Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 36)

© Fulton Companies 2014
OPERATION
HPN-IOM-2014-0416
SECTION 3
3-4
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
Wear eye and hand protection for
your safety.
Use extreme caution when opening
circulating pump plug if system
temperature is elevated.
Non-Fulton product information is for
reference purposes only. No Fulton
document may substitute for full
review of documentation available
from the component manufacturer.
If a fi re does occur, extinguish using CO 2
foam or dry chemical. Do not use water.
4. Do not pressurize the system with nitrogen at this point.
5. Inspect the liquid level switch (Figure 10) and be sure the switch is
functioning properly.
6. Begin fi lling the system.
7. Fill the system until the liquid level switch indicates there is oil in the
expansion tank.
8. Pressurize the system slightly with nitrogen. Leave the high point vent
connections open, as the nitrogen should be isolated from the vents by the
oil in the system. The pressure required in the system at this point is only
2-3 psi. If too much pressure is applied, the nitrogen will bubble through
the oil and vent to atmosphere. If this happens, reduce the pressure.
9. Continue fi lling the system. If liquid level switch is made, be sure to
observe the high point vents as oil is now entering the elevated portion
of the pipe work. As oil reaches the vent, close it. After all vents have
been closed, and you believe the system to be full, stop fi lling. Start the
circulating pump as described in Initial Start-Up: Cold Circulation
section of this manual. Leave the fi ll equipment connected as cleaning the
strainer may create the need for more oil in the system.
10. Determine the fi nal nitrogen pressure by measuring the diff erence
between the D.A. Tank inlet and the highest point in the system. Divide
that number by 2.31 (this will indicate the nitrogen pressure the system
should be set for).
11. If the tank is located outdoors and the inlet to the tank is the highest point
in the system, then 1-2 psig of nitrogen is suffi cient.
12. Adjustment can be made via the regulator mounted on top of the D.A.
tank.
NOTE:

If you are using a fl uid above its boiling point, the system must be
pressurized to overcome the vapor pressure of the fl uid. Consult the factory for
assistance.
 Circulating Pump
Adhere to the following:
1. Read manufacturer’s instruction manual thoroughly. If the pump is
supplied by Fulton, manufacturer’s literature is included with this manual.
2. Never run the pump without fl uid in the casing. For pumps equipped
with mechanical or air-cooled seals, air must be bled out of the stuffi ng
box area to ensure that thermal fl uid has lubricated all seal and bearing
areas. Operation of the pump even a short time without bleeding fi rst will
damage the pump.
3. Use the thermal fl uid as a barrier fl uid. Remove the 3/8” plug at the barrier
fl uid fi ll port. Fill the cavity with thermal fl uid until it comes out of the
overfl ow tube. Replace the 3/8” plug.