Beckett CG4 User Manual
Page 10
10
Section: INSPECT/PREPARE INSTALLATION SITE
Table 5 – Firing Rates and Configurations
Firing Rate
BTU/Hr.
Fuel Orifices
Air Tube Components
Chassis
Components
Initial Settings
Natural Gas
Orifice Dia.
Inches
L P Orifice
Dia. Inches
Burner
Head
Nozzle
Static Plate
Baffle
Band
Shutter
Band
80,000
0.219
0.166
F3G
01
32910-001
5880
Blank
2-1/2
Blank
90,000
0.234
0.177
F3G
01
32910-001
5880
Blank
4
Blank
100,000
0.25
0.189
F3G
01
32910-001
5880
Blank
5-1/2
Blank
110,000
0.277
0.206
F3G
01
32910-001
5880
Blank
7-1/2
Blank
120,000
0.316
0.219
F3G
01
32910-001
5880
4-slot
9
0
130,000
0.364
0.234
F3G
01
32910-001
n/a
4-slot
5-1/2
0
140,000
N/A
0.242
F3G
01
32910-001
n/a
4-slot
7-1/2
0
130,000
0.281
0.217
F4G
02
32910-001
5880
4-slot
8
0
145,000
0.316
0.234
F4G
02
32910-001
5880
4-slot
10
0
160,000
0.348
0.246
F4G
02
32910-001
n/a
4-slot
6-1/2
0
175,000
0.406
0.261
F4G
02
32910-001
n/a
4-slot
8-1/2
0
190,000
N/A
0.281
F4G
02
32910-001
n/a
4-slot
10
0
180,000
0.332
0.246
F6G
03
n/a
n/a
4-slot
5-1/2
0
190,000
0.354
0.256
F6G
03
n/a
n/a
4-slot
7
0
205,000
0.377
0.266
F6G
03
n/a
n/a
4-slot
8-1/2
0
220,000
0.422
0.281
F6G
03
n/a
n/a
4-slot
10
0
235,000
0.484
0.295
F6G
03
n/a
n/a
4-slot
10
2
250,000
N/A
0.312
F6G
03
n/a
n/a
4-slot
10
4
- Firing rates are based on 3.5” WC manifold gas pressure and use of the appropriate orifice for the fuel being fired.
- Air tube assemblies are provided with a full selection of the natural gas orifices appropriate to the burner head.
- LP orifices are provided in kits containing all the LP orifices for the burner head size. The installer is responsible
for selecting and installing the appropriate orifice for the application.
- Burner heads and nozzles are identified with the markings shown to assure the use of compatible combinations.
- Burner chassis are built for the highest rate configuration. The installer is responsible to add the baffle and/or
change the band as required for the application.
- Initial settings are intended for use only as a starting point for burner adjustments. They can not make provision
for all installation possibilities. It is important that you adjust your burner to your installation requirements using
properly calibrated flue gas analysis instruments.
Table 4 – Minimum Combustion Chamber Dims.
Chamber Dimensions (Inches)
H
W
L
A
Firing
Rate
MBH
Rectangular
Horizontal
Cylinder
I. D.
Length
(L)
Floor to
Tube (A)
Width
(W)
Height
(H)
80
8
8
9
13
4
105
9
9
10
13.5
4.5
140
10.5
10.5
12
14
5.3
175
11.5
11.5
13
14.5
5.8
210
13
13
14.5
15
6.5
250
15
15
16
16
7.5