Desa RLP375A, BLP375A owner manual Service Procedure, Cleaning Fan

OWNER’S MANUAL

SERVICE

PROCEDURE

WARNING: Never service heater while it is plugged in, con- nected to propane supply, oper- ating, or hot. Severe burns and electrical shock can occur.

CLEANING FAN

Clean fan every 500 hours of operation or as needed.

1.Remove screws on side cover using 5/16" nut-driver.

2.Remove side cover.

3.Detach the five motor wires from parts under heater shell. Be sure to detach only wires coming from motor.

The five motor wires are:

•white wire—to terminal board

•black wire—to terminal board

•blue wire—to thermal switch wire

•orange wire—to solenoid valve

•green wire—to grounding screw on shell

4.Remove fan guard from rear of heater.

Thermal	Grounding Screw
Switch Wire

Terminal

Board

5.Reach into rear of heater shell. Care- fully pull motor wires through hole in bottom of shell. Note: Pull wires through hole one at a time.

6.Remove nuts and mounting bolts hold- ing motor mount to shell. Use 3/8" nut- driver and 7/16" wrench.

7.Carefully pull motor and fan out of shell. IMPORTANT: Be careful not to damage fan. Do not set motor and fan down with the weight resting on fan. This could damage fan pitch.

8.Turn motor and fan around. Place motor and fan into shell backwards. Note: Mo- tor will go into shell first (see Figure 8).

9.Line up rear mounting holes in shell with first hole on each side of motor mount (see Figure 8). Note: When holes are lined up, fan should be out- side of shell.

10.Holding mounting bolt, carefully reach through fan blades into rear of heater. Be careful not to damage fan pitch. In- sert bolt through motor mount and shell. With free hand, attach nut finger tight. Repeat process for other mounting hole.

11.Use 1/8" hex wrench to loosen setscrew which holds fan to motor shaft (see Fig- ure 9).

Rear

Mounting

Hole

First

Hole

12.Slip fan off motor shaft.

13.Clean fan using soft cloth moistened with kerosene or solvent.

14.Dry fan thoroughly.

15.Replace fan on motor shaft. Make sure setscrew is touching back of flat sur- face on motor shaft (see Figure 10).

16.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds).

17.Remove two nuts and bolts securing motor mount to shell.

18.Pull motor and fan from shell. Turn motor and fan around. Carefully place back in shell. Note: Fan will go into shell first.

19.Line up mounting holes in shell with holes on motor mount. Replace four bolts through shell and motor mount. Insert bolts from outside of heater. Tighten nuts firmly.

20.Route motor wires through hole in bot- tom of shell (see Figure 7).

21.Connect motor wires as follows (see Figure 6):

•white wire—to terminal board. Note: Attach to empty connector on white wire side of terminal board.

•black wire—to terminal board. Note: Attach to empty connector on black wire side of terminal board.

•blue wire—to thermal switch wire

•orange wire—to solenoid valve

•green wire—to grounding screw on shell

22.Replace side cover.

23.Replace fan guard.

	026
Solenoid Valve	Fan
	Figure 8 - Fan and Motor Turned Around

Figure 6 - Location of Motor Wires

Fan	Hub	Motor
	Setscrew
		Shaft
		Setscrew
	ON	LP-P

Figure 10 - Fan Cross Section

Mounting	Motor
Bolts			Motor shaft
Motor	Mount
Wires		Figure 9 - Fan, Motor Shaft, and Setscrew
		FAN	LP-PFA/P 023A
Figure 7 - Location of Fan and Motor		Location

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