Adams Condensing Oil-Fired Furnace operation manual X. Circulating Air & Filters, 664805

The furnace may be installed with a one-pipe system with gravity feed or lift. The maximum allowable lift on a single line system is 8 feet. Lift should be measured from the bottom (outlet) of the tank, to the inlet of the burner. Sizing a single line system is complex because of the difficulty estimating the pressure drop through each fitting, bend and component in the line. In general, keep single line systems short as possible. Two-stage oil pumps are available for either the INTERburner or Beckett burner.

The following chart shows the allowable line lengths (horizontal & vertical) for single and two stage oil pumps. All distances are in feet.

In retrofit applications, where an existing oil line system is in place, a vacuum check will help determine the integrity of the eXisting oil line system. The vacuum in a system should not exceed 6" Hg. For a single pipe system, not 12" Hg. For a two-pipe system.

To eliminate air leakage, fuel line should be a continuous length from tank to burner and flare fittings must be used on all connections. On threaded connections, use pipe dope that is resistant to fuel oil (Rector seal #5, Permatex or eqUivalent). Do not use PTFE joint tape.

OIL LINES

Copper Tubing Oil Line Lengths (Feet)

Single-PipeTwo-Pipe

Lift	3/8"	Yo"	3/8"	Yo"
Ft.	0.0	0.0	0.0.	0.0.
	Tubing	Tubing	Tubing	Tubing
0	53	100	68	100
1	49	100	65	100
2	45	100	63	100
3	41	100	60	100
4	37	100	58	100
5	33	100	55	100
6	29	100	53	100
7	25	99	50	100
8	21	83	48	100
9	17	68	45	100
10	13	52	42	100
12	-	-	37	100
14	-	-	32	100
16	-	-	27	100
18	-­	-	22	88

For additional information, see the installation information sheet included in the documents envelope or affixed to the oil burner and R.W. Beckett Bulletin

(664805)

SoMng After Drip and Locating Oil Line Leaks Bulletin (664822).

NOTE: Both the INTERburner AND Beckett oil burners require the use of a bypass plug when converting from single-pipe to two-pipe oil piping systems. See burner manufacturer's instructions.

X. CIRCULATING AIR & FILTERS

Ductwork· Air Flow

Duct systems and register sizes must be properly designed for the CFM and external static pressure rating of the furnace. Design the ductwork in accordance with the recommended methods of "Air conditioning Contractors of America" Manual D. Install the duct system in accordance with Standards of the National Board of Fire Underwriters for the installation of Air Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets No. 90A and 90B.

A closed return duct system must be used, with the return duct connected to the furnace.

NOTE: Ductwork must never be attached to the back of the furnace.

Flexible joints may be used for supply and return connections to reduce noise transmission. To prevent the blower from interfering with combustion air or draft when a central return is used, a connecting duct must be installed between the unit and the utility room wall. Never use a room, closet, or alcove as a return air chamber.

No furnace will operate or heat properly if the duct work it is attached to is not sized or installed correctly. Warm air runs should have dampers installed so that they can be balanced room to room. Dampers should be adjusted to provide a minimum of 0.20 and a maximum of 0.50 inches water column external static pressure in the warm air plenum.

Keep in mind that 95% of all burner and pump problems are caused by three factors:

Air leak in the fuel line, Improperly sized fuel lines and dirty fuel.

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