Alfresco ALX230LP Gas Conversion

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Gas Supply Conversion and Orifice Replacement Guide

PURPOSE:

If a barbeque or side burner unit is to be operated with a different gas supply other than the one
provided by the factory, a conversion kit is required. This change must be done in order to ensure that:

• The unit is safe to operate.

• The unit has correct combustion of gas.

• The unit outputs the expected heat (BTUH’s).

• Your warranty is maintained.

By changing from Natural Gas (NG) to Liquid Propane (LP) or vice versa, the heat output as well
as the regulating pressure and oxygen content of the gas/air mixture also changes. Therefore a change
in orifice (gas injector) size is required, (usually larger or smaller depending on the application), as well
as a change in the main pressure regulator setting to allow for proper gas pressure to the valves and
burners.

On the next pages you will find the necessary information to replace orifices, adjust burners and
convert pressure regulators to suit your application. This information is generalized due to the different
models manufactured, nevertheless it applies to all of them in the same fashion as it indicates the loca­tion and how to access orifices and regulators.

For additional information, all conversion kit numbers and components are listed at the end of this
guide in the appendix section.

WARNING:

As the unit will be partially disassembled during gas supply conversion and orifice replacement, it
is necessary to remove all power sources to the unit (including but not limited to: barbeques lights, rotis­serie motor and igniter module batteries) as well as all gas supplies (Natural gas or Liquid propane).

Alfresco Gourmet Grills recommends a qualified gas technician to perform this service.

HOW TO OBTAIN SERVICE:

For warranty, service, contact your local Alfresco Gourmet authorized service agency. Pro­vide him with the Model # and Serial # (located under drip pan), date of installation, and a brief de­scription of the problem. If you need assistance in locating the authorized service agency in your
area, contact your local dealer. He will have a listing of authorized service agents in you area.

We want you to remain a satisfied customer. If a problem occurs that cannot be resolved to
your satisfaction, please us know. Write Alfresco Gourmet Grills. Customer Service Department.
7039 East Slauson Ave, Commerce, CA 90040. Or call Customer Service/Parts at [phone]

or [phone] or fax us at [phone]. Visit us at: www.alfrescogrills.com

WARNING

ELECTRICAL PARTS

AND COMPONENTS

DISCONNECT ALL POWER
SUPPLIES AND BATTERIES
BEFORE SERVICING

WARNING

FLAMMABLE GAS

DISCONNECT ALL PROPANE
OR NATURAL GAS SUPLIES TO
THIS UNIT BEFORE SERVICING

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BARBEQUES:

A typical barbeque unit will have the following burner components:

MODEL:

SMOKER "U" BURNER SEAR-ZONE™ ROTISSERIE SIDE BURNER

AGBQ-30 1 2 ~ 1 ~

AGBQ-30SZ 1 1 1 1 ~

AGBQ-30IR 1 ~ 2 1 ~
AGBQ-42 1 3 ~ 1 ~

AGBQ-42SZ 1 2 1 1 ~

AGBQ-56 1 3 ~ 1 2

AGBQ-56SZ 1 2 1 1 2

AGBQ-56BFG 1 3 1 1 ~

AGSB-2 ~ ~ ~ ~ 2

AGSB-SZ ~ ~ 1 ~ ~

BURNER QUANTITIES:

TYPICAL BARBEQUE

Figure 1

FRONT PANEL

SMOKER TRAY

STEPS:

KNOBS

DRIP TRAY

Figure 2

1– Remove the knobs from the valve stems by pulling them straight out of the valve stems.

2– Remove the smoker and drip trays.

3– Remove the front panel screws (4) located at each corner (2 facing down and 2 on the upper corners)

4– Remove the front panel to expose valves, gas manifold and igniter assembly. (Figure 2)

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Barbeques cont.

