American Water Heater 40 Gallon 42000 BTU UltraLow Nox Power Vent Natural Gas Water Heater PVUG6240T42NV User Manual

21
Operational Conditions
CondensationMoisture from the products of combustion condenses on 
the tank surface and the outside jacket of the water heater 
and forms drops of water which may fall onto the burner or 
other hot surfaces. This will produce a “sizzling” or “frying” 
noise. This condensation is normal and should not be 
confused with a leaking tank. Condensation may increase 
or decrease at different times of the year.
High effi cient energy saver water heaters will produce 
larger amounts of...

22
MAINTENANCE OF YOUR WATER HEATER
Draining and Flushing
It is recommended that the tank be drained and fl ushed 
every 6 months to remove sediment which may build up 
during operation. The water heater should be drained if 
being shut down during freezing temperatures. To drain the 
tank, perform the following steps:
1.  Turn off the gas to the water heater at the manual    gas shut-off valve.
2.  Turn off the electrical supply to the water heater.
3.   Open a nearby hot water faucet until the water is...

23
Replacement Parts
Replacement parts may be ordered through your 
plumber or the local distributor. Parts will be shipped at 
prevailing prices and billed accordingly. When ordering 
replacement parts, always have the following information 
ready:
1.  model, serial, and product number
2.  type of gas
3. item number
4. parts description
See “Repair Parts” section.
IMPORTANT: If you lack the necessary skills to perform 
the procedures in this section, you should not proceed.  
Get help from a qualifi ed...

24
Replacing the Burner Door Assembly
1.  Check the door gasket for damage or imbedded debris prior to installation.
2.  Inspect the viewport for damage and replace as required.
3.  Insert the burner assembly into the burner  compartment, making sure that the burner assembly 
sits firmly against the bracket inside the combustion 
chamber. See Figure 22. 
FIGURE 22
Close-up inside view of the combustion chamber
Bracket
4.  Inspect the door gasket and make sure there is no fiberglass insulation between the...

25
TROUBLESHOOTING
Please check the guidelines below.  For your safety, water heater service should be performed only by a qualifi ed person.  
# LED STATUS PROBLEM SOLUTION
1
Inadequate or no earth ground. 1  Ensure the wall outlet (power supply) is properly grounded.
2  Ensure all ground connections/wires on the water heater are 
securely connected.
2
High resistance to earth ground or 
reversed polarity in the 120 VAC 
power supply. 1  Ensure that the water heater is securely connected to earth...

26
TROUBLESHOOTING cont.
#LED STATUS PROBLEM SOLUTION
7
8
9
Self diagnostic check has detected 
a problem with the gas valve driver 
circuit, internal microprocessor, or 
other internal circuits. 1  Turn the power off for 10-20 seconds, then on again to clear 
these error codes.
2  If any of these error codes persist or cannot be cleared,  replace the gas control valve/thermostat.
10
Flame signal sensed out of proper 
sequence. 1  Turn the power off for 10-20 seconds, then on again to clear 
these error...

27
TROUBLESHOOTING cont.
PROBLEMCAUSE SOLUTION
NO HOT WATER
Blower will not run.
A) Blower unplugged. Plug blower back into 115 VAC. outlet.
B) No power at outlet. Repair service to outlet.
C) Thermostat defective. Replace thermostat.
D) High limit control circuit open. Replace ECO.
E) Blower motor defective. Replace Blower Assembly.
F) Pressure switch defective. Replace Pressure Switch/Blower Assembly.
NOT ENOUGH HOT WATER
Thermostat problems.
A) Thermostat set too low. Set temperature control higher....

28
REPAIR PARTS ILLUSTRATION
Item No. Parts Description
1 Blower
2 Pressure Switch (Not Pictured)
3 Flue Baffle
4 Heat Trap (Cold)
5 Heat Trap (Hot)
6 Cold Water Dip Tube
7 Anode Rod*
8 Temperature and Pressure Relief Valve
9 Drain Valve
10 Gas Control Valve/Thermostat 11 Flame Sensor/Hot Surface Igniter (HSI)**
12 FV Sensor**
13 FV Sensor Bracket**
14 Burner Door Assembly - Natural Gas / Ultra Low Nox**
15 Manifold Component Block w/Retainer Clip**
16 Viewport Assembly**
17 Burner Door Gasket**
18 Outer...

29
Listed Parts Kits and Illustrations
Item 11:  Flame Sense/Hot Surface Igniter Assembly. 
Item 12:  FV Sensor
Item 13:  FV Sensor Bracket
Item 14:  Burner door assembly (contains the manifold tube, gasket, manifold door\
, manifold component block with retainer clip, and flame sensor/hot surface igniter assembly).  Natural\
 Gas.
Item 15:  Manifold component block with retainer clip.
Item 16:  Viewport.
Item 17:  Burner door gasket.
Item 19:  Flexible manifold tube.
ITEM 11
ITEM 14
ITEM 16
ITEM 17ITEM...

30
NOTES