Vogt Tube-Ice HFO10, Руководство по обслуживанию

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8-4
Poor Ice Quality
Possible Causes Possible Solutions
Excessive concentration of solids
in the water tank, indicated by a
build‐up of mineral deposit on
the sides and bottom of the tank
Clean the water tank. Remove the freezer cover and clean the water
distributors. Adjust continuous blowdown.
Insufficient water supply
indicated by a low level in the
tank
Check water pressure — 30 psig [2 bar] is the recommended minimum.
Check for a water line restriction, partially closed valve, or defective
makeup water float valve. Make sure the water tank drain valve is
closed.
Water pump rotation wrong
direction Check rotation by referring to the arrow on the pump housing and
reverse two wires at the motor if necessary.
Low refrigerant charge
Check refrigerant level mark on the receiver and on the red portion of
the gauge glass guard. Perform a pumpdown if necessary. Keep the
gauge glass cocks closed when finished checking the level.
Insufficient blowdown during
harvest Check for proper operation of the siphon vacuum break valve. Check for
restrictions or traps in the water tank drain assembly.
Low Ice Capacity
Possible Causes Possible Solutions
Low refrigerant charge Check for and repair leaks. Add refrigerant.
Restriction in liquid line Check for a partially closed valve or an obstruction at the dryer, strainer,
solenoid valve, or expansion valve. The liquid line will normally have
frost on the downstream side of a restriction, especially as the suction
pressure decreases.
Float switch stuck or failed in
open position Make sure the float switch is opening and closing. Make sure the A valve
is getting power.
Thaw gas solenoid valve leaking
during the freeze period Check the manual opening stem to make sure it is in the automatic
position (stem screwed out). Check for leakage through the valve by
measuring sound and temperature differences. Close the stop valve at
the receiver to confirm suspicion of leakage. Repair or replace the valve
as needed.
Water distributors at top of
freezer are clogged Remove freezer cover and clean the distributors. Refer to Water
Distributors in Chapter 7.
Not enough water for ice making Check water pressure (30 psig [2 bar] minimum is recommended). Check
for a water restriction in the supply line or at the makeup water float
valve.
Makeup water float valve stuck
open, adjusted too high, or water
tank drain valve open or leaking Repair, replace, or adjust float valve as needed. Close, repair, or replace
water tank drain valve as needed.