American Water Heater Ultra Low NOx MODELS Installation Instructions And Use & Care Manual Download Page 21

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Operating the Temperature Control System

Figure 19: Status Codes

VAC

List of status codes are shown
at top of gas control valve/thermostat.

Water Temperature Adjustment

The water temperature can be adjusted from 55°F to 155°F.
Turn the Gas Control/Temperature Knob to the desired
setting/temperature.

Operating Modes and Settings

•

Standard Mode

- The controller adjusts the water

heater to maintain the temperature set by the user.

• Vacation

Setting

- The controller adjusts the water

temperature to approximately 55°F. This setting is
recommended when the water heater is not in use for
a long period of time. This effectively turns the water
heater down to a setting that prevents the water from
freezing.

Status Light Code

Normal Flashes:

•

0 Flashes Indicates Control Off/Pilot Out.

•

1 Flashes Indicates Normal Operation.

•

Continuous Light indicates the gas control
valve/thermostat is shutting down.

Diagnostic Flashes:

If the water heater is not working look

for the following diagnostic flashes after lighting the pilot.
2 Flashes Indicates Thermopile Voltage Low
4

Flashes

Indicates

Overheat

Failure

5 Flashes   Indicates Sensor Failure
7 Flashes   Indicates Electronic Control Failure
8 Flashes   See “Status Light Code Troubleshooting Chart.”

Summary of Contents for Ultra Low NOx MODELS

Page 1: ...ire or explosion may result causing property damage personal injury or death INSTALLER AFFIX THESE INSTRUCTIONS TO OR ADJACENT TO THE WATER HEATER OWNER RETAIN THESE INSTRUCTIONS AND WARRANTY FOR FUTURE REFERENCE RETAIN THE ORIGINAL RECEIPT AS PROOF OF PURCHASE Table of Contents 2 325002 000 January 2013 Direct Vent Residential Gas Water Heater To obtain technical warranty or service assistance du...

Page 2: ...not followed Important Instructions Do not use this appliance if any part has been under water Immediately call a qualified person Water heaters sub jected to flood conditions or any time the gas controls main burner or pilot have been submerged in water require replacement of the entire water heater Hydrogen gas can be produced in a hot water system that has not been used for a long period of tim...

Page 3: ...ntally vented gas fueled heat ing appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector observes carbon monoxide detectors and si...

Page 4: ...ructions thoroughly before attempting the installation or operation of this water heater Do not discard this manual You or future users of this water heater will need it for future reference IMPORTANT The manufacturer and seller of this water heater will not be liable for any damages injuries or deaths caused by failure to comply with the installation and operating instructions outlined in this ma...

Page 5: ...iquids in the vicinity of this or any other appliance Storage of or use of gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance can result in serious injury or death Flammable Vapors FLAMMABLES Read and follow water heater warnings and instructions WARNING Carbon Monoxide Poisoning Hazard Do not install in a mobile home Doing so can result in death or carbon...

Page 6: ...ions The water heater should be located in an area not subject to freezing temperatures Water heaters located in unconditioned spaces i e attics basements etc may require insulation of the water piping and drain piping to protect against freezing The drain and controls must be easily accessible for operation and service Maintain proper clearances as specified on the data plate Clearances and Acces...

Page 7: ...bbles will show a leak Correct any leak found Gas Pressure IMPORTANT The gas supply pressure must not exceed the maximum supply pressure as stated on the water heater s data plate The minimum supply pressure is for the purpose of input adjustment Gas Pressure Testing IMPORTANT This water heater and its gas connection must be leak tested before placing the appliance in operation If the code require...

Page 8: ...cating the water heater next to an outside wall All necessary components are supplied for the standard through the wall installation Optional vertical and horizontal extension kits are available for installations that exceed the standard horizontal and vertical distances see table at right Only one vertical and one horizontal kit can be used on the same installation Through the Wall Flex Pipe Vent...

Page 9: ...eight for all water heaters is 90 Minimum height for 40 Gallon water heaters 68 and minimum height for 50 Gallon water heaters is 76 Figure 4A Dim B is measured from the center of water heater to the outside of the exterior wall Minimum horizontal is 22 for all water heaters at the maximum height of 90 Figure 4A 5 Cut a 6 opening through the wall in the location as shown Note location is determine...

