York B4IH-360, Technical Information

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19.4.- Cleaning heat exchanger
With adequate combustion regulation, the heat exchanger
pipes rarely require cleaning. If there is an accumulation of
soot, these can be cleaned as follows:
1. Disassemble the gas valve/burner assemblies as per
section 19..
2. Disassemble the smoke stack front panel (screws T).
This panel includes the 2 impulse/extraction fans. Take
special care in not damaging the air tightness gasket
(Fig. 26).
. The smoke stack interior and the end of the exchanger
pipes are now accessible.
4. Using a metal brush with flexible rods, brush and sweep
each one of the pipes in an outward direction, both at the
end of the smoke stack as well as at the beginning of the
burner section.
5. Also brush out the interior of the smoke stack.
6. Once brushing is finished, clean with compressed air or
nitrogen. Use a vacuum cleaner, if necessary.
7. Invert this process to reinstall the assembly. Make sure
the front panel of the smoke stack is airtight.
- Fig. 25 -
- Fig. 26 -
T3