  Install a readily accessible manual shut-off valve in the 

gas supply line as recommended by the  local utility. 
Know the location of this valve and how to turn off the 
gas to this unit. Note: DO NOT pipe across clean-out 
port (100 gal. only.)

2.  Install a drip leg as shown. The drip leg must be no  

less than 3 inches long for the accumulation of dirt,  
foreign material and water droplets.

3.  Install a ground joint union between the water heater  

and the manual shut-off valve.  This is to allow easy  
servicing.

4.  Turn the gas supply on and check for leaks. Use a 

chloride-free soap and water solution (bubbles forming 
indicate a leak) or other approved method.

Note:  Units with BTU/Hr inputs of 175,000 and above must 
have a minimum of 3/4” NPT gas pipe supplied to the water 
heater.

Important: The gas supply pressure must not exceed the 
maximum supply pressure as stated on the water heater’s 
data plate.  Minimum supply pressure should also be 
maintained per the data plate.