TO REMOVE MAIN BURNERS FOR INSPECTION AND CLEANING:

SERVICE MUST BE PERFORMED BY A QUALIFIED SERVICE AGENCY

A.) Turn thermostat to “OFF” or lowest setting.
B.) Turn off electric power to heater.
C.) Allow heater to cool.
D.) Turn off gas supply.
E.) Disconnect gas supply line at heater.
F.) Remove front panel.
G.) From outside, remove six (6) screws securing
back of outer cabinet to air intake and exhaust
flanges. (See Figure 5).
H.) From inside, gently slide combustion tube as
sembly forward and out of outer cabinet. (See
Figure 6).
I.) Disconnect valve wires and remove right side
of inner cabinet. (See Figure 15).
J.) Disconnect ignition cable and pressure switch
tubing from top of burner box. Remove screws
securing burner box topand lift top off of burner
box.
K.) Remove two screws that secure each burner to
burner mounting bracket. (See Figure 17).
L.) Once screws are removed, slide burner forward
slightly off of burner orifice and lift up.
FIGURE 17
FIGURE 15

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M.) You can now inspect, clean or replace
burner as needed. Clean by blowing com-
pressed air through burner. Special care
must be taken not to damage ceramic head
of burner, or enlarge the burner ports in
the ceramic head.
N.) Carefully check integrity of burner box top
gasket, then reinstall by reversing steps K -
A. Follow lighting instructions to put heater
in operation.
INSTRUCTIONS FOR WOW403 & WOW404
WOW403 / WOW404 MODELS HAVE FIVE BURNERS