American Water Heater 317994-002 Manual De Usuario

27

3.  Insert the manifold/burner assembly into the burner 

compartment making sure that the tip of the manifold 
tube engages in the slot of the bracket inside the 
combustion chamber (Figure 29). 

4.  Inspect the door gasket and make sure there is no 

fiberglass insulation between the gasket and the 
combustion chamber.

5.  Replace the two screws, which secure the manifold/

burner assembly door to the combustion chamber 
and tighten securely. Once the manifold/burner 
assembly door is tightened, visually inspect the door 
gasket between the manifold/burner assembly door 
and the combustion chamber for spaces or gaps that 
would prevent a seal. IMPORTANT: Do not operate 
the water heater if the door gasket does not create a 
seal between the manifold door and the combustion 
chamber.

6.  During the following procedure, do not cross-thread 

or apply any thread sealant to any of the fittings listed 

below.  First, reconnect the manifold tubing to the gas 
control valve/thermostat.

7.  Reconnect the flame sense/hot surface igniter wire to 

the gas control valve/thermostat (Figure 24).

8.  Turn gas supply on and refer to the Lighting 

Instructions.

9.  With the burner lit, check the gas control valve/

thermostat supply line, two piece wire connector, and 

manifold tube connections for leaks. Check for leaks by 

brushing on an approved noncorrosive leak detection 

solution. IMPORTANT: Do Not splash solution onto 
the electrical connections. Bubbles forming indicate 

a leak. Correct any leak found. All leaks must be fixed 
immediately.

10.  Replace the outer door (see item K page 5).

IMPORTANT: Use only factory authorized replacement 

parts.
Removing the Gas Control Valve/Thermostat:
1.  Set the gas control valve/thermostat to its lowest setting 

by first depressing the COOLER      and HOTTER      

buttons together and hold for 1 second. Then press the 

COOLER      button until the lowest setting appears 

(Figure 21).

2.  Unplug the electrical transformer from the wall outlet.

3.  Turn off the gas supply to the water heater at the 

manual gas shut-off valve. This valve is typically located 

beside the water heater. Note the position of the shut-

off valve in the open/on position then proceed to turn it 

off (Figure 3).

4.  Drain the water heater. Refer to the section of 

“Draining and Flushing” section and follow the 

procedure.

5.  Disconnect the the flame sense/hot surface igniter 

wire, power supply transformer, pressure switch/

fan and display connector wires from the thermostat 

(Figure 24). Disconnect the manifould tube at the 

thermostat (Figure 24).

6.  Refer to “Gas Piping” section (Figure 3) and disconnect 

the ground joint union in the gas piping. Disconnect the 

remaining pipe from the gas control valve/thermostat.

7.  To remove the gas control valve/thermostat, thread a 

correctly sized pipe into the inlet and use it to turn the gas 

control valve/thermostat (counterclockwise.) Do not use 

pipe wrench or equivalent to grip body.  Damage may 

result, causing leaks. Do not insert any sharp objects into 

the inlet or outlet connections. Damage to the gas control 

valve/thermostat may result.

Replacing the Gas Valve:
1.   To replace the gas control valve/thermostat, 

reassemble in reverse order. When replacing the gas 

control valve/ thermostat, thread a correctly sized 

pipe into the inlet and use it to turn the gas valve 

(clockwise.) DO NOT OVER TIGHTEN or damage may 

result. NOTE: Use an approved 

TEFLON

®

 tape or pipe 

compound only on the threaded section of the gas 

control valve/thermostat that screws into the tank. 

2.   Reconnect the gas piping to the gas control valve/

thermostat. NOTE: Use an approved Teflon tape or 

pipe compound on the gas piping connections.

3.   Reconnect the manifold tube, flame sense/hot surface 

igniter wire, power supply transformer, pressure switch/

fan and display connector wires (Figure 24).

4.   Fill the tank completely with water. NOTE: To purge the 

lines of any excess air, keep the hot water faucet open 

for 3 minutes after a constant flow of water is obtained.

5.  Turn on the gas supply and test the gas supply 

connections by brushing on an approved noncorrosive 

leak detection solution. IMPORTANT: Do Not splash 

solution onto the electrical connections. Bubbles 

forming indicate a leak. Correct any leak found.

6.   Check the operation of the burner by following the 

lighting instructions on the front of the water heater. 

With the burner lit, check the gas control valve/

thermostat supply line, manifold tube connections for 

leaks. 

7.  Verify proper operation and then replace the outer door.
8.  If additional information is required, contact Residential 

Technical Assistance by referencing the phone number on 

the water heater or on the front cover of this manual.

TEFLON

®

 is a registered trademark of E.I. Du Pont De Nemours and Company