Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater - Manual (Page 54)

Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 54
h) If no liquid level switch is provided on the expansion tank, open the low level manual test
connection regularly while brining the unit up to temperature. If a permanent flow of fluid
does not result when this valve is opened, stop the heater and the pump and add more
thermal fluid to the system. Use only the exact same brand and type of fluid initially used
to fill the system.
i) Once up to temperature, check the fluid level in the expansion section by opening the
high level manual test connection. If a permanent flow of fluid results when this valve is
opened, and if all previous precautions have been followed, the expansion tank is too
small for the capacity of the fluid in the installation. A larger tank must be installed.
j) After fifty hours of operation at operating temperature, check all flanges and connections
for tightness.
11. Procedure for First Shutdown
a) The heater system should be shut down after no more than 24 hours of operation at full
operating temperature. At this time, the following maintenance items will need to be
completed to meet warranty conditions.
b) While pump is still at operating temperature, align circulating pump(s) to pump
manufacturer’s specifications. This should be done by means of a dial indicator.
c) Isolate Y-strainer(s) in system and clean regardless of pump suction pressure. Make sure
that the temperature is low enough to handle safely or provision has been made to
handle materials at high temperature. Generally, temperatures below 150°F are
acceptable to perform operation with regular work gloves.
d) With piping system cooled to ambient temperature, torque all bolts on skid and
throughout system to gasket manufacturer’s specifications using proper flange torquing
practices such as incremental torque increases, star pattern, etc. Refer to Installation
Section.
e) Visually inspect all thread fittings and valve packings. Repair leaks and tighten valve
packings to the point of stopping leak.
f) Upon putting unit back into operation, check all gauge readings and compare to values
given to you by the start-up technician. Note any discrepancies and contact Fulton.
12. Required Pressure Drop Across the Heater
a) The thermal fluid pressure drop across your heater is critical. This should be recorded at
the completion of start-up. The pressure drop value is obtained by subtracting the heater
outlet pressure from the heater inlet pressure when the thermal fluid is at normal
operating temperature.
b) At the recommended standard flow rates, and .7 sp gr, the pressure drop across the
heater should be as shown in the chart on the following page.