Utica Boilers MGB Series II/MGC Series Operation and Installation Manual

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CONVERSION KIT INSTRUCTIONS

NATURAL DRAFT CAST IRON SERIES II GAS FIRED BOILERS FOR FORCED HOT WATER

NATURAL GAS TO LP CONVERSION

MGB/OMGB/MCB/DXL SIZES THROUGH 200 MBTU Kit #'s 550002663, 550002664, 550002665

! WARNING

Conversion kit shall be installed by qualified service agency in accordance with manufacturer's instructions and all applicable codes and requirements of authority having jurisdiction. If information in these instructions is not followed exactly, a fire, explosion or production of carbon monoxide may result causing personal injury or loss of life. Qualified service agency is responsible for proper installation of this kit. Installation is not proper and complete until operation of converted appliance is checked as specified in manufacturer's instructions supplied with the kit.

Tools Required

Flat Head Screwdriver

1/4” Nut Driver

7/16” Open Ended Wrench

3/16” Allen Wrench

18” Manometer (or dial manometer)

Converting Boiler From Natural Gas To Propane (LP):

1.Follow instruction TO TURN OFF GAS TO APPLIANCE. Verify electrical power is OFF.

2.Remove front panel.

3.Remove burner access door.

4.Remove main gas burner tubes. See Figure 1.

5.Remove main burner orifices. See Figure 1.

6.Install LP gas main burner orifices. Discard excess LP orifices.

7.Use 7/16” wrench, disconnect pilot tube from pilot. See Figure 2.

8.Remove pilot orifice.

9.Install LP gas pilot orifice.

10.Apply liquid sealing compound (provided) to threads of pilot assembly fitting.

11.Reattach pilot tube to pilot and securely tighten. See Figure 2.

12.Replace main gas burner tubes.

TABLE 1 - Kit #

550002663

 

550002664

550002665

 

 

 

 

 

Model

50/100/

 

75

125/170

150/200

 

 

 

 

 

 

 

 

 

 

DESCRIPTION

PART #

 

PART #

PART #

(QTY)

 

(QTY)

(QTY)

 

 

Pilot Orifice - Spark

 

 

PB00208 (1)

 

 

 

 

 

Orifice

# 47 (4)

 

# 50 (2)

# 49 (4)

 

 

 

 

 

Label, "Nat to LP"

 

240004822 (1)

 

Conversion Plate

 

 

 

 

 

 

Liquid Sealing

 

140010 (1)

 

Compound

 

 

 

 

 

 

Spring Kit

 

1272030 (1)

 

Instructions

 

240009725 (1)

 

 

 

 

 

 

Figure 1 - Burners Assembly

Figure 2 - Pilot Assembly

Pilot

Pilot Orifice

Pilot Tube

P/N 240009725, Rev. C [10/2012]

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