4.Remove logs. Carefully lift top logs straight up until pins are clear of lower logs

(see Figure 3). Continue removing logs one at a time. The rear log is very heavy and should be lifted with both hands. Place logs away from your work area. Be careful not to damage logs.

Figure 2 - Removing Front Refractory

Access Panel

Figure 3 - Removing Logs Set

Main Burner Orifice

Conversion

1.Using a #10 short Phillips screwdriver, remove top mounting screw holding pilot burner shield in place (see Figure 4).

2.With orifice mount exposed, use a 7/8" open-end back-up wrench on 3/8" flare adapter and remove 3/8" flare fitting at the end of 3/8" flare adapter. This will prevent spinning and damage to the flexible tube (see Figure 4).

3.Using the 7/8" wrench, remove the remain- ing orifice assembly from the burner tube.

4.Separate the 3/8" male flare adapter from the existing natural gas orifice fitting and save for later reassembly.

5.Thread the propane/LP gas orifice into the propane/LP gas air-mixer fitting using a

3/8" deep socket driver. Note: LP gas air- mixer fitting has six (6) holes. The natural gas fitting has no holes.

6.Apply a light amount of propane/LP resis- tant sealant to both threaded ends of LP air-mixer fitting.

7.Thread large threaded end of propane/

LP air-mixer fitting into burner tube and tighten with 7/8" wrench until flange is fully-seated into bracket.

8.Replace 3/8" flare adapter onto exposed thread on propane/LP gas air-mixer fit- ting. Use 7/8" back-up wrench on fitting to prevent turning burner tube.

9.Retighten flare fitting on flexible manifold tube with the 3/4" open-end wrench and 7/8" back-up wrench.

10.Reattach pilot shield onto burner bracket with screw removed in step 1.

3/8" Deep Socket

Propane/LP

Gas Orifice

 

Propane/LP

 

Gas Air-

Flange

Mixer Fitting

Pilot Burner

 

 

Shield

#10 Phillips

Burner Screw

Bracket

 

 

3/8" Flare

 

 

Adapter

Burner

7/8" Back-Up

Tube

Wrench

3/8" Flare Fitting

Natural Gas

 

Orifice Fitting

Figure 4 - Removing/Replacing Main

Burner Orifice

www.desatech.com108805-01C

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Desa PCBM-325 installation instructions Main Burner Orifice Conversion, Removing Front Refractory Access Panel
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PCBM-325 specifications

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