Desa GVC50NA Blower Wiring, Diagram, Service Procedures, Continued, Changing Burner Orifice

SERVICE PROCEDURES

Continued

Changing Burner Orifice

1.Shut off gas supply to heater.

2.Remove lower front access panel on heater.

3.Disconnect burner tube from orifice holder (see Figure 20).

4.Remove orifice holder from burner (see Figure 20).

5.Use socket or open-end wrench to remove the old orifice from the orifice holder.

6.Clean and replace orifice, or replace with new orifice.

7.Turn on gas to heater and check for gas leaks. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

8.Replace lower front access panel.

BLOWER

WIRING

Burner

Orifice

Burner

Tube

Orifice

Holder

Figure 20 - Orifice Location (35,000 BTU/Hr Burner Shown)

Figure 21 - Orifice

Fan Switch

(Off/On/Auto)

Auto

Off

On

Red

Fan

DIAGRAM

(For Models With Blower Assembly)

30

Black Blue

110/115 V.A.C.

Black

White

Green

Switch (N.O.)

Black

Blower

Motor

Red

White

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