A.O. Smith GPVL-50 Service Handbook page 15

DO NOT OPERATE THE WATER HEATER IF THE
DOOR GASKET DOES NOT CREATE A SEAL
BETWEEN MANIFOLD DOOR AND COMBUSTION
CHAMBER.
3. Reconnect the manifold tube to the gas control valve/
thermostat (Note: Do Not apply any thread sealant
at this connection). To prevent any cross threading
the manifold tube should be started by hand (turn
clockwise for natural gas, counter-clockwise for L.P.).
Upon tightening with the fi ngers and confi rming it has
not been cross threaded, tighten nut with an 3/4" open
end wrench (see Figure 15).
4. Reconnect all the electrical connections to the bottom
of the gas control valve/thermostat, gently pushing
each connector up until it snaps into place (see Figures
10 & 15).
5. Reconnect the electrical power to the water heater in
the wall outlet and turn the gas supply back "ON" to
the gas control valve/thermostat.
6. Restart the water heater by following the directions on
the "Lighting and Operating Instructions" label located
on the front of the water heater.
7. As the burner is heating (view flames through
viewport), test the manifold tube connection at the
gas control valve/thermostat by brushing on an
approved noncorrosive leak detection solution.
Important: Do Not splash any solution onto any
electrical connections.
8. Upon verifying proper operation of the water heater,
replace the outer door.
15