FT-C Vertical Electric Thermal Fluid Heater Manual 12 2013 ISSUE 1
The kinematic viscosity of thermal uid is generally very high (5 x 10
-4
m
2
/s) at ambient temperature.
Below 10°C some uids become very thick. Fluid should be in a pumpable liquid form prior to lling
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 ll 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 lling the system. Where only one or two drums of uid are required, a handheld
pump may be practical.
Some plastics can be dissolved by thermal uid.
Do not use system circulating pump for system lling.
A pump that has been used for water or a different thermal uid should not be used prior to extensive
cleaning. Thermal uid can be damaged by contact with moisture or other uids.
1. Fill the system slowly, closing all opened bleed and drain valves as uid reaches them.
2. When the uid reaches and ows from the expansion tank low level manual test connection,
begin slowing down the lling process.
3. Close the low level connection and continue to ll until the liquid level switch closes. After uid
appears in the low level connection, only a small amount of additional uid should be required.
4. If uid is observed coming from the expansion section high level manual test connection, drain
uid from the tank until the level is between the liquid level switch and the high level connection.
5. Filling is complete when the uid 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
conrm 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 conrm 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 uid reaches them.
7) When the uid reaches and ows from the expansion tank low level manual test connection,
begin slowing down the lling process.
8) Close the low level connection and continue to ll until the liquid level switch closes. After uid
appears in the low level connection, only a small amount of additional uid should be required.
9) If uid is observed coming from the expansion section high level manual test connection, drain
uid from the tank until the level is between the liquid level switch and the high level
connection.
10) Filling is complete when the uid has reached the lowest level in the expansion tank required to
actuate the liquid level switch.
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