American Water Heater High Efficiency Commercial Gas HCG Series AHCG3 119T 300 THRU AHCG3 119T 500 Series 200 201 User Manual

							71
4. See Closed Systems and Thermal Expansion on page 14.
5.  See Water Line Connections on page 41.
6.  If a pump is being installed between a water heater and storage tank or on a building 
recirculation loop wire according to Figure 59 on page 67.
7.  If  a  pump  is  being  installed  in  a  recirculation  loop  between  the  water  heater  and  a 
commercial dishwasher wire according to Figure 60 on page 67.
WATER PIPING DIAGRAMSBefore installation of water piping review the following:
1. See Mixing Valves on page 14.
2.  See Dishwashing Machines on page 14.
3.  See Temperature-Pressure Relief Valve on page 15.
ONE WATER HEATER, SINGLE TEMPERATURE
WITH HORIZONTAL STORAGE TANK FORCED RECIRCULATION
WITH BUILDING RECIRCULATIONNOTES:
1. Preferred piping method .
2.  The temperature and pressure relief valve setting shall not exceed press\
ure rating of any component in the system.
3.  Service valves are shown for servicing unit. Howeve r, local codes shall govern their usage.
4.  The tank temperature control should be wired to and control the pump bet\
ween the water heater(s) and the storage tank(s).
5.  The water heater ’s operating thermostat should be set 5 degrees F higher than the tank tem\
perature control.
LEGEND
TEMPERAT URE & 
PRESSURE RELIEF  VALVEPRESSURE RELIEF  VALVECIRCULA TING PUMP
TEMPERA TURE CONTRO L 
PROB EDRAINFULL PORT BALL  VA LVE
TEMPERAT URE GAGEWATER FLOW SWITC H
CHECK VA
LVE
WARNING : THIS DRA WING SHOWS SUGGESTED  
PIPING CONFIGURA TION AND OTHER DEVICES; 
CHECK WITH LOCAL  CODES AND ORDINANCES 
FOR  ADDITIONAL  REQUIREMENTS.ANY MA TERIAL, COMPONEN T OR VENDOR CHANGE  
MUST  HAVE PRIOR  APPROVAL BY THE  APPLICABLE 
PRODUCT  ENGINEERING DEPA RTMENT .
FINISHED 
FLOOR HOT WATE
R
RETURN
PIPE T&P TO
OPEN DRAIN
HOT
 WATE
R
TO FIXTURE S
CIRCULATING
PUMP
ALTERNATE
LOCATION
COLD WATER
SUPPLY
EXPANSION
TANK
STORAGE T ANK  
						

							72
4. See Closed Systems and Thermal Expansion on page 14.
5.  See Water Line Connections on page 41.
6.  If a pump is being installed between a water heater and storage tank or on a building 
recirculation loop wire according to Figure 59 on page 67.
7.  If  a  pump  is  being  installed  in  a  recirculation  loop  between  the  water  heater  and  a 
commercial dishwasher wire according to Figure 60 on page 67.
WATER PIPING DIAGRAMSBefore installation of water piping review the following:
1. See Mixing Valves on page 14.
2.  See Dishwashing Machines on page 14.
3.  See Temperature-Pressure Relief Valve on page 15.
TWO WATER HEATERS, SINGLE TEMPERATUREWITH BUILDING RECIRCULATIONNOTES:
1. Preferred piping method .
2.  The temperature and pressure relief valve setting shall not exceed press\
ure rating of any component in the system .
3.  Service valves are shown for servicing unit. Howeve r, local codes shall govern their usage.
LEGEND
TEMPERAT URE & 
PRESSURE RELIEF  VALVEPRESSURE RELIEF  VALVECIRCULA TING PUMP
TEMPERATURE CONTRO L 
PROB EDRAINFULL PORT BALL  VA LVE
TEMPERAT URE GAGEWATER FLOW SWITCH
CHECK VA
LVE
WARNING : THIS DR AWING SHOWS SUGGESTED  
PIPING CONFIGURA TION AND OTHER DEVICES; 
CHECK WITH LOCAL CODES  AND ORDINANCES 
FOR  ADDITIONAL REQUIREMENTS.ANY MA TERIAL, COMPONEN T OR VENDOR CHANGE 
MUST  HAVE PRIOR  APPROVAL BY  THE  APPLICABLE 
PRODUCT  ENGINEERING DEPA RTMENT.
FINISHED 
FLOOR HOT WATE
R
RETURN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
HOT WATE
R
TO FIXTURES
COLD WATER
SUPPLY
EXPANSION
TANK  
						

