Lennox O23Q2-70, Руководство по установке

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Page 12
Manual bleeding of the fuel pump is required on initial start
up. Failure to bleed air from the oil pump could result in an
air lock/oil starvation condition.
NOTE − As an extra precaution, cycle heating on and off ten
times after bleeding air from the oil pump. This will elimi-
nate air in the gun assembly.
Figure 14
Oil Piping
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎ
air vent
fill
pipe
Oil
Tank
fuel
pump
Aux
Filter
Shut−off
Valve
8 ft (2.4 m)
Maximum
One Pipe Lift
One-Pipe System
To determine the correct tubing size for piping, refer to
table 3 .
Table 3
One−Pipe Oil Line Sizing
Line Length Pipe Diameter (OD Tubing)
0−50’ (15 m) 3/8" (10 mm)
51−100’ (15 m) 1/2" (12 mm)
Two−Pipe System
When using a two−pipe system with the oil tank below the
level of the burner, use a single−stage fuel pump in lift con-
ditions of up to 10 feet (3 m) and/or a vacuum of 10" (254
mm) Hg or less. See figure 15. Use a two−stage fuel pump
when lift exceeds 10 feet (3 m) and/or a vacuum of 10" (254
mm) Hg to 15" (381 mm) Hg. Both conditions require that
you use of a two−pipe system, which consists of a return
line that purges the fuel pump of air by returning it to the
tank. To determine the run and lift for piping, refer to table 4.
Use continuous lengths of heavy wall copper tubing or
steel pipe for oil supply pipe. Install oil supply pipe under
floor or near walls to protect it from damage. Avoid running
pipes along joists or reverberating surfaces. Always use
flare fittings. All fittings must be accessible. Do not use
compression fittings.
IMPORTANT
Both oil supply and return pipes must be submerged
in oil in the supply tank.
Figure 15
Oil Piping
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
fuel
pump
Aux
Filter
Return
pipe
Fill
Pipe
Air Vent
Oil
Tank
Inlet
Return
pipe
H
3"−4"
(76 mm −102 mm)
R
outside tank fuel pump above bottom of tank.
Two-Pipe System
Table 4
Two−Pipe Maximum Pipe Length (H + R)
Lift H"
3450 RPM − 3 GPH (11.4 LPH)
3/8" (10 mm) OD
Tubing
1/2" (12 mm) OD
Tubing
Single
Stage
Two
Stage
Single
Stage
Two
Stage
0’
(0.0 m)
84’
(25.6 m)
93’
(28.3 m)
100’
(30.5 m)
100’
(30.5 m)
2’
(0.6 m)
73’
(22.3 m)
85’
(25.9 m)
100’
(30.5 m)
100’
(30.5 m)
4’
(1.2 m)
63’
(19.2 m)
77’
(23.5 m)
100’
(30.5 m)
100’
(30.5 m)
6 ’
(1.8m)
52’
(15.8 m)
69’
(21.0 m)
100’
(30.5 m)
100’
(30.5 m)
8’
(2.4 m)
42’
(12.8 m)
60’
(18.3 m)
100’
(30.5 m)
100’
(30.5 m)
10’
(3.0 m)
31’
(9.4 m)
52’
(15.9 m)
100’
(30.5 m)
100’
(30.5 m)
12’
(3.7 m)
21’
(6.4 m)
44’
(13.4 m)
83’
(25.3 m)
100’
(30.5 m)
14’
(4.3 m)
−−−
36’
(11.0 m)
41’
(12.5 m)
100’
(30.5 m)
16’
(4.9 m)
−−−
27’
(8.2 m)
−−−
100’
(30.5 m)
18’
(5.5 m)
−−− −−− −−−
76’
(23.2 m)
Oil Supply Line & Filter Connections
One−Pipe Systems
CAUTION
Do not install the bypass plug into the pump on one−
pipe systems.
The burner is shipped with fuel pump set for one−pipe op-
eration. For one−pipe systems, the oil supply pipe is con-
nected to the inlet tap on the pump. A one−pipe system
should only be used where there is gravity oil flow to the
pump and the pipe is not run at any point above the oil level
in the tank.