Vogt TUBE-ICE P-118F, Руководство по обслуживанию

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P118F Service Manual
MAINTENANCE
1/6/09
7-2
Water Distributors. The water distributors are located under the freezer cover (8) at the top of the
freezer. There are 78 distributors used in the models that have a 1 1/2” suffix (i.e. , Models
P18FXT-1 1/2), 102 distributors in models with suffix 1 1/4” (i.e., Models P18FXT-1 1/4”), and
156 distributors are used in the models have 1” suffix (i.e., Model P18FXT-1”). These
distributors may require occasional or periodic cleaning to remove solids and foreign particles
accumulated from the make-up water. The frequency of this cleaning operation will depend on
the characteristics of the water supply. The cleaning operation is needed when the inside
diameter of a large proportion of the ice becomes irregular (due to channeling of water), or if
some of the ice is opaque, or if there is a noticeable decrease in ice capacity.
To clean distributors, stop the unit and remove the freezer cover (8) on top of the freezer. The water
distributors (one in each tube) may then be removed with pliers for cleaning. Use pliers on the
distributor’s top part with a twisting upward motion.
Water Tank. The production of opaque ice can indicate that the water in the water tank contains a
concentrated amount of solids or salts.
Remove cover plate. Open drain valve (39). Clean tank thoroughly by flushing out with a hose and
scrubbing with a stiff brush. Fill the water tank with fresh water.
When restarting the machine, be sure that the water pump is circulating water. It is possible that air
may have collected in the pump impeller housing and the pump may have to be stopped and started
several times to expel the air.
Water Cooled Condensers
Checking Operation.
How often condensers need cleaning depends on so many variables that it is
impossible to recommend a schedule. Some will seldom need cleaning, others perhaps need
cleaning once a year. In rare cases, cleaning is required several times a year.
Proper operation of cooling towers will increase the interval between cleaning considerably. The
tower overflow rate should be checked frequently. If a tower is operated with insufficient overflow,
nominal 1-1/2 to 3 GPH bleed depending on water quality, the resulting mineral concentration in the
water can cause rapid and heavy fouling inside the condenser tubes, requiring excessively frequent
cleaning. Also, these conditions often lead to severe corrosion.
Chemical additives, including those to stop algae and related growths, should be obtained only from
a reputable, established supplier, and used specifically according to directions. Excessive treatment
of the water can cause more harm than good: and the condensers, pumps, piping, and the towers
themselves may be damaged.
It is advisable to double check the system to make sure that fouling is actually causing the trouble.
High head pressure alone does not mean a fouled condenser.