							73
4. See Closed Systems and Thermal Expansion on page 14.
5.  See Water Line Connections on page 41.
6.  If a pump is being installed between a water heater and storage tank or on a building 
recirculation loop wire according to Figure 59 on page 67.
7.  If  a  pump  is  being  installed  in  a  recirculation  loop  between  the  water  heater  and  a 
commercial dishwasher wire according to Figure 60 on page 67.
WATER PIPING DIAGRAMSBefore installation of water piping review the following:
1. See Mixing Valves on page 14.
2.  See Dishwashing Machines on page 14.
3.  See Temperature-Pressure Relief Valve on page 15.
THREE WATER HEATERS, SINGLE TEMPERATURE
WITH BUILDING RECIRCULATIONNOTES:
1. Preferred piping method .
2.  The temperature and pressure relief valve setting shall not exceed press\
ure rating of any component in the system .
3.  Service valves are shown for servicing unit. Howeve r, local codes shall govern their usage.
LEGEND
TEMPERAT URE & 
PRESSURE RELIEF  VALVEPRESSURE RELIEF  VALVECIRCULA TING PUMP
TEMPERA TURE CONTRO L 
PROB EDRAINFULL PORT BALL  VA LVE
TEMPERAT URE GAGEWATER FLOW SWITCH
CHECK VA
LVE
WARNING : THIS DRA WING SHOWS SUGGESTED  
PIPING CONFIGURA TION AND OTHER DEVICES; 
CHECK WITH LOCAL CODES  AND ORDINANCES 
FOR  ADDITIONAL REQUIREMENTS.ANY MA TERIAL, COMPONEN T OR VENDOR CHANGE 
MUST  HAVE PRIOR  APPROVAL BY  THE  APPLICABLE 
PRODUCT  ENGINEERING DEPA RTMENT.
FINISHED 
FLOOR HOT WATE
R
RETURN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
HOT WATE
R
TO FIXTURES
COLD WATER
SUPPLY
EXPANSION
TANK  
						

							74
4. See Closed Systems and Thermal Expansion on page 14.
5.  See Water Line Connections on page 41.
6.  If a pump is being installed between a water heater and storage tank or on a building 
recirculation loop wire according to Figure 59 on page 67.
7.  If  a  pump  is  being  installed  in  a  recirculation  loop  between  the  water  heater  and  a 
commercial dishwasher wire according to Figure 60 on page 67.
WATER PIPING DIAGRAMSBefore installation of water piping review the following:
1. See Mixing Valves on page 14.
2.  See Dishwashing Machines on page 14.
3.  See Temperature-Pressure Relief Valve on page 15.
FOUR WATER HEATERS, SINGLE TEMPERATURE
WITH BUILDING RECIRCULATIONNOTES:
1. Preferred piping method .
2.  The temperature and pressure relief valve setting shall not exceed press\
ure rating of any component in the system .
3.  Service valves are shown for servicing unit. Howeve r, local codes shall govern their usage.W ARNING : THIS DRA WING SHOWS SUGGESTED  
PIPING CONFIGURA TION AND OTHER DEVICES; 
CHECK WITH LOCAL CODES  AND ORDINANCES 
FOR  ADDITIONAL REQUIREMENTS.ANY MA TERIAL, COMPONEN T OR VENDOR CHANGE 
MUST  HAVE PRIOR  APPROVAL BY  THE  APPLICABLE 
PRODUCT  ENGINEERING DEPA RTMENT.
FINISHED 
FLOOR HOT WATE
R
RETURN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
HOT WATE
R
TO FIXTURES
COLD WATER
SUPPLY
TANK TEMPERAT URE
CONTROL
EXPANSION
TANK
LEGEND
TEMPERAT URE & 
PRESSURE RELIEF  VALVEPRESSURE RELIEF  VALVECIRCULA TING PUMP
TEMPERA TURE CONTRO L 
PROB EDRAINFULL PORT BALL  VA LVE
TEMPERAT URE GAGEWATER FLOW SWITCH
CHECK VA
LVE  
						

