Model EZGas Pro gas burner — Instruction manual
MNEZGas 011917
– 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
50,000 - 75,000
5/32
1/8
C
1-Slot
5%
75,000 - 100,000
3/16
9/64
B or 9-Slot
1-Slot
10%
20%
100,000 - 125,000
7/32
11/64
B or 9-Slot
1-Slot
25%
35%
125,000 - 150,000
1/4
13/64
B or 9-Slot
1-Slot
35%
45%
150,000 - 175,000
9/32
7/32
B or 9-Slot
1-Slot
50%
75%
175,000 - 200,000
5/16
1/4
A or 9-Slot
2-Slot
35%
50%
200,000 - 225,000
5/16
1/4
A or 9-Slot
2-Slot
40%
65%
225,000 - 250,000
11/32
9/32
2-Slot
50%
80%
250,000 - 275,000
13/32
5/16
A
A
2-Slot
60%
Note 2
Note 3
Note 4
3
7
6
8
7
3 1/2
8
7
9
8
3 1/2
9
7
9
8 1/2
4
11
8
10
9 1/2
4
12
8
10
10
4 1/2
14
8
11
12
4 1/2
15
9
11
13
4 1/2
16
9
11
14
4 1/2
17
9
11
15
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 star ng seng only. Adjust air band seng, if necessary, aer performing combus on tes ng (see page 13).
Notes 3, 4, 5
Some tested appliances may operate sa sfactorily 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 /- 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.
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
Approx. Air Band Seng
Orifice Drill Size
Note 3
Note 1
10"
1 3/4"
3 1/2"
12
1 3/4"
5 1/2"
14
1 3/4"
7 1/2"
Burners with welded flange have fixed
inseron depths. Verify the inseron depth is
correct for the appliance. On burners with
adjustable flanges, the Usable Tube Length
(UTL) available for seng the inseron depth
varies with air tube length:
Usable Tube Length
for Inseron Depth
Tube Length
UTL min.
UTL max.
(VC= min. diam. Of vercal cylinder chamber)
Minimum Chamber Dimensions
C/L
L
W
H
VC
