Fulton Vertical Tubeless (FT-A) Thermal Fluid (hot oil) Heater - Manual (Page 37)

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SECTION 2
FTA-IOM-2013-0227
INSTALLATION
2-31
!
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.
For reasons of safety, the hot exhaust
gas duct and chimney must be
insulated or shielded within the
locality of the heater in compliance
with local codes and regulations.
4
CAUTION
The stack arrangement and draft
conditions should be in accordance
with the information in this manual for
proper performance of the equipment.
Stack and Flue
An appropriately sized stack should be connected to the fl ue gas outlet at the
heater. The proper fl ue size and draft control is most important for proper burner
operation. The fl ue must be as large or larger than the outlet on the vessel.
Avoid fl ue piping and elbows by placing the equipment as close as possible to
the chimney.
Adhere to the following for stack and fl ue installation (see Figure 17):
1. Ensure the stack rises continuously to the connection at the chimney and
contains no more than two bends at 45 degree angles or less. If required,
as a result of space limitations, one 90 degree elbow (or tee) can be fi tted
at the back of the vessel.
2. Ensure 2 feet (0.6 m) of straight, horizontal fl ue before any change in
direction, fi tting or draft regulator. This is to prevent potential pilot or
main fl ame failures due to back pressure build up during ignition. Any
alternative stack arrangement must supply negative 0.02 to 0.04”wc.
3. Ensure the run in the total distance of stack ducting, as measured in a
straight line from the outlet of the heater to the outlet of the stack, does
not exceed 70% of the rise. With the exception of the duct run previously
described, horizontal sections of ducting must be avoided and should not
exceed 4 feet (1.2 m) total. See Figure 17.
4. Ensure the stack, chimney, and any components associated with the stack,
such as heat reclaimers or assist fans, are constructed from material that is
rated for a 1200 F (649 C) operating temperature.
5. Ensure the stack and chimney material complies with all applicable codes.
6. Make adequate provisions for the support of the weight of the chimney
and stack to avoid having a load imparted to the outlet connection of the
equipment.
7. Ensure the draft, when fi ring, is negative and constant. A reading of -0.02 to
-0.04”wc when the unit and stack are cold usually indicates suffi cient draft.
When the unit is running and the stack is hot, the draft should read 0.04 to
0.08 “wc negative.
8. The installation of a draft regulator by the client/contractor is
recommended at all installations. This will help to maintain the required
draft. The placement of the draft regulator should be as shown in Figure 18.
9. Insulate the section of the chimney duct within the building.
10. Concentration levels of only a few ppm of chlorine containing compounds
in combustion air can produce serious corrosion of the fl ue over long
periods of time. High chlorine containing compounds such as carbon
tetrachloride or perchloroethylene would be prime suspects.