General Installation Information; Combustion Chamber; Fuel Pumps; Fuel Lines - Wayne EHASR-DC Manual

Oil burners

Table of Contents

When installing the burner, be sure to provide adequate space for easy service and maintenance. Prior to installation of

the oil burner, the heating system should be carefully inspected for defects and cleanliness. The flue passages and heat

absorbing surfaces must be clean to ensure maximum heat transfer. Soot acts as an insulator, which decreases the

transfer of heat. The combustion chamber, flue gas passages, and openings must be tightly sealed to eliminate air

infiltration. Excess air cools the flame and thus lowers efficiency. Inspect the flue for leaks and obstructions.

COMBUSTION CHAMBER

The purpose of a combustion chamber is to maintain a high flame temperature by reflecting the heat back into the flame.

A high flame temperature assures higher combustion efficiency and lower stack losses. It is important to select and install,

the correct nozzle size for a given combustion chamber size (see Table 5 on page 35). On all oil burners the atomized oil

must not touch the sides or bottom of the combustion chamber or incomplete combustion will occur leading to smoke and

soot build-up. To reduce smoke while the burner is running, the burner must have an adequate supply of combustion air

by having a large enough opening on the air band assembly. If too much air is utilized it can lead to high gas exhaust

temperatures, and lower combustion efficiency. Install the burner according to the equipment manufacturer's guidelines.

FUEL PUMPS

Model EHASR-DC and EH-DC oil burners are provided with single stage 3450 RPM fuel pumps with the by-pass plug

removed for a single pipe installation. This is satisfactory where the fuel supply is on the same level, or above burner,

permitting gravity flow of oil.

may cause damage to the shaft seal and allow it to leak oil.

When it is necessary to lift the oil to the burner, a return line should be run between the fuel pump and oil tank. (If lift

exceeds 10 feet, a two stage fuel pump must be used with a return line). When a two line installation is made, the by-pass

plug must be installed. This is supplied with the burner attached to fuel pump, along with a pump data sheet in a plastic

bag.

causing an oil leak at the pump shaft seal.

FUEL LINES

Replace fuel lines with parts approved by the equipment manufacturer. Be sure that all connections are air-tight. Check all

connections and joints. Flared fittings are recommended. Do not use compression fittings. Avoid using fittings in

inaccessible locations. Install an UL certified oil filter of adequate size for all installations.

FUEL TANKS

Check existing tanks for water and sludge accumulation; clean if necessary. Also clean or replace existing piping.