Lochinvar 000 through 2, 1 warranty G. Secondary Heat Exchanger Inspection

NOTE: G. SECONDARY HEAT EXCHANGER INSPECTION

All gaskets/sealant on disassembled components or jacket panels must be replaced with new gaskets/ sealant on reassembly. Gasket and sealant kits are available from your distributor.

F.PRIMARY HEAT EXCHANGER INSPECTION

1.Turn off all power to the appliance.

2.Turn off main gas to appliance.

3.Remove the front outer jacket door.

4.Remove the front inner jacket door.

5. Check the heat exchanger surface	for	soot.	If	soot
is present, heat exchanger must	be	cleaned		and
problem corrected.

6.Remove burner as described in Burner Maintenance procedure.

7.Check “V” baffles on the exchanger. Remove and clean if necessary.

8. Remove soot	from heat exchanger with a	stiff
bristle brush.	Use a vacuum to remove loose	soot
from surfaces and inner chamber.

9.The heat exchanger can be removed by disconnecting all water piping to the bypass and secondary heat exchanger, removing the screws holding the heat exchanger to the top of the inner jacket. and sliding the heat exchanger towards the

front of		the	appliance.		Once		the	heat	exchanger
is	removed,		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 insulation blankets on the							inside	of	the	outer
jacket panels.

10.Ensure that any soot present on the burner is removed. See Burner Cleaning Procedure.

11.Carefully reinstall the heat exchanger and “V” baffles if removed from the appliance.

12. Reinstall	inner	jacket	panels,	burner,	manifolds,
wires and	hoses.	Use	new	gasket	material to
ensure a proper air seal.

13.Reassemble all gas and water piping. Test for gas leaks.

14.Reassemble outer jacket panels.

15.Cycle unit and check for proper operation.

FIG. 78 Location of Secondary Heat Exchanger

1.Turn off all power to the appliance.

2.Turn off main gas to appliance.

3.Break the union, pump flange and bypass valve

flange to remove the pump and external portion of the bypass assembly.

4.Remove the inner jacket door.

5.Check the heat exchanger surface for soot or

fouling.	If soot is present,	heat exchanger must
be cleaned and problem corrected.

6.Check “V” baffles on the exchanger. Remove and clean if necessary.

7.Remove soot from heat exchanger with a soft bristle brush. Use care not to damage coating on the exterior of the secondary heat exchanger. Use a vacuum to remove loose soot from surfaces and inner chamber.

8.The heat exchanger can be removed by disconnecting all water piping to the bypass and secondary heat exchanger and sliding the heat exchanger towards the rear of the appliance. Once

the heat exchanger is removed, a garden hose can be used to wash the tubes to ensure that all surface deposits are removed from the exterior of the heat exchanger surfaces.

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