Page 10: ...ce the 3 tube located in the vent cap into the end of the 3 telescoping tube See Figure 7 Drill two holes 180 apart with a 1 8 drill bit and secure with two 8 sheet metal screws Apply sealant to the joint Seat the cap against outer wall plate with the word HOT in an upright position 8 Secure the vent cap outer wall plate assembly to the exterior wall with the four 1 and 1 2 screws provided See Fig...

Page 11: ... with the 1 8 drill and fasten with four 8 sheet metal screws provided Apply silicone sealant to the seam Install the 5 inch elbow over the 3 inch elbow and seat it down onto the crimped end of the 5 inch extension pipe Temporarily place the 5 inch telescoping pipe onto the 5 inch elbow and adjust it to give a 1 4 inch per foot downward slope to the outside wall Secure the 5 inch elbow to the exte...

Page 12: ...offit F Clearance to outside corner U S Installation Clearance in accordance with local installation codes and the requirements of the gas supplier G 12 in 30 cm min clearance to inside corner formed by two exterior walls H 4 ft 122 cm min clearance to each side of center line extending above meter regulator assembly I 4 ft 122 cm min clearance to service regulator vent outlet J 12 in 30 cm min cl...

Page 13: ...ture of the water by mixing cold and hot water and are readily available for use 4 If installing the water heater in a closed water system install an expansion tank in the cold water line as specified under Closed System Thermal Expansion section 5 Install a shut off valve in the cold water inlet line It should be located close to the water heater and be easily accessible Know the location of this...

Page 14: ...erson include licensed plumbers authorized gas company personnel and authorized service personnel Do not plug valve Do not remove valve Failure to follow these instructions can result in death or explosion WARNING 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...

Page 15: ...installed to allow complete drainage of both the valve and discharge line T P Relief Valve and Pipe Insulation Some Models 1 Locate the temperature and pressure relief valve on the water heater also known as a T P relief valve See Figure 14B 2 Locate the slit running the length of the T P relief valve insulation 3 Spread the slit open and fit the insulation over the T P relief valve See Figure 14B...

Page 16: ... tem Otherwise these bubbles will be trapped in the air handler heat exchanger coil reducing the efficiency Do not connect the water heater to any system or components previously used with non potable water heating appliances when used to supply potable water Some jurisdictions may require a backflow preventer in the incoming cold water line This may cause the temperature and pressure relief valve...

Page 17: ...f venting has a 15 foot maximum height for the 50 Gallon direct vent water heater and a maximum of 14 3 1 4 for the 40 Gallon direct vent water heater Vent pipe system installed according to all local and state codes or in the absence of local and state codes the National Fuel Gas Code ANSI Z223 1 NFPA 54 current edition Water System Piping Temperature and pressure relief valve properly installed ...

Page 18: ... the air intake grid bottom of combustion chamber and require replacement of the entire water heater WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life TO TURN OFF GAS TO APPLIANCE 1 Turn the gas control temperature knob counterclockwise to the OFF setting The status light will stop blinking and stay on for...

Page 19: ...et This water heater s temperature control has been designed to accurately regulate the water temperature However under certain operating conditions the water temperature may temporarily exceed the dial setting Consequently in addition to setting the temperature no higher than 120 F we recommend the installation of a mixing valve or an anti scald device in the hot water supply line or at the point...

Page 20: ...ain threshold 35 minutes 1 minute 5 seconds 2 seconds 1 second instantaneous 45 minutes 5 minutes 25 seconds 5 seconds 2 seconds 1 seconds U S Government Memorandum C P S C Peter L Armstrong Sept 15 1978 VAC Figure 18 Gas Control Valve Thermostat Settings Gas Control Temperature Knob Status Light Igniter 120 F Mark NOTE During low demand periods when hot water is not being used a lower thermostat ...

