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PENBERTHY MODEL FHS AUTOMATIC LIQUID HEATING SYSTEM
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
5.2 Operating
1. Turn operating liquid valve fully on and
establish full flow. Keep it on throughout the
entire operation process.
WARNING
Failure to maintain the liquid flow while operating
the FHS with steam can cause live steam to be
driven into the liquid piping, resulting in severe
personal injury or property damage.
2. Turn on the air pressure regulator and
adjust the air pressure knob to 18 psig
(125 kPaG).
3. Set the knob of the temperature controller
at 120°F (49°C) and check for proper
operation of the steam valve, which should
be fully open in about 20 seconds time.
If the steam valve does not open in about
20 seconds, adjustment of the temperature
controller is necessary. Follow all steps
and precautions printed in the installation
instruction manual prepared for the specific
controller by its manufacturer.
4. Bleed out trapped air inside the pipe
cross where the thermometer is installed
by slightly loosening the thermometer
connection until liquid begins to drip out,
then retighten the thermometer in place.
5. Slowly and partially open the manually
operated steam line valve to first check for
leaks. If leaks are evident, close the valve,
allow the line to cool off, tighten connections
and repeat the procedure until all leaks are
stopped.
6. Turn the temperature controller knob to
100°F (38°C) to allow steam to flow while
checking for leaks. If leaks are evident,
shut off the steam supply, allow the line to
cool off, tighten connections and repeat the
procedure until all leaks are stopped.
7. Fully open the operated steam valve
manually.
8. Turn the temperature controller knob
gradually to the desired outlet liquid
temperature and allow the FHS to
stabilize. Compare the knob setting with
the thermometer reading and adjust if
necessary.
TABLE 2 - TROUBLESHOOTING
Problem
Surges in liquid flow.
Surges in outlet temperature.
There are two distinct operating noise levels
typical of the FHS, within specific operating
conditions. For detailed information on these
operating conditions, request Emerson to
supply the relevant technical data sheet.
5.3 Shutdown
1. Turn the manually operated steam line valve
off in order to first lower the steam line
pressure as much as possible before shut
down.
2. Set the temperature controller knob to
the lowest possible reading by turning it
counterclockwise as far as it will go. This
will cause the steam flow control valve to
close fully.
3. Turn the air pressure regulator valve off
fully.
4. Gradually turn the operating liquid flow off
fully.
WARNING
Failure to maintain the liquid flow throughout
the shutdown procedure may cause live steam
to drive into the liquid piping, resulting in severe
personal injury or property damage.
6 MAINTENANCE
WARNING
Maintenance should only be undertaken by
qualified, experienced personnel who are
familiar with this equipment and have read and
understood thoroughly all the instructions in this
manual.
DO NOT proceed with any maintenance unless the
FHS has been relieved of all pressure or vacuum,
has been allowed to reach ambient temperature
and has been drained or purged of all fluids.
Failure to follow these instructions may cause
severe personal injury or property damage.
Cause
Pumping action.
Temperature controller overshoot.
6.1 Preventative maintenance
The user must create maintenance schedules,
safety manuals and inspection details for each
specific installation of an automatic liquid
heating system.
On all installations, the following items should
be evaluated regularly by the user for purposes
of maintenance:
1. FHS components for corrosion and to
remove debris build up.
2. Piping and fittings for corrosion and to
remove debris build up.
3. All connections to maintain tightness and
eliminate leaks.
4. Air pressure regulator to maintain 18 psig
(125 kPaG).
5. Outlet liquid temperature to maintain
desired setting.
6. Steam line strainer to remove debris
build up.
7. Temperature controller response and
sensitivity.
The user must determine an appropriate
maintenance schedule necessary for his or her
own specific application upon evaluation of their
operating experience. Realistic maintenance
schedules can only be determined with full
knowledge of the services and application
situation involved.
6.2 Maintenance procedures
1. For servicing the actuator, the user must
follow all steps and precautions printed in
the installation instruction manual prepared
for the specific actuator by its manufacturer.
2. For servicing the steam flow control
valve, the user must follow all steps and
precautions in Section 7.
3. For servicing the steam ring heater, the
user must follow all steps and precautions
printed in the installation manual prepared
for the specific steam ring heater.
4. For servicing the temperature controller,
the user must follow all steps and
precautions printed in the installation
manual prepared for the specific controller
by its manufacturer.
6.3 Troubleshooting (see Table 2)
Solution
Increase pressure discharge.
Desensitize controller. Refer to temperature
controller installation manual.
4
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