A TYPICAL HEATER INSTALLATION - FIGURE 10

Refer to pages 2, 3, and 4 in this manual for more information about burner series numbers and characteristics for adaptability to the following systems.

SYSTEM TYPES

Single Stage, Supply Line Only: The bottom of the oil storage tank must be above the level of the fuel unit, fig. 11. The fuel oil will flow by gravity to the burner. A single pipe is run between the tank and fuel unit. Burner Series No. 940 is from this type of service as shipped (the bypass plug is not installed).

TABLE 6

Distance

Max.

 

Distance

Max.

Tank

Run length

 

Tank

Run Length

Bottom

Ft. (M)

 

Bottom

Ft. (M)

Below

 

 

 

Below

 

 

 

 

 

 

 

Pump

3/8"

1/2"

 

Pump

3/8"

1/2"

Plug

O.D.

O.D.

 

Plug

O.D.

O.D.

Ft. (M)

Tubing

Tubing

 

Ft. (M)

Tubing

Tubing

1 (0.3)

66 (20.1)

100 (30.4)

 

6 (1.8)

36 (10.9)

100 (30.4)

2 (0.6)

55 (16.7)

100 (30.4)

 

7 (2.1)

31 (9.4)

100 (30.4)

3 (0.9)

50 (15.2)

100 (30.4)

 

8 (2.4)

26 (7.9)

100 (30.4)

4 (1.2)

45 (13.7)

100 (30.4)

 

9 (2.7)

21 (6.4)

83 (25.2)

5 (1.5)

40 (12.1)

100 (30.4)

 

10 (3.0)

16 (4.8)

64 (19.5)

Two Stage, Supply and Return Lines: This system, fig. 13, is required when long lines and high lifts (requiring up to 20" of vacuum and 10' vertical lift) are encountered. Burner Series No. 941 is used in this service. Bypass plug must be installed.

A GRAVITY FEED, SUPPLY LINE ONLY, INSTALLATION

FIGURE 11

If the bottom of the oil tank is at least 2 inches (50.8 mm) higher than the plug opening at which the supply line connects to the fuel pump, a single- line gravity-feed system with 3/8" O.D. tubing may be used with a maximum run length of 100 feet.

A two stage pump may be used on one line, gravity feed installations. The pump will function as a single stage unit when the by-pass plug is not installed.

Single Stage, Supply and Return Lines. This type of system, fig. 12, is self-priming. Burner Series No. 940 with by-pass plug field installed, is for this type of service.

If the tank bottom is no lower than 10 feet below the plug, a single stage pump may be used but, it must be a two line system with maximum tubing runs (which includes lift) as shown in Table 6.

A SINGLE STAGE (LOW LIFT), SUPPLY AND RETURN

LINE INSTALLATION - FIGURE 12

A TWO STAGE (HIGH LIFT), SUPPLY AND RETURN

LINE INSTALLATION - FIGURE 13

If the tank(s) bottom is lower than the plug by more than 10 feet, a two stage pump with a two line system must be used with maximum tubing runs (which includes lift) as shown in Table 7.

TABLE 7

Distance

Max.

 

Distance

Max.

Tank

Run length

 

Tank

Run Length

Bottom

Ft. (M)

 

Bottom

Ft. (M)

Below

 

 

 

Below

 

 

 

 

 

 

 

Pump

3/8"

1/2"

 

Pump

3/8"

1/2"

Plug

O.D.

O.D.

 

Plug

O.D.

O.D.

Ft. (M)

Tubing

Tubing

 

Ft. (M)

Tubing

Tubing

1 (0.3)

74 (22.5)

100 (30.4)

 

9 (2.7)

51 (15.5)

100 (30.4)

2 (0.6)

71 (21.6)

100 (30.4)

 

10 (3.0)

48 (14.6)

100 (30.4)

3 (0.9)

69 (21.0)

100 (30.4)

 

11 (3.3)

45 (13.7)

100 (30.4)

4 (1.2)

66 (20.1)

100 (30.4)

 

12 (3.6)

42 (12.8)

100 (30.4)

5 (1.5)

63 (19.2)

100 (30.4)

 

13 (3.9)

39 (11.8)

100 (30.4)

6 (1.8)

60 (18.2)

100 (30.4)

 

14 (4.2)

37 (11.2)

100 (30.4)

7 (2.1)

57 (17.3)

100 (30.4)

 

15 (4.5)

34 (10.3)

100 (30.4)

8 (2.4)

54 (16.4)

100 (30.4)

 

 

 

 

MULTIPLE HEATER FUEL LINES

Where two or more heaters form a water heating system, each burner shall have an entirely separate oil supply line from the tank to the burner.

BURNER INSTALLATION

GENERAL

An oil Burner Certificate is packed with the oil burner. Following the burner manual installation the necessary tests shall be performed and the results recorded on the certificate, see BURNER CERTIFICATE. The certificate and this instruction manual must be left with the user for future reference.

Check to be certain the heater and burner model numbers are alike and the oil pump characteristics are proper for the job. See IDENTIFICATION, page 3.

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A.O. Smith COF-199 manual Burner Installation, Typical Heater Installation Figure, System Types, Multiple Heater Fuel Lines