Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 57)

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SECTION 3
HPN-IOM-2014-0416
OPERATION
3-25
!
WARNING
Do not operate, or allow others
to operate, service or repair this
equipment unless you (they) fully
understand all applicable sections
of this manual and are qualifi ed to
operate/maintain the equipment.
period, indicator lights on the fl ame safeguard (pilot and main).
5. With no fl ame established, the fl ame safeguard will not receive a fl ame
signal from the scanner.
6. After 4 seconds, the fl ame safeguard programmer will assume a “Flame
Failure” condition and go to a “lockout” mode. Lockout will require manual
reset of the fl ame safeguard.
7. After completing this test, open the gas valve.
 Cycle Testing
The heater should be cycled tested and automatically allowed to go through
its normal starting sequence several times to verify that all components are
functioning properly. This will also verify that combustion is set properly so that
heater light off has a smooth transition from ignition to main fl ame.
A minimum of 10 cycles should be met without any fl ame failures, with
combustion readings comparable to the factory test fi re sheet and no interlocks
causing the heater to shutdown.
Required Pressure Drop Across the Heater
The thermal fl uid pressure drop across your heater is critical. This should be
recorded at the completion of start-up, as follows:
1. The pressure drop value is obtained by subtracting the heater outlet
pressure from the heater inlet pressure when the thermal fl uid is at normal
operating temperature.
2. At the recommended standard fl ow rates, and .7 sp gr, the pressure drop
cross the heater should be as shown in Table 8. Please contact Fulton for
your specifi c order to verify your fl ow rate.
3. In the event of an abnormal reading, contact Fulton Service immediately.
Failure to take immediate action in the event of reduced fl uid fl ow may
result in rapid and serious degradation of the fl uid, with possible damage
to the heater.
TABLE 8 - REQUIRED PRESSURE DROP ACROSS THE HEATER
Model Recommended GPM (schedule 40) Pressure Drop PSI
100S 75 10
200S 150 23
350S 265 11
600S 425 16
800S 600 16
1000S 725 13
1200S 900 16
1400S 1050 10
1600S 1200 15