Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 22)

© The Fulton Companies 2014
INSTALLATION
HPN-IOM-2014-0416
SECTION 2
2-16
 Heater Connections
Adhere to the following for heater connections:
1. Connect the outlet of the pump directly to the inlet of
the heater via an isolating valve (preferably a throttling
valve) and pump fl exible connector.
2. Pipe heater outlets directly to the system via an isolating
valve.
3. A safety relief valve may be shipped in the parts box
accompanying the fuel-fi red heater, and must be installed
in the outlet manifold. On all units, the outlet must be
piped to a safe discharge area. The piping from the outlet
of the safety valve must be piped to a catch tank. The
discharge fl ow must not be restricted, i.e. no valve should
be installed. The weight of the piping must be properly
supported in order to prevent damage to the safety valve.
If the valve body becomes warped, leakage may result.
 Thermal Fluid Circulating Pump
Installing the pump in accordance with the manufacturer’s
specifi cations and these instructions will prolong the life
of the pump and contribute signifi cantly to the successful
operation of your Fulton heater system. The pump
manufacturer’s installation and operation instructions can be
obtained from the manufacturer.
Adhere to the following for pump installation:
1. Locate pump adjacent to the heater. Its base must be
fi rm, level (preferably concrete), and free from vibration.
2. Route pump per the manufacturer’s requirements. It
should be equipped with fl exible connections at the
suction and discharge sides. The primary function of
these connections are to prevent stresses due to pipe
expansion from being placed on the pump and to
isolate pump vibrations from the pipe work and the
heater. They also allow for expansion and defl ection of
the pipe work. These connections should be rated for
high temperature since they are considered part of the
piping system.
3. Connect suction pipe work directly to the deaerator
section via a vertical run with as few elbows as possible.
It should contain the strainer and an isolating valve.
The discharge pipe work must be connected directly to
the heater inlet, and should contain an isolating valve.
See that pipe work connections match up accurately
with pump fl anges. Refer to the pump manufacturer’s
recommendations for the specifi c pump inlet piping
requirements. Typically these requirements are that:
 It be a straight run of pipe.
 The straight run from the pump inlet to the fi rst
fi tting, valve, or fl ex connector be a minimum of 6-10
pipe diameters in length.
 The pipe used should be the same size as the inlet of
the pump.
 The piping in the immediate vicinity of the pump
must not be supported by the pump. The pump is
not designed to bear the weight of the piping, and
weight on any part of the pump will throw it out of
alignment.
 Proper alignment directly aff ects bearing, coupling,
and seal life expectancy. The pump is properly aligned
before it leaves the factory. Because the system
expands in operation, pump must be realigned when
the system is at operating temperature.
 The coupling alignment of the pump and driver must
be carefully checked for angular and axial alignment.
Check pump manufacturers instructions for these
specifi cations. The use of a dial indicator to check the
axial and angular alignment is recommended.
 An air cooled pump does not have an oiler. This type
of pump has a sleeve bearing which is, like the seals,
lubricated by thermal fl uid. An air cooled pump
has a grease nipple located at the drive end of the
pump near the coupling connection. This comes
pre-greased, and should be greased at intervals as
recommended by the manufacturer.
 An oiler is shipped with each water cooled pump and
it should be fi lled with a lubricating oil recommended
by the manufacturer. The suggested lubricant is
usually SAE-30 non-detergent oil.
 Thermal fl uid is not suffi cient lubrication for bearings.
 All seals on air cooled pumps are lubricated by
thermal fl uid, therefore the pump must never be run
dry, i.e., without thermal fl uid in it.
 Filling a pump equipped with either a Grafoil packed
or mechanical seal with thermal fl uid will ensure
lubrication. However, in order to be certain that all
seals on an air cooled pump are coated with thermal
fl uid, the pump must be bled.
 Grafoil packings require a run-in procedure. Typically,
pumps with these seals are shipped with four or