A.O. Smith T-H2S-DV Troubleshooting Manual page 32

6) SECONDARY HEAT EXCHANGER
a. Disconnect the top of the condensate P‐loop hose.
Pinch the clamp to remove the hose.
b. Remove the two clips from either side of the
plastic secondary heat exchanger manifold pipes.
c. Remove the seven screws around the perimeter of
the heat exchanger, and then slide it out.
7) WATERWAYS
a. Disconnect the small drain clip on the left.
b. Remove the two clips below the water control
valve.
Figure 36
8) REMOVE THE HEAT EXCHANGER
a. Remove the seven screws from the perimeter of the secondary heat exchanger front
plate. Bend the tab on the left to slide the plate out.
b. FOR DV MODEL: remove the 5 screws from the back of the combustion chamber
connecting it to the exhaust fan air intake.
c. The heat exchanger should be free to remove. (NOTE: the water control valve must be
removed with the heat exchanger, the clips should already be disconnected)
Figure 38
Figure 35
Figure 37
Figure 39
32|
Page
Troubleshooting Guide