Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 31)

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SECTION 2
HPN-IOM-2014-0416
INSTALLATION
2-25
!
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.
Cements for plastic pipe should
be kept away from all sources of
ignition. Proper ventilation should
be maintained to reduce the hazard
and to minimize breathing of cement
vapors.
No shutoff of any kind may be
placed between the safety relief
valve and the equipment, or in the
discharge pipe between such valve
and the atmosphere. Doing so may
cause accidental explosion from
overpressure.
Discharge from safety relief valve
must be confi gured so that there
is no danger of scalding personnel
or causing equipment damage.
Provisions must be made to properly
drain safety relief valve discharge
piping.
Failure to ensure vent connections
terminate into a well-ventilated
area with catch tank may create an
environmental hazard.
High temperature thermal fl uid,
steam, and combustible vapors
may be vented through the vent
connection on the combination
deaerator/thermal buff er/expansion
tank.
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.
4. 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.
5. 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.
6. Ensure the stack and chimney material complies with all applicable codes.
7. 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.
8. 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.
9. The installation of a draft regulator by the client/contractor is
recommended at all installations. This will help to maintain the required
draft.
10. Insulate the section of the chimney duct within the building.
11. 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.
Testing
Upon completion of the installation, perform the following testing:
1. A pneumatic test of thermal fl uid piping not exceeding 15 psig.
2. Soap tests at all welds and joints to ensure that the system is free from
leaks.
NOTE:  Under no circumstances should the system be fi lled with water. Make sure
that the air supply is as free from moisture as possible.
3. Boil-out. The time needed for adequate boilout directly corresponds
to the volume of the system and the amount of moisture and debris in
the system. Boilout typically takes anywhere from one to three days to
complete. Pressure testing on the system should be done by means of an
inert gas such as nitrogen or by an air compressor producing dry air (air
with a dewpoint of 50°F [10 C] or less). Never perform a hydrostatic test on