4
PENBERTHY
MODEL CTE MIXER / HEATER
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
5 OPERATION
5.1 Pre-operational check
1. Ensure that all installation procedures have
been completed.
2. Fill the tank with sufficient liquid for full
submergence of the CTE.
5.2 Operating
1. For mixing
a. Turn operating fluid flow on (depending
upon the application, this may be liquid
drawn from the tank, or it can be a second
liquid drawn from another source).
2. For heating
a. Turn the steam flow fully on and maintain
throughout the heating process.
b. After the desired temperature is reached,
the steam pressure should be turned off.
3. Do not throttle the steam supply valve.
Throttling of steam flow to conditions
outside the recommended operating levels
will cause the CTE to hammer with resulting
noise and vibration.
IMPORTANT
Excessive vibration can become hazardous due to
loosening of pipe joints and release of steam.
Example:
A CTE is employed in raising the
water temperature in a given tank from
ambient to 160°F (71°C) and it is sized to
accomplish the job using 50 psig (340 kPaG)
steam over a period of 30 minutes. Once
the tank temperature reaches 160°F (71°C),
obviously it will take much less quantity of
steam to maintain the tank at 160°F (71°C)
than it did to get there. If the steam flow was
throttled to maintain 160°F (71°C) in the tank,
the steam pressure would drop necessarily
below 50 psig (340 kPaG) at the CTE and then
noise and vibration can be expected. 50 psig
(340 kPaG) is the recommended minimum
steam pressure for quiet operation when the
tank temperature is 160°F (71°C).
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
CTE 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
a sudden release of liquid or steam resulting in
severe personal injury or property damage.
6.1 Preventative maintenance
The user must create maintenance schedules,
safety manuals and inspection details for each
specific installation of a CTE mixer/heater.
On all installations, the following items should
be evaluated regularly by the user for purposes
of maintenance:
1. CTE(s) for corrosion or debris build up.
2. Piping and fittings for corrosion or debris
build up.
3. All connections for tightness.
4. Units for wear.
5. Units for full submergence.
TABLE 3 - TROUBLESHOOTING
Problem
Cause
Solution
No mixing or heating taking
place
1. Inadequately sized CTE
1. Obtain properly sized CTE
2. Debris blockage of inlet, suction or discharge
2. Remove debris
3. Loss of operating fluid due to loose connections
3. Tighten connections
4. Operating fluid pressure too low
4. Increase pressure
Partial mixing or heating
1. Debris blockage
1. Remove debris
2. Operating fluid pressure too low
2. Increase pressure
3. Increased product demand
3. Reduce product flow to heating capability of unit
Noise, water hammer,
vibration when heating
1. Operating pressure too low or liquid temperature too high 1. Increase pressure or decrease temperature
2. Throttling of steam flow
2. Thermostatically controlled heating cycles with snap acting on-off valve
3. Set point is too high (such as 200°F [93°C])
3. Decrease to recommended operating level
Temperature of liquid can be controlled
thermostatically only if the steam supply is
controlled with a snap acting on-off valve.
WARNING
Do not attempt to heat liquid beyond the
maximum stated temperature of 160°F (71°C).
Where the user has an open tank installation,
heating beyond the maximum does not allow the
steam time enough to condense fully by the time
it reaches the surface of the liquid, thus splashing
can result causing severe personal injury or
property damage.
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 Troubleshooting (see Table 3)
