
P34AL-15 & P34ALOF-15 Service Manual
TABLE OF CONTENTS
ii
Page No.
Compressor Unloading..................................................................................................................................................3-9
Cooling Tower (optional) ..............................................................................................................................................3-9
Total Heat Rejection Requirements, TABLE 3-3..........................................................................................................3-9
Safety Valves ................................................................................................................................................................3-10
Freeze Protection, FIGURES 3-6, 3-7, 3-8....................................................................................................................3-10, 3-11
Wiring and Electrical Connections.................................................................................................................................3-12
Power Supply Connections, FIGURE 3-9 ......................................................................................................................3-12
Voltage Unbalance .........................................................................................................................................................3-13
Current Unbalance..........................................................................................................................................................3-13
Rotation Check...............................................................................................................................................................3-13
Auxaliary Controls or Equipment...................................................................................................................................3-14
Interconnecting Piping for Vogt P34AL-15 and Dedicated High Side, FIGURE 3-11 .................................................3-15
Interconnecting Piping for Vogt P34AL-15 and Central High Side, FIGURE 3-12......................................................3-16
Interconnecting Piping for Vogt P34ALOF-15 and Central High Side, FIGURE 3-13.................................................3-17
Interconnecting Piping for Vogt P34ALOF-15 and Central Screw Compressor, FIGURE 3-14...................................3-18
Interconnecting Piping for 2-Vogt P34AL-15 and Central High Side, FIGURE 3-15...................................................3-19
Interconnecting Piping for 3-Vogt P34AL-15 and Central High Side, FIGURE 3-16...................................................3-20
Interconnecting Piping for 2-Vogt P34ALOF-15 and Central High Side, FIGURE 3-17..............................................3-21
Interconnecting Piping for 3-Vogt P34ALOF-15 and Central High Side, FIGURE 3-18..............................................3-22
Installation Review: A Checklist...................................................................................................................................3-23
4. HOW YOUR TUBE-ICE MACHINE WORKS
Operating Features.........................................................................................................................................................4-1
Principle of Operation....................................................................................................................................................4-1
Freeze Period.................................................................................................................................................................4-1
Harvest Period ...............................................................................................................................................................4-2
Piping Nomenclature.....................................................................................................................................................4-2
Piping Schematic for P34AL-15, FIGURE 4-1 .............................................................................................................4-3
Piping Schematic for P34ALOF-15, FIGURE 4-2 ........................................................................................................4-4
5. START-UP AND OPERATION
Refrigeration System Review........................................................................................................................................5-1
Start-up Checklist..........................................................................................................................................................5-2
Refrigerant Charge ........................................................................................................................................................5-2
Ammonia Specification By Grade, TABLE 5-1............................................................................................................5-2
Special Precautions to be Observed when Charging Refrigeration Systems .................................................................5-2
Charging From Tank Truck (for dedicated high side only)...........................................................................................5-3
Charging From Cylinders (for dedicated high side only) ..............................................................................................5-3
Control Panel, FIGURE 5-1...........................................................................................................................................5-5
Start-Up .....................................................................................................................................................................5-5
Adding Refrigerant........................................................................................................................................................5-6
Operating Tips...............................................................................................................................................................5-6
Thaw Gas Regulating and Suction Regulating Valve Adjustment ................................................................................5-7