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

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P24A & P34A Service Manual
START-UP & OPERATION
12/10/12
5-6
! IMPORTANT !
Complete the remaining part of the “Warranty/Registration Start-Up Report”
and return it to Vogt Tube Ice, L.L.C.
! IMPORTANT !
Check the refrigerant level at the receiver liquid gage glass to make sure it is near the operating level
mark.
Adding Refrigerant.
Add refrigerant while the machine is running by the following procedure:
1. With a cylinder of anhydrous ammonia laying on its side, cylinder valve outlet pointing up and
bottom end raised two inches higher than the valve end, connect an “approved for ammonia”
charging hose between the freezer charging valve (28) and the cylinder valve.
2. Purge all air from the charging hose and open the cylinder valve gradually to check for possible
leaks around the packing nut or hose fittings. Then open the cylinder valve fully.
3. While the “ammonia feed light is not illuminated, open the charging valve (28) and ammonia
will flow from the cylinder to the freezer.
4. Close the cylinder valve immediately when the ammonia feed light comes on and reopen it when
the light goes out. Repeat until properly charged.
! CAUTION !
Do not leave a refrigerant cylinder attached to the machine unattended.
Disconnect it immediately when the machine is charged or the cylinder is empty.
! CAUTION !
Operating Tips.
• Make sure the machine is left running in the “Auto” position. This will assure a complete
shutdown if a safety or overload is tripped.
• To initiate a harvest cycle, simply push the Manual Harvest push button (3PB).
• To interrupt the harvest cycle and revert to a freeze cycle, turn the Hand/Auto switch to “Hand”
and back to “Auto”.
• Too much ammonia in the condenser/receiver can contribute to high discharge pressure. Do not
go above 13 ½” for the P24A or 25” for the P34A from the center of the lower gage glass cock
while in normal operation. A higher level can begin to cover the condenser tubes and reduce
condenser efficiency.
• The circulating water overflow tubing will show that water is being slightly lifted up the tubing
near the end of the freezing cycle. If this action ceases and water begins overflowing from the
top water box, it is an indication that the tubes are freezing solid and the machine should begin a
harvest cycle. It is best not to freeze the ice solid with no hole.
• To cease ice production manually, allow the machine to complete the harvest period and start the
freeze period. When the “liquid feed” light comes on at the beginning of the freeze period, push
the “Stop” button to cease ice production.