Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 13)

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SECTION 2
HPN-IOM-2014-0416
INSTALLATION
2-7
or another unit.The burner assembly and gas controls
terminate at a manual stop valve to which the gas
supply should be connected. Piping must be sized
for a gas fl ow consistent with the required BTU/Hr
input. Large pressure drops must be avoided. Fulton
recommends that the supply piping between the
pressure regulator and the inlet to the heater be kept to
a minimum. The minimum required gas pressure at the
stop valve varies with the model of heater.
NOTE:  Even when the unit is shut down, the gas supply
pressure must never exceed these values.
11. Some fuel train confi gurations are require a safety relief
valve which must be piped to a safe area in accordance
with local codes.
12. After gas piping is completed and before wiring
installation is started, carefully check all piping
connections, (factory and fi eld), for gas leaks. Use a soap
and water solution.
 The Oil Supply
Fuel Oil Viscosity Specifi c Gravity Sulfur Content
#2 Less than
31.9 Seconds
Redwood #1 at
100°F (38°C)
0.824 to 0.852 at
59 C (15°C)
less than 0.40%
by weight
#4 Less than
81 Seconds
Redwood #1 at
100°F (38°C)
0.90 to 0.93 at 59
C (15°C)
less than 0.1.6%
by weight
#6 Less than 3000
Seconds Red-
wood #1 at 100°F
(38°C) 0.95 to 0.98 at
59°F (15°C) less than 2.12%
by weight
Adhere to the following for installation:
1. Fuel pipes must be of approved materials and of a
diameter suitable for the quantity of oil being delivered to
the burner and the static head available.
2. Make fuel connection in accordance with the details on
the enclosed fuel pump cut sheet.
3. Ensure fuel oil piping is in accordance with local and/or
national requirements. In addition, if a two pipe system
is employed, a check valve must be fi tted into the return
pipe.
4. Do not exceed the 3 psi maximum pressure allowed at
the fuel oil pump inlet per the National Fire Protection
Association (NFPA).
NOTE:  If for some reason the pressure of the fuel supply will
exceed NFPA maximum, fi tting a regulator to the fuel line
must be considered, e.g. when there is a tank situated with an
oil level eight feet (2.4 m) or more above the pump.
5. On units fi tted with NFPA controls, ignition is obtained by
means of a gas pilot. A natural gas or LP supply is required
for these units. The required gas supply pressure is 7” w.c.
If a guaranteed supply of natural gas is not available, then
a supply of bottled gas at 11“w.c. is required. For details
contact a local liquid propane dealer.
Instrument Air
Instrument air provision for pneumatically actuated control
devices should meet the minimum and maximum fl ow rate
and delivery pressures specifi ed by the individual equipment.
Additionally, it should be a dry, dust-free,water-free, and oil-
free supply with a dew point of -40°F (-40°C).
Electrical Supply
Adhere to the following for electrical supply installation:
1. Install wiring and ground in equipment in accordance
with authority having jurisdiction or in absence of such
requirements the National Electrical Code, ANSI/NFPA 70.
2. Provide a wall-mounted, fused disconnect sized for
the unit. This must be fi tted by the client/contractor if
disconnect is not supplied on the panel.
3. Size fuses according to motor name plates and local
electrical codes.
4. Connect power to the terminal strip as supplied on the
inside of the panel box.
NOTE:  Single skid systems are generally shipped completely
prewired.
NOTE:

The liquid level switch on the expansion tank, when
supplied, will be shipped in the parts box and must be
installed in the fi eld.
5. Determine multiple skid systems wiring requirements
(between the skids). Fulton will run conduit and wire
the devices on each skid. For the devices that have to