5– Remove warming rack, grills, briquette trays and “U” burners from the barbeque unit. (Figure 3)

6– Should your barbeque unit be equipped with a Sear-Zone™ burner, also remove it. (Figure 4)

WARMING
RACK

GRILL

BRIQUETTE
TRAY

“U” BURNER

(Figure 3)

SEAR-ZONE™
BURNER

(Figure 4)

“U” Burner orifice
Location at end of
Brass nipple.

(Figure 6)

(Figure 5)

7– Now that the gas manifold and valves are exposed (Figure 5), remove and replace each valve’s
orifice for the proper gas supply, Natural Gas or Liquid Propane. Standard “U” burners have an
angled valve with an orifice located in the valve’s body, on the back at the end of an adapter nipple.
(Figure 6)

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Barbeques cont.

8– If your unit is equipped with a Sear-Zone™ burner, the valve has an orifice mounted externally to the
valve body. The orifice is directly attached to the barbeque fire box with a bracket and connected to
the valve with a flexible stainless tube. (Figure 7)
It is mounted on this bracket along with the Sear-Zone™ igniter electrode. Remove and replace this
orifice from the inside of the firebox. (Figure 8)

VALVE BODY ELECTRODE

FLEXIBLE
PIPING

SEAR-ZONE™
ORIFICE

MOUNTING
BRACKET

(Figure 7)

(Figure 8)

9– The smoker unit’s orifice is also mounted externally from the control valve body. It is connected with a
small 3/16” Ø aluminum tube. The orifice is mounted on a bracket attached to the fire box.
To replace this orifice, remove the mounting bracket from the fire box and gently bend the aluminum
tubing outward to prevent kinks. After replacement, re-install bracket / orifice assembly back into the
fire box. (Figure 9)

FIRE BOX

BRACKET

3/16ӯ ALUMINUM TUBING

(Figure 9)

SMOKER ORIFICE

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Barbeques cont.

10– To replace the rotisserie orifice, it must be accessed from the back of your barbeque unit.
Just like the Sear-Zone™ and the smoker unit, the rotisserie unit has an externally mounted orifice
connected to the valve body with a long flexible stainless tube.
Remove the rear rotisserie access plate (Figure 10) and locate the orifice on the compression fitting
that is mounted on the burner bracket( Figure 11). Replace orifice and re-install the access cover.

ACCESS
COVER

(Figure 10)

BRACKET

COMPRESSION FITTING

FLEXIBLE TUBING

ORIFICE

(Figure 11)

SIDE BURNERS:

Side burners can be found as separate units such as AGSB-2 (2 burner unit) and AGSB-SZ
(Sear-Zone™ unit) or built within the frame of the barbeque such as our AGBQ-56 model Deluxe Grill.

In either case, their respective orifices are installed and accessed in the same fashion. If a side
burner is part of a barbeque such as the Deluxe Grill, gas will be supplied to the burner from the same
manifold that feeds the main unit. All Individual units have their own pressure regulators.

If the side burner is part of a Deluxe Grill, the manifold will be accessed in the same fashion as shown on
page# 4 — item # 7. For all other side burners, follow the next few steps.

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AGSB-2 Dual Side Burner

STEPS:

1- A dual side burner unit AGSB-2 (Figure 12) has the orifices readily available. Simply remove the top
grate, burner external brass caps and inner aluminum caps. (Figure 13)

2– Orifices are accessible directly from the top( Figure 14). Remove and replace each orifice as required
and re-assemble the side burners.

GRATE

EXTERIOR CAP

INTERIOR CAP

(Figure 12)

TOP VIEW

(Figure 14)

(Figure 13)

Orifice
Located inside
burner body.

AGSB-SZ Sear-Zone™ Side Burner

STEPS:

1- A Sear-Zone™ side burner unit AGSB-SZ (Figure 15) has the orifice located inside the firebox
assembly in the same configuration as a barbeque grill. To access the orifice remove the top grate,
Sear-Zone™ burner, knob, drip tray and front control panel (Figure 16)

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