American Water Heater Commercial Gas NonDampered Water Heater CG32 User Manual

							 Commercial Gas Water Heater Use and Care Guide • 11
GETTING STARTED
GETTING STARTED
Ve n

						

							 12 • Commercial Gas Water Heater Use and Care Guide
GETTING STARTED
GETTING STARTED
•   The vent pipe must be fi rmly at-
tached and sealed to prevent it 
from falling out.
•   To aid in removing the vent pipe, a 
thimble or slip joint may be used.
•   The vent pipe must not extend 
beyond the inner edge of the 
chimney as it may restrict the 
space between it and the opposite 
wall of the chimney.
Do not terminate the vent pipe in a 
chimney that has not been cer

						

							GETTING STARTED
Commercial  Gas Water Heater Use and Care Guide • 13
GETTING STARTED
Space Hea

						

							 14 • Commercial Gas Water Heater Use and Care Guide
INSTALLATION
INSTALLATION
 Step 1:
✓Verify that your 
home is equipped 
and up-to-date for 
proper opera

						

							Commercial Gas Water Heater Use and Care Guide • 15
INSTALLATION
INSTALLATION
increases in water pressure (despite 
the use of a Pressure Reducing Valve 
in the home’s main water supply line). 
The Safe Drinking Water Act of 1974 
requires the use of backfl ow preven-
ters and check valves to restrict water 
from your home reentering the public 
water system. Backfl ow preventers are 
o
L  en installed in water meters and 
may not be readily visible. As a result, 
most all plumbing systems today are 
now “closed,” and almost all homes 
now need a Thermal Expansion Tank. 
A Thermal Expansion Tank is a prac

						

							 16 • Commercial Gas Water Heater Use and Care Guide
INSTALLATION
INSTALLATION
Step 2:
Verify that the loca

						

							Commercial Gas Water Heater Use and Care Guide • 17
INSTALLATION
INSTALLATION
2
On the old water heater, turn 
the control knob on the gas 
control valve to the    
    OFF posi

						

							 18 • Commercial Gas Water Heater Use and Care Guide
INSTALLATION
INSTALLATION
line is turned off . Disconnect the gas 
line from the water heater’s gas 
control valve and cap it.
13
Remove the old water heater. 
Use an appliance dolly or 
hand truck to move the water  
 heater.
WARNING! Use two or more 
people to remove or install a water 
heater. Failure to do so can result in 
back or other injury.
Step 4:
Installing the New
Water Heater
1
Completely read all instruc-


						

							Commercial Gas Water Heater Use and Care Guide • 19
INSTALLATION
INSTALLATION
 
Step 6:
Connect the Tempera-
ture and Pressure (T&P) 
Relief Valve/Pipe
Most T&P Relief Valves are pre-
installed at the factory. In some cases, 
they are shipped in the carton and 
must be installed in the opening 
marked “T&P Relief Valve” and accord-
ing to local codes.
Figure 25 - Temperature and Pressure Relief Valve
WARNING! To avoid serious injury 
or death from explosion, install a T&P 
Relief Valve according to the following 
instruc

						

							 20 • Commercial Gas Water Heater Use and Care Guide
INSTALLATION
INSTALLATION
3For water heaters that are fed 
by a solar water hea