Icematic M502 - THERMOSTATIC EXPANSION VALVE

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SERVICE MODULARI 06/2014
6.10 WATER DISTRIBUTION SYSTEM
• The Water Distribution System function to eventy supply
w
ater to all cells of the evaporator plate.
The water pump pumps water from the sump to the tee.
From there water is channeled through the vertical tygon
tube to the water distributors, above the evaporator plate,
and from the holes in the distributor tube water flows to the
c
ells on one side of the evaporator plate.
Gravity flow returns the unfrozen excess portion of water to
the sump reservoir for recirculation.
6.11 WATER DRAIN SOLENOID VALVE
• The Water Outlet Solenoid Valve functions in conjunction
with the water pump to flushout the sump assembly at the
beginning first 40" of every harvest cycle. This action cleans
up and rinses the sump during each harvest cycle prevent
ing dangerous water minerales concentration.
6.12 THERMOSTATIC EXPANSION VALVE
• The Thermostatic Expansion Valve regulates the flow of re
frigerant to the evaporator and reduces pressure of liquid re
frigerant from condensing pressure to evaporating pressure.
6.13 WATER PUMP
• The water pump primes the water from the sump to the
w
ater distributor tube and through the distributing holes it
cascades down onto the evaporator cells by gravity so to be
frozen into clear ice cubes. The water pump remains off dur
ing the first 30" seconds of the freezing cycle to avoid any
cavitation problem while it's kept running during the first
1
0" of defrost/harvest cycle to drain out purge the remain
ing water from the sump reach in mineral salts.
6.14 WATER INLET SOLENOID VALVE  3/4" MALE FITTING
• The Water Inlet Solenoid valve is energised by the P.C. Board
during the beginning of the freezing cycle till the water
reaches the maximum level into the sump controlled by the
Water Level Sensor.
• After 3 minutes, from the start up of the freezing cycle, the
Water Inlet Valve is energised again for a short period to re
fill the sump with water till again to the max. level so to min
imise any possibility of slush ice formation.
A flow control, fitted into its outlet port, reduces the pressure
of the water flow.