9 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 74.

3.Disconnect wiring from the hot surface igniter and hose from the burner pressure tap.

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 and hot surface igniter.

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.The heat exchanger can be removed by sliding towards the front of the unit. 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 74.

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 9-3_Location of the Heat Exchanger Inside Jacket

Review with owner

1.Review the Copper-fin II User’s Information Manual with the owner.

2.Emphasize the need to perform the maintenance schedule specified in the Copper-fin II User’s Information Manual (and in this manual as well).

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 start-up at the beginning of the next heating season.

Oiled bearing circulators

Inspect the pump every six (6) months and oil as necessary. Use SAE 30 non-detergent oil or lubricant specified by the pump manufacturer.

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Lochinvar 402 - 2072 operation manual Inspect and clean the heat exchanger, Review with owner, Oiled bearing circulators

402 - 2072 specifications

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