Desa RM50PVA owner manual Service Procedures, Continued, Ignitor

OWNER’S MANUAL

SERVICE

PROCEDURES

Continued

Fan

1.Remove three screws that attach fan guard to heater shell.

2.Remove motor and fan guard from heater shell (see Figure 14).

3.Use hex wrench to loosen set screw that holds fan to motor shaft (see Figure 15).

4.Remove fan. Be careful not to damage the fan blade pitch.

5a. If replacing fan, remove old fan and discard. Go to step 7 below.

5b. If cleaning fan,use soft cloth moistened with kerosene or solvent.

6.Dry fan thoroughly.

7.Place fan onto motor shaft. Make sure set screw contacts flat surface on mo- tor shaft. Tighten set screw firmly (40- 50 inch-pounds).

8.Place motor and fan guard into rear of heater shell. Make sure power cord is properly located (see Figure 16).

9.Insert three screws through heater shell and into fan guard. Tighten screws firmly.

Figure 14 - Removing Motor and Fan Guard from Heater

Setscrew

Figure 15 - Setscrew Location

Figure 16 - Replacing Motor and Fan Guard into Heater

IGNITOR

1.Remove motor and fan guard from heater (see Motor, page 8, steps 1 through 5).

2.Remove black ignitor wire from piezo ignitor. Access ignitor wire through un- derside of heater base (see Figure 17). Push wire up through bushing in heater shell.

3.Remove ignitor mounting screw from rear head using nut-driver or standard screwdriver (see Figure 18).

4.Remove ignitor from rear head.

5.Install new ignitor. Attach ignitor to rear head with ignitor mounting screw.

6.Run ignitor wire from new ignitor through bushing in heater shell. Attach ignitor wire to piezo ignitor.

7.Set gap between ignitor electrode and target plate to .17" (see Figure 19).

WARNING: Make sure heater is disconnected from propane supply. Heater could ignite caus- ing severe burns.

8.Test for spark. Push piezo ignitor but- ton and watch for spark between igni- tor electrode and target plate.

9.Place motor and fan guard into rear of heater shell (see Motor, page 8, steps 9 through 10).

	Piezo
	Ignitor
Ignitor Wire	Bushing

Underside of Heater Base

Figure 17 - Removing Ignitor Wire from Piezo Ignitor

Rear

Head

Ignitor

Ignitor

Mounting

Screw

Figure 18 - Removing Ignitor Mounting Screw and Ignitor

Target Plate	Ignitor
	Electrode

Gap

Area

Figure 19 - Clearance between Ignitor Electrode and Target Plate

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