Freestyle 2 Series Manual page 114

FreeStyle
®
2
series
38 Maintenance
Inspect and clean the heat exchanger
Wait until heat exchanger/boiler is cooled down
before proceeding. Failure to do so can cause
severe injury.
1. See Figure 149 and Figure 153, page 115.
2. Use a 10mm wrench or socket to remove the five (5) nuts that
secure the burner cover plate to the heat exchanger.
3. Remove the heat exchanger cover plate, gasket, burner and
its gasket.
4. Inspect the refractory for any damage, replace if necessary.
Figure 149
Inspecting and cleaning heat exchanger
5. Remove ignitor.
6. Before using water to clean the heat exchanger, remove the
control module. Label wires if they are not labeled. Set aside.
Remove all connectors and wire harnesses from the control
module and then remove the screw securing it to the bracket.
7. Use a vacuum cleaner to remove any accumulation on the
heating surfaces. This includes removing any pieces of refrac-
tory that may have dropped into the exchanger.
Figure 150
Cleaning the heat exchanger
114
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wall mount gas fired water boiler
(continued)
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boiler manual
8. Lightly spray clean water on all of the boiler coils and
clean any residue off with (plastic only) brush. (Be
careful not to damage back refractory wall).
Figure 151
Cleaning the heat exchanger
9. Wipe any residue off coils with a clean rag.
10. Spray clean water, to finish flushing combustion
chamber.
Figure 152
Cleaning the heat exchanger
11. Dry with a clean rag.
12. Reinstall the spring.
13. Reinstall the burner, the burner gasket and ignitor.
14. Reinstall exchanger cover plate and gasket to heat
exchanger.
15. Tighten the heat exchanger cover plate's five (5) 10mm
nuts using a torque wrench. The nuts must be secure,
but the torque must not exceed 20 inch-pounds
Perform a complete start-up procedure when put-
ting the boiler back into service. See page 75 and all
instructions for start-up and verification. Include a
soap suds leak test on all interior and exterior gas
piping after starting the boiler.
Part number 550-142-950/0122