Verify air tube – Beckett CF3500A User Manual
Page 6
6
Air Tube Combination Codes
Model
Tube
Dimension
T
Dimension
D
Code
Dimension
E
CF2500A/
CF2500
KP
6-3/4”
6-1/2”
CF 66 KP
3-1/4”
10-1/4”
6-1/2”
CF 102 KP
3-1/4”
13-3/4”
6-1/2”
CF 136 KP
3-1/4”
17-3/4”
6-1/2”
CF 176 KP
3-1/4”
CF3500
KM
8”
8”
CF 80 KM
4-1/2”
9-1/4”
8”
CF 92 KM
4-1/2”
11-1/2”
8”
CF 114 KM
4-1/2”
15”
8”
CF 150 KM
4-1/2”
19”
8”
CF 190 KM
4-1/2”
KR
11-1/2”
9-15/16”
CF 114 KR
5-1/8”
14”
9-15/16”
CF 140 KR
5-1/8”
19”
9-15/16”
CF 190 KR
5-1/8”
Firing Rate
(gph)
Minimum Dimensions
H
L
17
10.5”
48.0”
22
11.5”
58.0”
27
12.5”
66.0”
32
12.5”
73.0”
35
13.0”
77.0”
Section: Pre-installation Checklist
Figure 2 - Dimensions: Minimum Combustion
Chamber and Air Tube Mounting.
Figure 3a - Firebox Pressure: CF2500A with no Reserve Air
0.2
0.4
0.6
0.8
1.0
0.0
23
22
Firebox Pressure in Inches Water Column (W.C.)
Maximum Firing Rate U.S. GPH
KP
24
25
Figure 3b - Firebox Pressure: CF3500 with no Reserve Air
0.2
0.4
0.6
0.8
1.0
0.0
25
20
Firebox Pressure in Inches Water Column (W.C.)
Maximum Firing Rate U.S. GPH
KR
KM
30
35
* Install burner with
2° pitch as shown.
*2°
H
L
T
D
E
1/4” ± 1/8”
Verify Air Tube
The information in this section may be disregarded if the
air tube is supplied by the appliance manufacturer.
The following tube arrangements are available –
CF2500 - Tube KP -17.0.0 to 19.9 GPH
CF2500A - Tube KP -17.0 to 25.0 GPH
CF3500A - Tube KM -17.0 to 35.0 GPH or
Tube KR -17.0 to 35.0 GPH
Maximum fi ring capacity depends on the fi rebox
pressure. Use Table 2 to verify the correct air tube type
for the fi ring rate required. (Tube KR [CF3500A] is an
optional air tube combination for maximum capacity rate.
It requires a larger I.D. fl ange Number 51631.)
See Figure 2 to verify the correct air tube length and air
tube combination code.
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