VOGT ICE TUBE-ICE P-24A, Service Manual

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P24A & P34A Service Manual
INSTALLING YOUR TUBE-ICE MACHINE
12/20/12
3-10
Piping and Drain Connections.
See Figure 1-1 to 1-8 for connection locations.
! CAUTION !
Exterior shut-off valves must be provided in the water
inlet lines. The minimum inlet water pressure for
satisfactory operation of the machine is 40 psig.
The maximum allowable pressure is 100 psig.
! CAUTION !
Model
Make-up
Water In
Flushing
Water In Compressor
Cooling
Water In Compressor
Cooling
Water Out Condenser
Water
In and Out Water
Tank
Drain Water
Tank
Overflow
P24A 3/4” FPT 3/4” FPT
72 gal/3 min. 3/4” FPT 1” FPT 3” FPT 2” FPT 3” FPT
P34A 1” FPT 3/4” FPT
104 gal/3 min. 3/4” FPT 1” FPT 5” FPT 2” FPT 3” FPT
TABLE 3-1
Water Supply and Drain Connections
(See FIGURE 1-1 through 1-8 for locations)
Make-Up Water In.
The water required for ice making must be potable water, safe for human
consumption, and should be of the highest quality available. The best way to determine water
quality is to have a complete water quality analysis by a qualified laboratory.
It is advisable to install a particle filter in the make-up and flushing water lines to trap dirt, sand, rust,
or other solid particles prior to entering the water tank and contaminating the ice. Be sure to size the
filter large enough to meet the water demands of 15 GPM (peak flow), allowing for a restriction
through the filter as it traps these particles. The inlet water pressure should be a minimum of 40 psi.
Refer to TABLE 3-1 for line size and TABLE 2-1 for average flow rate at various water
temperatures.
Flushing Water In.
Flushing water (blowdown) is necessary to melt ice fines and flush dissolved
solids from the water tank during the thawing (harvest) cycle. This function is important and helps
to maintain good ice quality. If water quality is superior, this blowdown can be reduced by installing
a smaller orifice in the flushing outlet elbow. Make sure there is enough flushing water to prevent
the accumulation of excessive ice fines in the tank.
If make-up and flushing water are from the same source, they can be connected by a common line to
the machine.
Compressor Cooling Water In and Out.
This water supply should be a maximum temperature of
85 ° F (29 ° C). It is used for cooling the oil and compressor heads. A thermometer and water
regulating valve are installed at the cooling water outlet. The regulating valve should be adjusted to
maintain a water outlet temperature of 100
° F (37.8 ° C) when the compressor is running. A solenoid
valve is installed at the cooling water supply inlet to prevent water flow through the oil cooler and
heads when the compressor is not operating. This is to avoid condensation of refrigerant in the
compressor during shut-down periods. The cooling water outlet should be extended to an open sump
or drain in order to observe water flow and temperature and to make sure there is no water flow