Vogt
®
VT Service Manual 8-1
Service Operations
8. Service Operations
PRINCIPLE OF OPERATION
The Vogt
®
VT Series line of ice making machines from Vogt
®
Tube Ice
®
, LLC, combines state-of-the-art
technology and efficiency with a reputation for quality and reliability developed over four decades of
manufacturing.
In the Vogt
®
VT Series icemaker, ice is produced on both walls of vertically suspended cylindrical tubes with
recirculating water. As ice is produced, makeup water is fed to the water tank via float valve. Freeze time
and harvest time are controlled by a Programmable Logic Controller (PLC).
In freeze cycle, the liquid feed valve is “open” (R404A machines only) and the compressor and water pump
are “on”. At the end of the Freeze cycle, the PLC initiates the Harvest cycle were the hot gas solenoid
valves and chopper motor are energized, and the water pump is turned “off” and liquid feed valve “closed”.
Bin control or remote on/off switch will allow machine to complete a freeze and harvest cycle prior to
interrupting operation. For R404A machines, the machine will go thru a Pumpdown before cycling off.
FIGURE 8-1
Piping Schematic