Desa BY70CEH, BY100CEH, BY150CEH Fuel and AIR Line Replacement and Proper Routing, Pump Rotor

12

SERVICE PROCEDURES

SERVICE PROCEDURES

Continued

FUEL AND AIR LINE REPLACEMENT AND PROPER ROUTING

1.	Remove upper shell (see page 8).
2.	Remove side cover screws using 5/16" nut driver.
3.	Remove side cover.
4.	Inspect fuel and air line hoses for cracks and/or holes. If fuel line
	hose is damaged, disconnect from nozzle adapter (see Figure 17,
	18, or 19, page 11) and from fuel filter (see page 8). If air line
	hose is damaged, disconnect from nozzle adapter (see Figure 17,
	18, or 19, page 11) and from barb fitting on pump end cover (see
	Figure 22).
5.	Install new air and/or fuel line. Attach one end of air line hose
	to barb fitting on pump end cover (see Figure 22) and the other
	end to nozzle adapter (see Figure 17, 18, or 19, page 11). At-

7.Check for debris in pump. If debris is found, blow out with compressed air.

8.Install insert and rotor.

9.Check gap on rotor. Adjust to .076/.101 mm (.003"/.004") if needed (see Figure 25, page 13).

Note: Rotate rotor one full turn to ensure the gap is .076/.101 mm (.003"/.004") at tightest position. Adjust if needed.

10.Install blades, pump plate, air filters, and filter end cover.

11.Replace fan guard and upper shell.

12.Adjust pump pressure (see page 10).

Note: If rotor is still binding, proceed as follows.

	tach one end of fuel line hose to fuel filter (see page 8) and the
	other end to nozzle adapter (see Figure 17, 18, or 19, page 11).
	For BY35CEH and BY70CEH model heaters, route air and
	fuel lines approximately as shown in Figure 17, page 11.
	Note: Hoses are not to be touching photocell bracket.
	For BY100CEH model heater, route air and fuel lines approxi-
	mately as shown in Figure 18, page 11.
	Note: Hoses are not to be touching photocell bracket.
	For BY150CEH model heater, route air and fuel lines approxi-
	mately as shown in Figure 19, page 11.
	Note: Hoses are not to be touching photocell bracket
6.	Replace side cover.
7.	Replace upper shell and fan guard (see page 8).

Insert

Blade

Pump Plate

Air Intake Filter

Filter End Cover

Rotor

Air Output

Filter

Fan Guard

Pump End

Cover

Barb Fitting

Air Hose

Figure 22 - Air Hose to Barb FItting

PUMP ROTOR

(Procedure if Rotor is Binding)

1.Remove upper shell (see page 8).

2.Remove filter end cover screws using 5/16" nut-driver.

3.Remove filter end cover and air filters.

4.Remove pump plate screws using 5/16" nut-driver.

5.Remove pump plate.

6.Remove rotor, insert, and blades.

Figure 23 - Rotor Location, BY35CEH and BY70CEH Models

Blade

Pump Plate

Air Intake Filter

Filter End Cover

Rotor

Insert

Air Output

Filter

Fan Guard

Figure 24 - Rotor Location, BY100CEH and BY150CEH Models

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