FULTON FT-0080C, Installation, Operation, Maintenance And Parts Manual

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FT-C Vertical Electric Thermal Fluid Heater Manual 12 2013 ISSUE 1
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2.9.4
SIzING THE TANK FOR THE SYSTEM
Combination tank capacity is the total volume of the tank. It is necessary to have some air space
available at the top of the tank to avoid spillage or overflow. At initial fill (for system volume
calculations) the deaerator and thermal buffer sections must be filled completely and the
expansion section must be filled to a level of 100 mm to "make" the liquid level switch.
The volume between the initial fill level and the safe "full" level is the amount available for
expansion. That volume is used to decide which tank is suitable for the system expansion.
Sizing Example
A system contains 660 litres, including the heater, but not the tank. You select the FT-200-L, so you
add 95 litres to 660. You must look up the expansion rate for the thermal fluid. (Assume it is 25%).
755 litres x 1.25 = 945 litres. 945-755 = 190 litres expansion. The FT-200-L has only 75 litres
available for expansion, so the correct selection is the FT-500-L.
2.9.5
LOCATION
a) The combination tank must be installed in accordance with Fulton Ltd's specifications.
b) Unless the system is pressurised, the inlet to the deaerator section must be higher than or equal
to the highest point in the system to prevent pockets of air from collecting in system piping.
c) The head required at the circulation pump suction inlet must also be taken into account to avoid
the possibility of pump cavitation. In systems operating close to maximum fluid temperature, the
tank must be elevated enough, possibly well above the highest point in the system to prevent
pump cavitation by increasing the static head. An inert pressurising blanket may be considered
as an alternative. See
Pressurised Systems, sections 2.9.6
d) Supports for tank mounting should be provided by the client/contractor. These should be suited
for supporting the tank by the side rails. The eyelets fitted to the tank are for lifting only.