Prepare site • prepare burner • mount burner, Model ezgas pro gas burner — instruction manual – Carlin EZGasPro User Manual

Page 7

Model EZGas Pro gas burner — Instruction manual

Carlin part number MNEZGas Rev. 10/28/13

– 7 –

Where appliance instructions differ from this manual, follow the appliance instructions.

1. Prepare site • prepare burner • mount burner

(continued)

Inspect burner and components

Do not install or operate the burner if any component is dam-

aged or if burner does not comply with the specifications or
any other guidelines in this manual.

Air tube insertion length (UTL)
•

Usable air tube length (UTL) is the distance from mounting flange to end of air
tube. Verify that the end of the air tube will be flush with, or no more than ¼ inch
short of, the inside of the appliance combustion chamber front wall when the
burner is mounted. See Figure 3 and Table 1 below for further information.

Diffuser plate

•

Verify correct diffuser plate (item 2, page 3). Compare diffuser plate listed on air
tube label with diffuser plate listed in Table 1.

Gas orifice drill size

•

The gas orifice is drilled through a plate in the end of the orifice nipple (see item
6, page 3). Read the factory-drilled orifice size on the label attached to the burner
air tube (see item 1, page 3) near the blower housing end. If the gas orifice size
is not correct for your application, or if the label is illegible for any reason, check
the orifice size directly and redrill orifice or replace if necessary, as follows (next
page).

Figure 3

Combustion chamber dimensions (see Table 1)

Table 1 Burner specifications for EZGas Pro burners

Appliance

Diffuser

Air Band

Input BTU

Nat Gas

Propane

Plate

Type

C Diffuser

B Diffuser

A Diffuser

9-Slot Diff

Note 1

Note 3

50,000 - 75,000

5/32

1/8

1-Slot

75,000 - 100,000

3/16

9/64

B or 9-Slot

1-Slot

15%

100,000 - 125,000

7/32

11/64

B or 9-Slot

1-Slot

20%

30%

125,000 - 150,000

1/4

13/64

B or 9-Slot

1-Slot

30%

40%

150,000 - 175,000

9/32

7/32

B or 9-Slot

1-Slot

45%

70%

175,000 - 200,000

5/16

1/4

A or 9-Slot

2-Slot

30%

45%

Tube Length

UTL min.

UTL max.

200,000 - 225,000

5/16

1/4

A or 9-Slot

2-Slot

35%

60%

10"

1 3/4"

3 1/2"

225,000 - 250,000

11/32

9/32

A or 9-Slot

2-Slot

45%

75%

1 3/4"

5 1/2"

250,000 - 275,000

13/32

5/16

2-Slot

55%

1 3/4"

7 1/2"

Note 2

Note 3

Note 4

C/L

3 1/2

8 1/2

9 1/2

4 1/2

For BTU ranges that are covered by both the 9-Slot Diffuser Plate and the A or B Diffuser Plate, it is likely that either diffuser will work, but one may

provide better combustion. The 9-slot's short flame pattern favors appliances with shorter combustion chambers.
Use this as the starting setting only. Adjust air band setting, if necessary, after performing combustion testing (see page 13).

Minimum Chamber Dimensions (in inches)

(VC= min. diam. Of vertical cylinder chamber)

Notes 3, 4, 5

Some tested appliances may operate satisfactorily with dimensions less than those
noted in the table.

Note 3

Horizontal cylindrical chambers - diameter must be no less than column W.

Horizontal stainless steel cylindrical chambers - diameter at least 1 to 4 inches
larger than column "W" above.
A corbel may help heat transfer in a larger boiler of furnace, provided it is
recommended by the appliance manufacturer.

Note 4

Note 5

Note 1

Firing rate should be within +/- 5% of rated input for the appliance. High altitude applications: The maximum burner input at sea level is 275,000 Btuh.

Reduce this capacity by 4% per 1,000 feet above sea level. Example- max. capacity at 5,000 feet is 220,000 Btuh (20% reduction). Pressurized firing:

Maximum burner input decreases with increasing overfire pressure. Assume a reduction in maximum burner input of approximately 5% at 0.1 w.c. and

10% at 0.2 inches w.c You will have to increase the air band opening to compensate for the increased pressure. Follow the procedures given in this

manual to check combustion with instruments to determine the correct air band setting. Do not fire into a chamber with pressure higher than 0.2 inches

w.c. and never fire at a higher pressure than recommended by the appliance manufacturer.

Burners with welded flange have fixed
insertion depths. Verify the insertion depth is
correct for the appliance. On burners with
adjustable flanges, the Usable Tube Length
(UTL) available for setting the insertion depth
varies with air tube length:

Once the orifice is drilled, minor adjustments to the firing rate can be achieved by adjusting the gas valve outlet pressure between 3.2" and 3.8" w.c. If

the rate remains too low, re-drill the orifice with a 1/64" larger bit (for details, see Make Final Burner Adjustments in Section 4 of this manual.)

Note 2

Note 4

Usable Tube Length

for Insertion Depth

Approx. Air Band Setting

Orifice Drill Size