York ARC 045, Installation Manual

Page: 44 / 52

Cleaning the flue passages and heat ex‐
changer
As long as combustion regulation is adequate, it is
rare that the heat exchanger needs to be cleaned. If
the heat exchanger becomes sooty, it may be cleaned
in the following manner:
1 Remove the burner group according to
Instruc‐
tions for burner and injector inspection , see on
page 38 .
2 Remove the screws from the upper part of the
casing and from the top turbine of the combustion
gas draft blower.
3 Remove the screws that hold the upper part of the
flue box without tearing the insulation beside it.
Afterwards, remove the central plate dividing the
upper and lower flue boxes.
4 Take out the flue baffles from inside the flue box -
C- from inside the heat exchanger pipes -B-. No‐
tice that the last curve in the baffle fits tightly in the
pipe -A-, requiring the end of the baffle to be well
secured to the tube collar -D-. To take it out, move
the end of the baffle towards the centre of the tube,
freeing it from the tube collar and then pulling out
in a straight line.
5 Using a metal brush with a flexible rod, brush the
interior of each of the tubes, brushing to the out‐
side and getting to the very end in the flue box as
well as at the beginning at the burners.
6 Also brush all of the inside of the flue box and the
baffles.
7 Run the brush over the the exhaust hoods, from
the side of the flue box downward.
8 If there is a large accumulation of soot, take the
draft blower out and clean the turbine and casing.
9 Once the brushing is finished, carefully clean the
residue using compressed air. If necessary us a
vacuum cleaner.
10 Put the parts back in the reverse order from which
they were removed.
11 When remounting the central and upper parts of
the flue box, be careful not to tear the insulation
beside it.
12 Make sure that all of the joints on the side with the
combustion system ventilation are air tight. Apply
high temperature (260 °C) sealing putty to do it.
1.19 Unit sound pressure data
Octave band sound spectrum dB(A), outdoor
Models 045 060 075 090
125 Hz
250 Hz
500 Hz
1,000 Hz
1 Installation manual
1.19 Unit sound pressure data
40