							75
 EFFECTIVE
For 3 Years, in the event of a tank leak, we will repair or, at our 
discretion, replace the defective water heater.
For 1 Year, in the event of part failure, we will repair or, at our 
discretion, replace the defective part.
We  warrant  this  product  against  defects  in  materials  or 
workmanship  as  described  in  this  document  if  installed  within 
the United States or Canada and provided the product remains 
at its original place of installation.
Warranty coverage begins the date of installation OR the date of 
manufacture if installation cannot be verified.
 WHAT'S COVERED
Subject  to  these  terms,  in  the  event  of  defect  in  materials  and/
or  workmanship  resulting  in  a  tank leak  during  the first  three 
years, we will:
•  Replace the water heater should the tank leak.
Subject to these terms, in the event of a defect in materials and/or 
workmanship appearing during the first year, we will:
•  Repair  or,  at  our  discretion,  replace  any  part  of  the  water 
heater  covered  under  this  limited  warranty  excluding  parts 
subject  to  normal  maintenance  (Example:  non-electronic 
anode rod, filter, etc)
Service/labor, shipping, delivery, installation, handling or any 
other costs are not covered at any time under this warranty.
Any  replacement  part  or  product  will  be  warranted  only  for 
the  unexpired  portion  of  the  original  water  heater’s  limited 
warranty period.
If an identical model is no longer available due to a change in law, 
regulation, or standard, we will replace the product with one having 
comparable  capacity  and  input.  In  these  instances,  the  owner  will 
have the option of paying the difference between what was paid for 
the original model and the new model with the additional features, 
or  receiving  a  refund  of  the  portion  of  the  purchase  price,  on  a 
pro-rata basis allocable to the unexpired portion of the warranty.
 WHAT'S NOT COVERED
•  Problems caused by improper: gas supply line sizing, gas type, 
venting, connections, combustion air, voltage, wiring, or fusing   
•   Failure to follow applicable codes   
•   Failure to follow printed instructions   
•   Abuse, misuse, accident, fire, flood, Acts of God   
•   Improper installation,  sizing, delivery, or maintenance   
•   Claims related to rust, noise, smell, or taste of water   
•   Failure to conduct authorized factory start up if required   
•   Alterations to the water heater   
•   Non-outdoor heaters installed outdoors   
•   Damages due to a failure to allow for thermal expansion   
•  Heat exchanger failure due to lack of adequate / proper supply 
of water   
•   Heaters moved from their original location   
•   Service trips to explain proper installation, use, or maintenance  of  the  product/unit  or  to  describe  compliance  requirements 
under applicable codes and regulations   
•    Charges  related  to  accessing  your  heater  including  but  not  limited to door/wall removal, equipment rental, etc.   
•   Replacement parts after expiration of this warranty   
 LIMITATIONS
NOTWITHSTANDING  ANYTHING  ELSE  TO  THE  CONTRARY, 
THIS  IS  YOUR  SOLE  AND  EXCLUSIVE  WARRANTY.  
ALL  OTHER  WARRANTIES  INCLUDING  A  WARRANTY 
OF  MERCHANTABILITY  OR  FITNESS  FOR  PARTICULAR 
 
PURPOSE  ARE  EXPRESSLY  DISCLAIMED.  SELLER  SHALL 
NOT  BE  LIABLE  FOR  ANY  CONSEQUENTIAL,  INCIDENTAL, 
SPECIAL, PUNITIVE OR OTHER INDIRECT DAMAGES.  TOTAL 
LIABILITY  ARISING  AT  ANY  TIME  SHALL  NOT  EXCEED  THE 
PURCHASE  PRICE  PAID  WHETHER  BASED  ON  CONTRACT, 
TORT, STRICT LIABILITY OR ANY OTHER LEGAL THEORY.
SERVICE INQUIRIES:
For service inquiries call the telephone number listed below.  Be prepared to provide the following information: 
name, address, and telephone number; the model and serial number of the water heater; proof of installation; and a clear description 
of the problem.  
For your records, fill in the product:
Serial: ___________________
Model: ___________________
  U.S. Customers:
  American Water Heaters
  500 Princeton Road
  Johnson City, TN 37605
 800-999-9515
 www.americanwaterheaters.com
COMMERCIAL
WATER HEATER 
LIMITED WARRANTY
LIMITED WARRANTY  
						

							P.O. Box 1597, Johnson City, TN 37605
Phone: 800-456-9805 • Fax: 800-999-5210 www.americanwaterheater.com
Copyright © 2015 American Water Heater Company. All rights reserved.www. americanwaterheate r.co m
American Wa ter Heater
Johnson Cit y, TN 37605