Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 47)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 47
liquid level switch, manually trip the liquid level switch. Unit should shut
down; pump will stop.
4. For Systems Equipped with Inert Blankets
a) Follow the instructions listed under “Filling The System”.
b) Pay close attention to notes and warnings.
c) Inspect the system to be sure all valves are open and all drains are closed.
d) Open all high point air vents.
e) Do not pressurize the system with nitrogen at this point.
f) Inspect the liquid level switch and be sure the switch is functioning properly.
g) Begin filling the system.
h) Fill the system until the liquid level switch indicates there is oil in the expansion tank.
i) Pressurize the system slightly with nitrogen. Leave the high point vent connections open,
as the nitrogen should be isolated from the vents by the oil in the system. The pressure
required in the system at this point is only 2-3 psi. If too much pressure is applied, the
nitrogen will bubble through the oil and vent to atmosphere. If this happens, reduce the
pressure.
j) Continue filling the system. If liquid level switch is made, be sure to observe the high
point vents as oil is now entering the elevated portion of the pipe work. As oil reaches the
vent, close it. After all vents have been closed, and you believe the system to be full, stop
filling. Start the circulating pump as described under “Cold Circulation.” Leave the fill
equipment connected as cleaning the strainer may create the need for more oil in the
system.
k) The final nitrogen pressure is determined by measuring the difference between the D.A.
Tank inlet and the highest point in the system. Divide that number by 2.31 (this will
indicate the nitrogen pressure the system should be set for). Adjustment can be made via
the regulator mounted on top of the D.A. tank.
Note
Tanks are non-code as a standard. Non-code tanks cannot be pressurized over
15psig. Tanks built to ASME code Section VIII Div 1 are available upon request.
5. Circulating Pump
a) Read manufacturer’s instruction manual thoroughly. If the pump is supplied by Fulton
Thermal Corporation, manufacturer’s literature is included in this manual.
Note
Do not run the pump before filling it with fluid.