Beckett CF1400 manual Pre-Installation Checklist, Combustion Air Supply, Clearances

Section: Pre-Installation Checklist

Pre-Installation Checklist

Combustion Air Supply

Adequate Combustion and

Ventilation Air Supply Required

Failure to provide adequate air supply could result in asphyxiation, explosion or fire hazards.

yThe burner cannot properly burn the fuel if it is not supplied with a reliable combustion air source.

yFollow the guidelines in the latest editions of the NFPA 31 and CSA-B139 regarding providing adequate air for combustion and ventilation.

The burner requires combustion air and ventilation air for reliable operation. Assure that the building and/or combustion air openings comply with National Fire Protection Standard for Oil-Burning Equipment, NFPA

31.For appliance/burner units in confined spaces, the room must have an air opening near the top of the room plus one near the floor, each with a free area at least one square inch per 1,000 Btu/hr input of all fuel burning equipment in the room. For other conditions, refer to NFPA 31 (CSA B1139-M91 in Canada).

If there is a risk of the space being under negative pressure or of exhaust fans or other devices depleting available air for combustion and ventilation, the appliance/burner should be installed in an isolated room provided with outside combustion air.

Clearances

With the burner installed in the appliance, there must be adequate space in front of and on the sides of the burner to allow access and operation. Verify that the clearance dimensions comply with all local codes and with the appliance manufacturer’s recommendations.

Fuel Supply

Oil Supply Pressure

Control Required

Damage to the filter or pump seals could cause oil leakage and a fire hazard.

yThe oil supply inlet pressure to the burner cannot exceed 3 psig.

yDo not install valves in return line.

yInsure that a pressure limiting device is installed in accordance with the latest edition of NFPA 31.

yGravity Feed Systems: Always install an anti-siphon valve in the oil supply line or a solenoid valve (RWB Part # 21789) in the pump/nozzle discharge tubing to provide backup oil flow cut-off protection.

The fuel supply piping and tank must provide #1 or #2 fuel oil at pressure or vacuum conditions suitable for the fuel unit (oil pump) on the burner. Refer to fuel unit literature in the literature envelope in the burner carton to verify allowable suction pressure.

If fuel supply is level with or higher than fuel unit:

○When the fuel unit is not required to lift the oil, the installation is usually suitable for either a one-pipe or two-pipe oil system. The oil pressure at the inlet of the fuel unit must not exceed 3 psig.

○The fuel unit is shipped with the by-pass plug installed. Leave the by-pass plug installed for all low/high firing burners, regardless whether one- pipe (with by-pass loop) or two-pipe. See Figure 9 for installation of the by-pass loop required for one-pipe fuel supply installations. See Figure 10 for connections to the fuel unit for two-pipe fuel supply installations.

When fuel supply is below the burner fuel unit:

○Use a two-pipe oil system when the fuel unit must lift the oil more than 8 feet. The return line provided by the two-pipe system is needed to minimize the effects of air-related problems during operation.

Nozzle Pressure

Correct Nozzle and Flow

Rate Required

Incorrect nozzles and flow rates could result in impaired combustion, under- firing, over-firing, sooting, puff-back of hot gases, smoke and potential fire or asphyxiation hazards.

Use only nozzles having the brand, flow rate (gph), spray angle and pattern specified by the appliance manufacturer.

Follow the appliance manufacturer’s specifications for the required pump outlet pressure for the nozzle, since this affects the flow rate.

yNozzle manufacturers calibrate nozzle flow rates at 100 psig.

yThis burner utilizes pressures higher than 100 psig, so the actual nozzle flow rate will be greater than the gph stamped on the nozzle body. (Example: An 8.00 gph nozzle at 150 psig = 9.80 gph and at 300 psig = 13.86 gph)

yFor typical nozzle flow rates at various pressures refer to Table 1.

4