4. If a fuel line is run to one heater on the first
floor from the main fuel tank by means of
natural gravity and another heater on the
second floor by the use of this lifter, then the branch
point of the pipes for these two heaters should be
located close to the outlet of the main fuel tank.
Set the "head"(A) between the lifter and the heater
within the height specified for the heating appliance.
(16 in. Min., 8 ft.Max.)
(Fig. 10)
5. Refueling by series operating lifters:
(a) This lifter is capable of pumping a maximum head
of 26 ft. (8 m) at maximum, by using more than
two units a higher height can be obtain in series.
Note: In case of operating the lifters
connected in series. install them in
such a manner that the upper unit
has an approximately 3-1/3 ft. (1 m)
greater head for both vertical and
horizontal directions than the lower
unit. (Fig. 11)
*If oil meters are installed then the number of the
oil meters which are connected on the outlet side
shall be less than three units.
It should be noted that the air remaining inside
the oil meter may expand by the change of
surrounding temperature, possibly causing the
fuel to flow back to the lifter. (Fig. 12)
CAUTION: Sufficient care should also be taken
when installing more than four
oil meters, which may jeopardize
the lifter to overfill and leak oil.
(b) Be sure to install a return pipe for operating with series-connected lifters. Install
the return pipe in such a manner that there will be a clearance provided between
the outlet of the return pipe and the full oil level line in the main fuel tank. (Fig. 11)
13
Outlet side
Less than 20 in. (50
㎝
)
Less than
26 ft. (8 m)
Inlet side
main
fuel tank
Oil meter
Return pipe
Less than
26 ft. (8 m)
Less than
23 ft. (7 m)
Main fuel tank
Heater
Required
clearance
Oil level in full
Heater
Oil meter
Heater
Oil meter
Heater
INSTALLATION OF LIFTER
1. Check the accessories before installing.
Mounting rubber (3)
Wood screw (3)
Washer (3)
Fig. 10
Fig. 11
Fig. 12
Heater
A
A
