Vanguard Heating GVB50P, GVB35P 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 24).

4.Remove orifice holder from burner (see Figure 24).

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.

Burner

Orifice

Burner

Tube

Orifice

Holder

Figure 24 - Orifice Location (35,000 BTU/Hr Burner Shown)

Figure 25 - Orifice

32

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