Model DP Oil-Fired Heater
Page 7
openings communicating with living areas.
2E.
Oil Piping
All XL-3 heaters are equipped with two-stage
fuel units. Water Pik Technologies recommends a
two-pipe system with a supply line and a return line
between the heater and the tank (see Fig. 10). When
using a two-pipe system, install the bypass plug in the
fuel unit. The plug is shipped in the small plastic bag
attached to the oil burner. The location for the plug is
shown on the decal on the end of the fuel unit.
Remove the large hex-head fitting and insert the plug,
Figure 9. Combustion Air, Indoor Installation.
Lift from
bottom of
Storage
tank to
Total Tubing
Length Allowed
fuel unit
3/8" dia.
1/2" dia.
0 ft. (0.0m)
68 ft. (20.7m)
100 ft. (30.5m)
2 ft. (0.6m)
63 ft. (1 9.2m)
100 ft. (30.5m)
4 ft. (1.2m)
58 ft. (17.7m)
100 ft. (30.5m)
6 ft. (1.8m)
53 ft. (16.2 m)
100 ft. (30.5m)
8 ft. (2.4m)
48 ft. (14.6m)
100 ft. (30.5m)
10 ft. (3.0m)
42 ft. (12.8m)
100 ft (30.5m)
12 ft. (3.7m)
37 ft. (11.3m)
100 ft. (30.5m)
14 ft, (4.3m)
32 ft. ( 9.8m)
100 ft. (30.5m)
16 ft. (4.9m)
27 ft. ( 8.3m)
100 ft. (30.5m)
18 ft. (5.5m)
22 ft. ( 6.7m)
88 ft. (26.8m)
Table 1. Fuel Line Sizes.
Figure 10. One-Pipe and Two-Pipe Systems.
