Water Heater User Manual
36
25. Install the air intake chamber screen, ensuring that 
the prongs of the lower portion of the air intake 
chamber screen are in place in the holding slots. 
Using the 2 screws removed in step 8, secure the 
air intake chamber screen (Figure 65).
26. Check the air pressure tubing to the fitting on the 
of the air intake chamber box and route tubing 
in molded inlaid of the air intake chamber box 
(Figure 63). 
27. Reinstall the air intake chamber gasket (removed 
in step 12) on the back lower portion of the new air 
intake chamber box (Figure 66). 
28. Install the new air intake chamber box to the 
combustion chamber pipe. Using a small amount 
of soapy water will help. Do not get any water 
or soapy water on any electrical connections 
or gas control components (Figure 67). NOTE: 
UNDUE PRESSURE OR SUDDEN FORCE 
SUCH AS HAMMERING OR BEATING ON 
THE AIR CHAMBER BOX WITH ANY OBJECT 
INCLUDING YOUR HANDS WILL DAMAGE THE 
AIR INTAKE CHAMBER BOX AND RESULT IN 
FAILURE TO THE HEATER’S OPERATION.
29. Install the air intake chamber box by rotating 
the top of the air intake chamber box from left to 
right (only a few inches in both directions) while 
pressing on the bottom portion of the air intake 
chamber box. When properly installed the air 
intake chamber box will be in place against the 
water heater’s side aligning with the screw holes 
(Figure 67). 
30. Secure the air intake chamber box to the water 
heater’s side by reusing the 4 screws removed in 
step 11 (Figure 67).
31. Plug in the electrical flag terminals into the air 
pressure switch (Figure 60).
32. Reinstall the FV sensor removed in step 7, by 
depressing the snap lock to open the FV sensor 
cover, route wiring through sensor cover, plug the 
electrical flag terminals connections to the FV 
sensor and slide the FV sensor back inside and 
close the cover (Figure 60).
33. Connect the air pressure tubing to the pressure 
switch (Figure 60). 
34. Attach the 3-wire wiring harness connector to the 
gas control valve (Figure 59).
35. Check the air hose tubing connection to the 
pressure switch to ensure the tubing has not 
loosened up or pulled off (Figure 60).
36. Turn on the electrical and the gas supplies to the 
water heater. Plug in the electric connection from 
the transformer to the electric outlet (Figure 58).
37. Restart the water heater by following the 
directions on the “Lighting and Operating 
Instructions” label located on the front of the water 
heater.
38. Upon verifying proper operation of the water 
heater, replace the manifold cover/outer door.
Figure 66.
AIR INTAKE
CHAMBER BOX
REINSTALL
CHAMBER GASKET
Figure 65.
INSTALL THE AIR INTAKE 
CHAMBER SCREEN.
Figure 67.
ROTATE FROM 
LEFT TO RIGHT
 AND
PUSH INWARD
INSTALL SCREWS










