Reznor EEDU Unit Installation Manual Uživatelský manuál stáhnout pdf (Strana 28)

Form I-EEDU, Page 28

FIGURE 27A - Vertical Spark

Pilot

FIGURE 27B -

Pilot

Location

Burner

Rear

Support

2-3/4” (70mm)

of burner

of pilot

and sensor

3/4” (±1/32”)

19mm (±.8mm)

When re-installing the pilot,

be sure to include the pilot

hole cover plate.

Size 75 100 125 140 170 200 225 250 300 350 400

Qty 4 4 5 5 6 7 8 9 11 13 15

Burner Orices for Sea Level Operation - Natural Gas

Drill Size (P/N) 45 (38678) 41 (11792) 38 (45870) 39 (45871)

Burner Orices for Sea Level Operation - Propane

Drill Size/ (P/N) 1.2mm (63003) 1.45mm (61652) 1.55mm (61653) 53 (9789)

Burner Orices

Burners - Normally it is unnecessary 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. Main burners may be cleaned using air pressure. Use an air

nozzle to blow out scale and dust accumulation from the burner ports. Alternately blow through the burner ports and the

venturi. Use a ne wire to dislodge any stubborn particles. Do not use anything that might change the port size.

Clean the burner rack ash carryover systems with air pressure.

10.2.3 Cleaning the

Heat Exchanger

Outer Surfaces (circulating air side) - To clean the outer surfaces of the heat

exchanger, gain access by removing the inspection panels in the ductwork or remove

the ductwork.

Remove the bafes between the heat exchanger tubes; see. FIGURE 2B, page 5.

(NOTE: If the heater has been converted to high CFM (see APPENDIX, page 30,

and Label on the unit), these bafes will have already been removed.) To remove the

bafes, remove the screws marked "A" in FIGURE 2B, and slide each bafe forward.

Use a brush and/or an air hose to remove accumulated dust and grease deposits from

the heat exchanger tubes and the bafes. Re-install the bafes by sliding them into the

slot in the other end of the heat exchanger and replacing the screws. Secure ductwork

as necessary.

Inner Surfaces (combustion gas side) - The inner surfaces of the heat exchanger

can be reached for cleaning with the burner rack removed (See Paragraph 10.2.2.)

An air hose; a long (18 to 24-inch), 1/2" diameter stiff brush; a ashlight; and a mir-

ror are needed. The required procedure depends on the size of the furnace and the

date of manufacture. Follow these instructions to clean the inner surfaces of the heat

exchanger.

All Sizes 75, 100 and 125 (do not have heat exchanger "V" bafes) and Sizes

140-400 manufactured prior to 11/95 (do not have heat exchanger "V" bafes)

-- Remove the burner rack assembly. Use a furnace brush (or a piece of heavy wire

to which a piece of steel wool is attached). Brush up and down within the tubes until

all soot is removed. With an air hose or brush, clean the outside space between the

lower portions of the heat exchanger tubes to remove any accumulated dust or light

deposits.

Sizes 140 - 400 manufactured beginning 11/95 (have heat exchanger "V" baf-

es) -- Remove the burner rack assembly. Make sure that the ue pipe is supported.

Remove the three screws that attach the venter housing to the outlet duct (pipe from

furnace to venter). The venter assembly will remain in place. Remove the six screws

used to attach the ue collection box to the top of the furnace. Remove the ue collec-

tion box exposing the heat exchanger tubes. The V-shaped tube bafes on the top of

the heat exchanger can now be removed.

10.2 Maintenance Procedures (cont'd)

10.0 Maintenance

and Service

(cont'd)

10.2.2 Burner Rack and Pilot (cont'd)

1 2 ... 23 24 25 26 27 28 29 30 31 32

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