Vogt TUBE-ICE 03TA, Service Manual, Page: 46 / 122

03TA Service Manual
HOW YOUR TUBE-ICE

MACHINE WORKS
3/31/2014
4-2
discharge line, and a check valve (101) in the liquid return line to the receiver. These valves prevent
the migration of refrigerant to the condenser when the machine is not operating.
Freeze Period
The Tube-Ice
®
is frozen inside the stainless steel tubes in the freezer (2) by the direct
application of refrigerant to the shell side (outside) of the tubes. The ice is produced from constantly
recirculating water during the freeze period. As the ice thickness increases, the freezer suction
pressure decreases. At a set pressure, the freezer pressure switch initiates the harvest period.
Harvest Period
When the freezer pressure switch (56, FPS) contact closes, a control relay (CR) is
energized. The “CR” relay stops the water pump and starts the cutter motor. The “A” (liquid line)
solenoid valve closes, the “D” (thaw gas) solenoid valve opens and the thaw timer (T) is energized.
As the ice releases and drops through the rotating cutter and onto the cutter disc, it is discharged
through the side opening of the water tank. The harvest timer (T) is to be set for the time required to
discharge all the ice plus 30 seconds longer (usually 2 1/2 minutes).
! CAUTION !
Make sure all the ice clears the freezer with at least 30 seconds to spare
before the next freeze period begins. This is to prevent refreezing.
! CAUTION !
Item No. Description Item No. Description
1 Control Panel 32 A/C Condenser Service Connection
2 Freezer 34 Compressor Suction Service Valve
3 Compressor 35 Compressor Discharge Service Valve
4PS Dual High/Low Pressure Switch 37 Oil Charging/Drain Valve
5M Cutter Motor 39 Water Tank Drain Valve
5R Gear Reducer 40 Automatic Water Tank Blowdown
6 Water Pump 41 Condenser Water Regulator (W/C Machines Only)
6A Water Pump Check Valve 41A Condenser Pressure Control (A/C Machines Only)
7 Water Tank (includes cutter assembly) 43 Liquid Feed Solenoid Valve Strainer
8 Water Distributing Chamber 46 Filter Drier
12 Make-up Water Float Valve 48 Muffler
13 Heat Exchanger 50 Receiver Safety Valve
14 Oil Separator 51 Freezer Safety Valve
15 Condenser 52 Condenser Safety Valve (W/C Machines Only)
15R Receiver 53 Cold Weather Solenoid Valve “X” (A/C Machines Only)
16 Thawing Chamber 55 Discharge Line Stop Valve
17 Thermal Expansion Valve 56 Freezer Pressure Switch (Inside Control Panel)
18 Thawing Gas Solenoid Valve (“D” Valve) 58 Liquid Outlet Valve (King Valve)
20 Liquid Feed Solenoid Valve (“A” Valve) 69 Freezer Pressure Stop Valve
23 Condenser Water Inlet (W/C Machines Only) 88 Accumulator/Heat Exchanger
24 Condenser Water Outlet (W/C Machines Only) 90 Thawing Gas Stop Valve
25 Water Tank Drain Connection (3/4” FPT) 91 Receiver Liquid Return Stop Valve
28 Refrigerant Charging Valve 94 Compressor Oil Pressure Safety Control
30 Receiver Gage Glass 101 Check Valve
31 Gage Glass Stop Valve
TABLE 4-1
Piping Nomenclature