20036952
24
GB
Installation
4.11.2
Hydraulic connections
The pumps are equipped with a by-pass that separates return line
and suction line.
The pumps are installed on the burner with the by-pass closed by
screw 6), see diagram Fig. 48, page 35.
It is therefore necessary to connect both hoses to the pump.
Damage to the pump seal will occur immediately if it is run
with the return line closed and the by-pass screw inserted.
Remove the plugs from the suction and return connections of the
pump.
Insert the hose connections with the supplied seals into the con-
nections and screw them down.
Take care that the hoses are not stretched or twisted during instal-
lation.
Install the hoses where they cannot be stepped on or come into
contact with hot surfaces of the boiler and where they do not ham-
per the opening of the burner.
Now connect the other end of the hoses to the suction and return
lines.
4.11.3
Pump
Suction
1/2" NPT
2
Return
1/2" NPT
3
Pressure gauge attachment G 1/8"
4
Vacuum gauge attachment G 1/8"
5
Pressure adjustment screw
6
By-pass screw
4.11.4
Pump priming
If the pump fails to prime at the first starting of the burner and the
burner locks out, wait approx. 15 seconds, reset the burner, and
then repeat the starting operation as often as required.
After 5 or 6 starting operations allow 2 or 3 minutes for the trans-
former to cool.
Whenever the length of the suction piping exceeds 66 - 98 ft, the
supply line must be filled using a separate pump.
A
A
Fig. 20
D10089
Pump model J7C
Min. delivery rate at 290 PSI pressure
GPH
85
Delivery pressure range
PSI
145 - 304.5
Max. suction pressure
“Hg
13
Viscosity range
cSt
2.8 - 200
Max light oil temperature
°F
194 (90 °C)
Max. suction and return pressure
PSI
21.8
Pressure calibration in the factory
PSI
290
Filter mesh width
inch
0.006
Fig. 21
D2352
WARNING
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the seal located
on the pump shaft to break.
The time required for this operation depends upon
the diameter and length of the suction tubing.
WARNING
The priming operation is possible because the
pump is already full of fuel when it leaves the facto-
ry. If the pump has been drained, fill it with fuel
through the opening on the vacuum meter prior to
starting; otherwise, the pump will seize.
