8 Maintenance (continued)
Inspect and clean the heat exchanger
1.While burners are removed, check the heat exchanger surface for sooting. If present, heat exchanger must be cleaned and problem corrected. Proceed as follows.
2.Remove gas manifold(s)/orifice assemblies as described in steps 1 through 5 in Burner Removal and Cleaning, page 60.
3.Disconnect wiring from the hot surface igniter and remove igniter from the door panel to prevent damage to the igniter.
4.Remove inner jacket panel mounting screws and slide door assembly out toward front of the unit. Use caution to prevent damage to the refractory.
5.Check “V” baffles and frame runners along front and back edges of heat exchanger. Remove and clean if necessary.
6.Remove soot from heat exchanger with a stiff bristle brush. Use a vacuum to remove loose soot from surfaces and inner chamber.
7.If necessary, the heat exchanger can be removed. Once the heat exchanger is removed from the unit, a garden hose can be used to wash the tubes to ensure that all soot is removed from the heat exchanger surfaces. Note: Do not wet the unit’s refractory.
8.Ensure that all burner ports are cleaned to remove any soot. See Burner Removal and Cleaning, page 60.
9.Carefully reinstall the heat exchanger, “V” baffles, and frame runners if removed from the unit. Note: Make sure frame runners seal securely where they contact the front and rear compartment refractory.
10.Carefully reinstall inner jacket panels, burners, manifolds, wires and hoses. Use new gasket material to ensure a proper air seal.
11.Reassemble all gas and water piping. Test for gas leaks.
NOTICE Upon completion of any testing on the gas system, leak test all gas connections with a
soap and water solution while main burners are operating. Do not spray soap and water solution on the SMART SYSTEM control module housing. The use of an excessive amount of soap and water solution can damage the control. Immediately repair any leak found in the gas train or related components. Do not operate an appliance with a leak in the gas train, valves, or related piping.
12.Reassemble outer jacket panels.
13.Cycle unit and check for proper operation.
Installation & Operation Manual
HEAT
EXCHANGER
Figure
Review with owner
1.Review the
2.Emphasize the need to perform the maintenance schedule specified in this manual.
3.Remind the owner of the need to call a licensed contractor should the appliance or system exhibit any unusual behavior.
4.Remind the owner to follow the proper shutdown procedure and to schedule an annual
Oiled bearing circulators
Inspect the pump every six (6) months and oil as necessary. Use SAE 30
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