ELECTRIC COMBI OVENS - GENERAL
WATER CONDITIONING
Furnishing the steam generator with treated water to reduce scale formation is important. Scale formation will reduce steam output, cause premature component failure, and shorten equipment life. Most water supplies contain scale producing minerals such as Calcium and Magnesium. As steam is generated, the minerals remain and dissolve into the water. As the concentration of these minerals increases past a certain point, they precipitate from the water and coat the inside of the steam generator, heating elements, and water level sensors. Because of the high temperature of these surfaces, the precipitated minerals bake onto them and become very difficult to remove.
This may cause several problems:
1.Reduced heat transfer efficiency.
2.Premature heating element failures.
3.False readings from water level sensors.
These problems are common to any manufacturer's steamer regardless of design, but they can all be minimized by furnishing the steam generator with treated water.
Other factors affecting steam generation are iron content, amount of chloridation and dissolved gases.
The desired water properties can best be achieved by using a properly maintained water treatment
system.
The water level probes in the steam generator use ions in the water to detect the water level. Do not use fully demineralized or
The use of strainers, or filters will not remove minerals from the water.
Water supplies vary from state to state and from locations within a state. Therefore, Vulcan recommends that a local water treatment specialist be consulted before the installation of any steam generating equipment.
Steamers that operate over a long period of time without the benefit of a water treatment system, which have developed a heavy scale build up, should be cleaned before using the system.
LUBRICATION
Cavity fan motor has sealed bearings and
requires no additional lubrication.
Cavity fan motor shaft seal requires lubrication at replacement (White silicone grease 544268).
TOOLS
Standard
Standard set of hand tools.
Metric set of hand tools.
VOM with AC current tester (any quality VOM with a sensitivity of at least 20,000 ohms can be used).
Gear puller to remove cavity fan.
Temperature meter with thermocouple.
Special
Red High Temperature RTV for door seal and probes (P/N 544313 or 542949).
Grounding kit to protect control board(s) if handled (P/N
Motor Shaft Centering Tool (P/N 359450).
28 pin EPROM extraction tool and 28 pin
EPROM insertion tool (purchase locally).
Scalekleen deliming chemical or the recommended chemical for the water treatment system in use for deliming of the steam generator. (Scalekleen is available through the Service Parts Distribution Center or locally through an Everpure dealer)
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