Fulton Vertical Tubeless (FT-A) Thermal Fluid (hot oil) Heater - Manual (Page 29)

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SECTION 2
FTA-IOM-2013-0227
INSTALLATION
2-23
Adhere to the following for installation:
1. Install tank in accordance with Fulton Thermal
Corporation’s specifi cations.
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. Take into account the head required at the circulation
pump suction inlet to avoid the possibility of pump
cavitation.
4. In systems operating close to maximum fl uid
temperature, ensure the tank is 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 section of this
manual.
5. Provide supports for tank mounting. These should be
suited for supporting the tank by the side rails. The
eyelets fi tted to the tank are for lifting only.
Pressurized Systems
Nitrogen pressurization may be used if the total system
content is very large, or in a system operating near or above
the vapor pressure of the fl uid employed, or if the inlet of the
DA tank is not the highest point in the piping system, or at
any time to further protect the fl uid from oxidation.
In conjunction with this system, adhere to the following:
FIGURE 11 - TYPICAL WATER COOLED PUMP
operation. This section of the tank must be insulated.
A system of interconnecting pipe work in the thermal buff er
tank section prevents the movement of any oil that has not
cooled suffi
ciently into the expansion section. This avoids
contact of very high thermal fl uid temperature with oxygen
contained in the atmosphere, which causes fl uid breakdown.
DO NOT insulate this section.
Sizing The Expansion Tank For The System
Expansion 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 overfl ow. At initial fi ll (for system
volume calculations) the deaerator and cold seal sections
must be fi lled completely and the expansion section must be
fi lled to a level of 4 inches (102 mm) to “make” the liquid level
switch.
The volume between the initial fi ll 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 175 gallons, including the heater, but not
the tank. You select the FT-200-L, so you add 25 gallons to 175
for a total of 200 gallons.
You look up the expansion rate for the thermal fl uid.
(Assuming 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.