Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 24)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 24
overflow. At initial fill (for system volume calculations) the deaerator and
cold seal sections must be filled completely and the expansion section
must be filled to a level of 4 inches to "make" the liquid level switch.
2. 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.
f) Sizing Example
1. A system contains 175 gallons, including the heater, but not the tank.
You select the FT-200-L, so you add 25 gallons to 175. You must look up
the expansion rate for the thermal fluid. (Assume it is 25%). 200 gal. x
1.25 = 250 gallons. 250-200 = 50 gallon expansion. The FT-200-L has
only 46 gallons available for expansion, so the correct selection is the
FT-500-L.
g) Location
1. The tank must be installed in accordance with Fulton Thermal
Corporation's specifications.
2. Unless the system is pressurized, 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.
3. 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 pressurizing
blanket may be considered as an alternative. See Pressurized
Systems.
4. 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.