Reznor EEDU, Установка, эксплуатация и обслуживание

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49 I-EEDU (02-21) 150492-A
NOTE: Normally it not necessary to clean the main burners, but during the annual cleaning of the
heat exchanger tubes, it is wise to inspect the burners for plugged ports.
4. Clean main burners as necessary:
a . Using air pressure, blow out scale and dust accumulation from burner ports with air nozzle .
b . Blow air pressure through burner ports and venturi .
c . Use fine wire to dislodge any stubborn particles . Do not use anything that might change orifice port size (refer
to Table 21 .
Table 21. Burner Orifice Size
Unit Size
Natural Gas Propane
PN Quantity Drill Size PN Quantity Drill Size
075 38678 4 45 63003 4 1 .2 mm
100
11792
4
41 61652
4
1 .45 mm
125 5 5
140
45870
5
38 61653
5
1 .55 mm
170 6 6
200 7 7
225 8 8
250 45871 9 39 61653 9 1 .55 mm
300
45871
11
39 9789
11
53 350 13 13
400 15 15
5. Clean burner rack flash carryover systems using air pressure.
6. Reassemble burner rack and replace burner rack assembly by reversing steps 2 and 1, being careful not
to create any unsafe conditions.
Heat Exchanger Cleaning
1. Clean heat exchanger outer surfaces (circulating air side):
a . Gain access by removing inspection panels in ductwork or remove ductwork .
NOTE: If the heater has been converted to high CFM in accordance with High CFM Conversion
section, the baffles will have already been removed.
b . Remove baffles between heat exchanger tubes in accordance with Reverse Airflow Conversion section .
c . Remove accumulated dust and grease deposits from heat exchanger tubes and baffles using brush and/or
air hose .
d . Re-install baffles in accordance with Reverse Airflow Conversion section .
e . Secure ductwork as necessary .
2. Clean heat exchanger inner surfaces (combustion gas side):
NOTES:
• For cleaning the inner surfaces of the heat exchanger, an air hose, a long (18- to 24-inch) stiff
brush of 1/2-inch diameter or heavy wire with steel wool securely attached, a flashlight, and a
mirror are needed. The required procedure depends on the size of the furnace and the date of
manufacture.
• All unit size 75, 100, and 125 models do not have heat exchanger V-baffles.
• Unit sizes 140–400 manufactured before NOV 1995 do not have heat exchanger V-baffles. Unit
sizes 140–400 manufactured after OCT 1995 have heat exchanger V-baffles.
a . Remove burner rack assembly in accordance with
Burner Rack and Pilot Maintenance
section .
b . For all unit size 75, 100, and 125 models and for unit size 140–400 models manufactured before NOV 1995,
clean inner surfaces using furnace brush or piece of heavy wire to which piece of steel wool is attached .
Brush up and down within tubes until all soot is removed . Clean outside space between lower portions of heat
exchanger tubes to remove any accumulated dust or light deposits using air hose or brush .