63
10
Maintenance
(continued)
Inspect and clean the heat exchanger
Figure 10-3_Location of the Heat Exchanger Inside
Jacket
1. Turn off all power to the appliance.
2. Turn off main gas to appliance.
3. Remove the front outer jacket panel.
4. Remove the inner jacket panel (see FIG. 10-3).
5. Check the heat exchanger surface for soot. If soot is
present, the heat exchanger must be cleaned and the
problem
corrected.
6. Remove the burner as described in the
Inspect and
Clean
Burner
section of the VF Series Service Manual.
7. Check the “V” baffles on the heat exchanger. Remove
and clean if necessary.
8. Remove soot from the 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 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
Inspect and Clean Burner
section of the VF Series
Service
Manual.
11. Carefully reinstall the heat exchanger and “V” baffles if
removed from the appliance.
12. Reinstall the inner jacket panel, 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.
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 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.
NOTICE
14. Reassemble outer jacket panels.
15. Cycle unit and check for proper operation.
Review with owner
1. Review the VF Series User’s Information Manual with the
owner.
2. Emphasize the need to perform the maintenance schedule
specified in the VF Series 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.
Installation & Operation Manual
