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
Page 33
3
3.3
FILLING THE SYSTEM
The kinematic viscosity of thermal fluid is generally very high (5 x 10
-4
m
2
/s) at ambient temperature.
Below 10°C some fluids become very thick. Fluid should be in a pumpable liquid form prior to filling
the system.
a) Filling must be carried out from the lowest point in the system in order to prevent air pockets
from forming.
b) A drain and fill point (generally a DN20 threaded coupling) is provided on the inlet to the pump
suction on skid-mounted units.
c) Typically a portable, high velocity pump, such as the type used for chemical transfer, is
appropriate for filling the system. Where only one or two drums of fluid are required, a handheld
pump may be practical.
Note:
Some plastics can be dissolved by thermal fluid.
Note:
Do not use system circulating pump for system filling.
Note:
A pump that has been used for water or a different thermal fluid should not be used prior to extensive
cleaning. Thermal fluid can be damaged by contact with moisture or other fluids.
1. Fill the system slowly, closing all opened bleed and drain valves as fluid reaches them.
2. When the fluid reaches and flows from the expansion tank low level manual test connection,
begin slowing down the filling process.
3. Close the low level connection and continue to fill until the liquid level switch closes. After fluid
appears in the low level connection, only a small amount of additional fluid should be required.
4. If fluid is observed coming from the expansion section high level manual test connection, drain
fluid from the tank until the level is between the liquid level switch and the high level connection.
5. Filling is complete when the fluid has reached the lowest level in the expansion tank required
to actuate the liquid level switch. Check to see that the liquid level switch operates freely. To
confirm operation of the liquid level switch, manually trip the liquid level switch. Unit should shut
down; pump will stop.
Check to see that the liquid level switch operates freely. To confirm operation of the liquid level
switch, manually trip the liquid level switch. Unit should shut down; pump will stop.
6) Fill the system slowly, closing all opened bleed and drain valves as fluid reaches them.
7) When the fluid reaches and flows from the expansion tank low level manual test connection,
begin slowing down the filling process.
8) Close the low level connection and continue to fill until the liquid level switch closes. After fluid
appears in the low level connection, only a small amount of additional fluid should be required.
9) If fluid is observed coming from the expansion section high level manual test connection, drain
fluid from the tank until the level is between the liquid level switch and the high level
connection.
10) Filling is complete when the fluid has reached the lowest level in the expansion tank required to
actuate the liquid level switch.
3.3.1
FILLING PROCEDURE