
BECKETT
CF3500
COMMERCIAL OIL BURNER
Overall Dimensions
22.5
28.0 Min.
39.0 Max.
Specifi cations
Fuels
Firing Range
Motor 
U.S. #1 or #2 heating oil only (ASTM D396) 
Canada #1 stove oil or #2 furnace oil only
                 DO NOT USE
                  GASOLINE,              
CRANKCASE OIL, OR ANY OIL 
CONTAINING GASOLINE.
17.0 to 35.0 gph
2 HP 3450 rpm 
208/230/60 Hz Standard
13.4 amps @ 230 VAC
7.88
8.00
12.7
Typical Burner Sequence of Operation - 7505
9
4
Pump 
Prime
Lockout
2
Valve-on 
Delay
1
3
5
Standby
Trial for 
Ignition
Ignition
Carryover
8
Motor-off 
Delay
6
Run
7
Recycle
5.3
14.7
Optional Voltages: 
   208, 230, 480, 575 VAC/3-PH, 
   50 or 60 Hz
Ignition Trans.
Housing
Fuel Unit
Oil Nozzle
Continuous Duty, 120V/12,000V
Cast aluminum
100 to 300 psig
45o to 70o Solid
Features
S - Standard    O - Optional    N/A - Not Available
On/Off N/A
Linkageless Low/High/Low or Low/High/Off S
Air Proving Switch S
Direct Spark Ignition of Main Flame S
Flame Safeguard with UV Sensor or Light Sensor O
Customized Electrical Cabinet O
UL/CUL - CSD1 - XL GAPS 
FM O
IRI (old standard) O
www.beckettcorp.com
1
Two-pipe Oil Flow
200 - 300 
PSIG
200 - 300 
PSIG
S
R.W. Beckett Corporation ● Elyria, Ohio

Typical Wiring (Honeywell RM7897A control)
 Combustion Chamber Dimensions
Firing Rate
(gph)
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”
Minimum Dimensions
AL
L
A
2305