FD Series
The FD series steel boiler combines Burnham ingenuity with expert design for oil, gas, or a combination of both for commercial installations. With forced draft firing, the FD series requires less space than conventional boilers and eliminates the need for external draft devices such as a high chimney or mechanical draft equipment. Besides providing abundant space heating and domestic hot water, the FD series is an ideal indirect hot water supply source for spas, car washes, laundries, commercial swimming pools, and restaurants. 264 to 1,607 MBH capacity.
Standard Equipment
All Boilers- Vertical (horizontal optional) tube type steel boiler with commercial grade 3" diameter tubes
- Insulated deluxe jacket
- Combination pressure temperature gauge
- 30 psi ASME safety relief valve
- High/Low limit control - L4081A
- M&M #764 low water cut-off (all sizes except FD-7 and FD-9)
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Oil Firing - Beckett Burners- Forced draft oil burner for #2 fuel oil
- Burner mounted two-stage fuel pump
- Ignition transformer and oil valve
- Cad cell primary control
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Gas Firing - Power Flame JR Series Burners- Forced draft burner for natural or LP gas
- Ignition transformer
- Gas pressure regulator
- Air flow safety switch and dual gas valves
- R7795B flame safeguard control with flame rod sensor - FD-7 to FD-24
- R7795A flame safeguard with ultraviolet flame sensor - FD-30 to FD-45
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Gas/Oil Firing - Power Flame CR Series BurnerForced draft burner for gas/#2 fuel oil- Ignition transformer
- Air flow safety switch and dual gas valves
- R7795A flame safeguard control with ultraviolet flame sensor
- Gas pressure regulator and manual fuel changeover switch
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Rating Data
| Boiler # |
Gross Output MBH |
Boiler HP |
Net Water Rating MBH¹ |
Oil GPH² |
Gas MBH |
Max. Tankless Cap. GPM³ |
H20 Cont. of Boiler (gal) |
| FD-7* |
250 |
7 |
217 |
2.3 |
331 |
5 |
44 |
| FD-9* |
300 |
9 |
268 |
2.75 |
397 |
6 |
52 |
| FD-10 |
350 |
10 |
304 |
3.1 |
447 |
7 |
80 |
| FD-12 |
439 |
13 |
381 |
4.0 |
577 |
8 |
77 |
| FD-14 |
507 |
15 |
440 |
4.5 |
649 |
9 |
94 |
| FD-15 |
558 |
16 |
485 |
5.0 |
721 |
10 |
91 |
| FD-19 |
680 |
20 |
591 |
6.0 |
865 |
12 |
87 |
| FD-24 |
856 |
25 |
744 |
7.5 |
1082 |
16 |
109 |
| FD-30 |
1062 |
31 |
923 |
9.5 |
1370 |
20 |
153 |
| FD-38 |
1383 |
41 |
1202 |
12.0 |
1730 |
24 |
189 |
| FD-45 |
1620 |
47 |
1391 |
14.0 |
2019 |
28 |
177 |
*Not available in optional horizontal package.
¹Net ratings shown here are based on a piping and pick-up allowance of 1.15. Consult manufacturer for installations
having unusual piping and pick-up requirements, such as intermittent system operation, extensive piping systems, etc.
²Firing rate in GPH is based on oil having a heat value of 140,000 BTU/gal
³Tankless heater ratings based on gal/min of 100° F rise with 200°F boiler water temperature and 40°F heater inlet
temperature (continuous draw).
FD Series Information and Documentation
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