Page 21: ... This setting is recommended when the water heater is not in use for a long period of time This effectively turns the water heater down to a setting that prevents the water from freezing Status Light Code Normal Flashes 0 Flashes Indicates Control Off Pilot Out 1 Flashes Indicates Normal Operation Continuous Light indicates the gas control valve thermostat is shutting down Diagnostic Flashes If th...

Page 22: ...lure 4 Flashes See Operating the Temperature Control System If the ECO has functioned the gas control valve thermostat should be replaced by a qualified person Contact your local dealer for service information Anode Rod Water Odor Each water heater contains at least one anode rod which will slowly deplete due to electrolysis prolonging the life of the water heater by protecting the glass lined tan...

Page 23: ...nd pilot burner Check for a soft blue flame Leaking or damaged water and gas piping Presence of flammable or corrosive materials in the installation area Presence of combustible materials near the water heater After servicing this water heater check to make sure it is working properly See Operating Your Water Heater section of this manual IMPORTANT If you lack the necessary skills required to prop...

Page 24: ...te thermopile wires from the gas control valve thermostat See Figures 22 23 6 Grasp the manifold tube and push down slightly carefully remove the burner door assembly from the burner compartment NOTE Be sure not to damage internal parts Natural Gas Burner Ultra Low Nox Check the burner to see if it is dirty or clogged The burner may be cleaned with soft paint brush Figure 24 Do not use a wire brus...

Page 25: ... pilot nut IMPORTANT Keep the pilot orifice in the pilot when making the connection DO NOT operate the water heater without the pilot orifice installed 8 Push the new pilot assembly connectors through the opening in the burner door See Figure 25 9 Attach the pilot assembly to the Burner Door Assembly 10 Position the new thermopile wires through the top opening of the manifold component block Figur...

Page 26: ...y WARNING Replace manifold component block if missing or removed Replace door gasket if damaged Failure to follow these instructions can Replace viewport if glass is missing or damaged Tighten all burner door screws securely Explosion Hazard Remove any fiberglass between gasket and combustion chamber Figure 28A Combustion Chamber Door Gasket Combustion Chamber Figure 28B Close up inside view of th...

Page 27: ...er Follow the Lighting Instructions on page 18 If additional information is required reference the number on the cover of this manual for service information Operational Checklist TROUBLESHOOTING CHART 4 No leaks at pilot and manifold connection 5 Manifold door screws securely tightened 1 Manifold gasket properly sealed 2 Viewport not damaged or cracked 3 Manifold component block properly installe...

Page 28: ...perature dial to desired setting 6 Install adequate heater 7 Correct piping dip tube must be in cold inlet 8 Advise customer DRIP FROM RELIEF VALVE 1 Excessive water pressure 2 Heater stacking 3 Closed water system 1 Use a pressure reducing valve and relief valve 2 Lower the thermostat setting 3 See Closed System Thermal Expansion THERMOSTAT FAILS TO SHUT OFF 1 Thermostat not functioning properly ...

Page 29: ...ure contact a qualified person 8 FLASHES This condition only appears if the gas control temperature knob has been turned off and the thermopile continued to produce electric power This condition can occur if the thermopile does not cool down as quickly as expected when the unit is shut off This condition can also occur if the gas control temperature knob has been turned off and the pilot continues...

Page 30: ...GE 16 DRAIN VALVE 17 ANODE ROD 18 VIEWPORT 19 DOOR SCREW 20 BURNER DOOR ASSEMBLY NAT GAS 21 MANIFOLD COMPONENT BLOCK 22 OUTER DOOR 23 OPTIONAL VENT GUARD SEE PAGE 12 KIT 6907245 Pictured on next page When ordering repair parts always give the following information 1 Model serial and product number 2 Type of gas 3 Item number 4 Parts description Repair Parts List LEGEND Special anode rod see page 2...

Page 31: ...he burner gasket door pilot tube manifold component block with retainer clip temperature sensor and pilot assembly Natural Gas Low Nox Item 20a Pilot assembly kit which contains the pilot electrode and thermopile Natural Gas Item 20b Flexible manifold tube Item 21 Manifold component block and retainer clip Item 20a 21 14 18 20b 20 ...

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