American Water Heater Commercial Gas NonDampered Water Heater CG32 User Manual

 100266461 
August 2015
Commercial Gas 
Water Heater
Installa

 
COMPLETED INSTALLATION 

Commercial Gas Water Heater Use and Care Guide • 3
SAFETY
IMPORTANT SAFETY INFORMATION
Important informa

 4 • Commercial Gas Water Heater Use and Care Guide
SAFETY
IMPORTANT SAFETY INFORMATION
T
o reduce the risk of property 
damage, serious injury or death, 
read and follow the precau

Commercial Gas Water Heater Use and Care Guide • 5
SAFETY
IMPORTANT SAFETY INFORMATION
•   If the water supplied to the water 
heater is pre-heated (for example, 
by a solar system) the temperature 
in the tank may be higher than the 
water heater’s temperature se

 6 • Commercial Gas Water Heater Use and Care Guide
SAFETY
IMPORTANT SAFETY INFORMATION
if the T&P Relief Valve or discharge 
pipe is blocked. Do not cap or plug the 
T&P Relief Valve or discharge pipe.
Fire and Explosion Risk if Hot Water is 
Not Used for Two Weeks or More.
CAUTION! Hydrogen gas builds up 
in a hot water system when it is not 
used for a long period (two weeks or 
more). Hydrogen gas is extremely 
fl  ammable. If the hot water system 
has not been used for two weeks or 
more, open a hot...

 Commercial Gas Water Heater Use and Care Guide • 7
GETTING STARTED
GETTING STARTED
1
Review all of the instruc

 8 • Commercial Gas Water Heater Use and Care Guide
GETTING STARTED
GETTING STARTED
Example:
Gas Burning Appliance BTU/HR (kW) Ra

GETTING STARTED
Commercial Gas Water Heater Use and Care Guide • 9
GETTING STARTED
A2:  Calculate required air volume
A water heater installed in an unconfi ned 
a

 10 • Commercial Gas Water Heater Use and Care Guide
GETTING STARTED
GETTING STARTED
For example, an installa