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INSTALLATION AND OPERATION MANUAL, DIRECT STEAM FULL JACKET TILTING KETTLES,
6.0 TROUBLESHOOTING
DRAW-OFF VALVE LEAKS
If a leak occurs through the valve steam, replace the "O" ring. If the leak can be attributed to
faulty sealing occurring between the stem disc and valve seat, then quite often this problem can
be corrected by cleaning off the dried on food residue with an extremely fine emery cloth or the
rubber vulcanized stem piece has been damaged and must be replaced.
NOTICE: Draw-off valve has a vulcanized rubber coated stem for better
sealing. Do not over tighten. This may cause the rubber to pull away from
stem and permanently damage it.
EXTREMELY SLOW COOKING TIME
If the cooking time is abnormally slow then the difficulty may be due to insufficient steam
pressure and/or volume. First determine that pressure on incoming steam line at the kettle is
within 5 p.s.i. of rated kettle pressure. Note that pressures approaching the rated kettle
pressure are liable to set off the safety relief valve. If required pressure is available to the
kettle, then possibly volume of steam is not sufficient. Minimum 3/4" pipe size is required to the
kettle but if the steam generating source is at a great distance from the kettle, larger pipe will be
required. Finally, the core of the steam supply pipe may have debris or scalants that impede
steam flow and will require disassembly and inspection.
AIR VENTING
It is recommended that the "optional" steam trap assembly be installed. This should be
plumbed to the exit end of the kettle. The thermostatic trap is a mechanical device that closes
on high temperature and opens when the temperature drops, allowing the water which formed
from condensate to exhaust but retain the steam under pressure.
The temperatures required for the cooking process to function adequately must be greater than
the boiling point of the liquid food product, that is, water. The greater the steam pressure used,
the higher the temperature and the quicker the cooking process. For example, steam
pressurized at 30 psi reaches a temperature of 274 degrees Fahrenheit (135 degrees Celsius).
Since air is an unsuitable media through which heat may be transferred, the air should be
exhausted from the jacket by opening the pressure relief valve until the air has been completely
replaced by pressurized steam.
PART NUMBER 10216R1
MODELS: DLT-20F, DLT-30F, DLT-40F, DLT-60F
10
2013-07-16
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