Reznor OH Unit Installation Manual - Manual (Page 8)

Form I-OH, PN 120390 R5, Page 8
6. Mechanical
(cont'd)
6.1 Fuel Tank and Supply Lines (cont'd)
FIGURE 5 - Two-Pipe Supply
System (standard 1-stage or
optional 2-stage burner pump)
Fuel Unit
Auxiliary
Filter
Inlet
Lift
3-4”
(76-102mm)
Return
Line
Air
Vent
Fill
Pipe
Oil
Tank
Maximum horizontal supply
line length in TABLE 5
Return
Line
Maximum Horizontal Supply Line Length for
Two-Line System (Supply and Return)
Lift Std 1-stg pump Opt 2-stg pump
ft (M) 3/8" OD 1/2" OD 3/8" OD 1/2" OD
0 (0) 84 (25.6) 100 (30.5) 93 (28.3) 100 (30.5)
1 (.3) 77 (23.5) 99 (30.1) 88 (26.8) 99 (30.1)
2 (.6) 71 (21.6) 98 (29.8) 83 (25.3) 98 (29.8)
3 (.9) 65 (19.8) 97 (29.5) 78 (23.8) 97 (29.5)
4 (1.2) 59 (18) 96 (29.3) 73 (22.2) 96 (29.3)
5 (1.5) 52 (15.8) 95 (29) 68 (20.7) 95 (29)
6 (1.8) 46 (14) 94 (28.6) 63 (19.2) 94 (28.6)
7 (2.1) 40 (12.2) 93 (28.3) 58 (17.7) 93 (28.3)
8 (2.4) 34 (10.3) 92 (28) 52 (16) 92 (28)
9 (2.7) 27 (8.2) 91 (27.7) 47 (14.3) 91 (27.7)
10 (3) 21 (6) 90 (27.4) 42 (12.8) 90 (27.4)
11 (3.3) 15 (4.5) 89 (27.1) 37 (11.3) 89 (27.1)
12 (3.6) 9 (2.7) 71 (21.6) 32 (9.8) 88 (26.8)
13 (3.9) 49 (14.9) 27 (8.2) 87 (26.5)
14 (4.2) 27 (8.2) 22 (6.7) 86 (26.2)
16 (4.8) 11 (3.4) 84 (25.6)
18 (5.4) 58 (17.7)
6.1.3 Loop System
The loop piping system uses the standard single-stage burner pump and an optional
boost pump (Option DA1 or DA2; see Paragraph 6.1.5.). A loop system is one in which
a boost pump supplies fuel oil from the supply tank to individual heaters in excess of
burner requirements. The fuel oil is returned to the supply tank. This system should
not be operated at line pressures greater than 3 psi at the first burner supplied. Boost
pump operates full time during the heating season.
NOTE: If a two-foot rise cannot be maintained, use Pressurized System, Paragraph
6.1.4.
FIGURE 6 - Loop
Supply System
for Multiple Unit
Installation
Boost pump must
run continuously.
See Paragraph 6.1.5.
Vent
Manifold
Line
2 ft
(.6M)
min
Feeder Lines
Maximum intake
gauge pressure
at first burner
is 3 PSI.
1/2”
Pipe
Vent
(Outdoors)
Filler
Boost
Pump
Inlet - 1/2” OD
Tubing
35 ft (10.7M)
Maximum
Auxiliary Filter
1/2” OD Tubing
Shutoff Valve
Return 1/2” OD Tubing
15 ft (4.5M)
Maximum
Lift
Tank
Suspended Furnaces
TABLE 6 - Maximum Horizontal
Supply Line Length with Two-Pipe
Supply System (ft/M) - All OH Sizes
6.1.2 Two-Pipe Supply System with Standard Single-Stage Pump
or Optional Two-Stage Pump (cont'd)