A.O. Smith GP 6 50YPC T 100 Benutzerhandbuch

50

Important: Use only factory authorized replacement 

parts.  If you lack the necessary skills to properly 

perform the installation, you should not proceed, but 

get help from a qualified service technician.
Tools required: 3/4” Open-End Wrench or Crescent 

Wrench, Phillips Head Screwdriver, a short length of 

1/2” threaded Pipe.

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

setting by pressing the “COOLER” and “HOTTER” 

buttons together at the same time holding for 1 

second. Then press the “COOLER” button to the 

lowest setting (Figure 112).

 2.  Turn gas control switch  to the “OFF” position 

(located right side of the gas control valve/

thermostat) and turn off the gas supply to the unit 

(Figure 113).

3.  Disconnect the electric connection by unplugging 

the transformer from the wall outlet (Figure 113).

4.  Release water pressure by opening a nearby hot 

water faucet, let run until water is cool to touch. 

Turn off water supply to the water heater.

5.  Remove the manifold cover/ outer door from the 

unit by depressing on the lower portion and pulling 

outward.

6.  Connect a drain hose to the drain valve and run 

it to an adequate drain or to the exterior of the 

building. Open the water heater drain valve and 

allow the water to drain from the tank.

7.  Unplug all the electrical connections from the 

bottom of the gas control valve/thermostat   

(Figure 114).

8.  Using a 3/4” open end wrench or a crescent 

wrench remove the manifold tube from the gas 

control valve/thermostat (turning counterclockwise 

-natural gas). Grasp the manifold tube and push 

down slightly to free the manifold tube from the 

gas control valve/thermostat (Figure 114).

9.  Using a phillips head screwdriver remove the 

transformer box from the front of the water heater 

by removing the one (1) screw at the top of the 

transformer box (save screw for reinstallation 

later) (Figure 115).

10. Disconnect the two (2) electrical flag connectors 

from the pressure switch, also disconnect the air 

pressure tubing. Using a phillips head screwdriver 

remove the pressure switch from the water 

heater’s front by removing the two (2) screws 

securing it (save screws for reinstallation later) 

(Figure 115).

g

COOLER

HOTTER

Electronic Control Display

ON/OFF 

SWITCH

ON

OFF