FULTON FT-0080C, Installation, Operation, Maintenance And Parts Manual

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FT-C Vertical Electric Thermal Fluid Heater Manual 12 2013 ISSUE 1
Page 64
4
4.4.5
LOW INLET PRESSURE SWITCH
Slowly close the valve on the outlet of main circulating pump, observing the heater inlet
pressure gauge. Note the pressure at which the switch trips. This pressure should be roughly the
set point of the switch minus any differential that is set.
4.4.6
HIGH OUTLET PRESSURE SWITCH
Note the original setting of the switch and turn the adjustment screw anti-clockwise while
observing the heater outlet pressure gauge until the switch trips. The pointer on the switch should
be within 0.15 barg of the observed pressure. Reset the switch to the original set point.
FIG. 29 INLET AND OUTLET PRESSURE GAUGES FIG. 30 HIGH OUTLET PRESSURE SWITCH
High outlet
pressure
switch
Outlet
Inlet
4.4.7
HIGH/LOW GAS PRESSURE SWITCH
Shut off the main gas valve prior to the gas train and attempt to light the unit. After the gas valves
open during the ignition trial, the low gas pressure switch will trip. Reset the low gas pressure switch
and flame programmer. Open main gas valve prior to gas train and close gas valve between last
actuated gas valve and burner. Attempt to light the unit. After the gas valves open, the high gas
pressure switch will trip. Reset the high gas pressure switch and the flame programmer.