Vogt P-24AL, Руководство по обслуживанию

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P24AL & P34AL Service Manual
START-UP & OPERATION
12/2016
5-2
Start-up Checklist. Be sure to complete and return the “Warranty Registration/Start-up Report”
located in the front of the manual.
1. See that the water-inlet connections are attached properly. The water inlet shutoff valve (62) for
the water tank should be open. The water level in the water tank should be at a height where the
make-up float valve will be closed when the machine is idle and water is not running out of the
overflow (9).
2.
Fill the cooling tower sump and check the tower manufacturer’s installation and operation
instructions to make sure it is ready to run.
3. Check condenser cooling water pump rotation.
4. Check rotation of augers or ice handling equipment to make sure they are rotating the proper
direction.
5. Check all tagged valves and make sure they are in their correct operational position (opened,
closed, or automatic). Sight glass valves on the freezer must be closed prior to operation.
6. See that the electrical disconnect is closed and the proper power is supplied to the machine.
7. See that the compressor oil temperature is 100-110

F and there is no liquid ammonia in the
crankcase. The oil level should be 1/2-3/4 of the sight glass.
8. Check the elapsed time indicator (ET) and make sure wire #22 and #27 are attached.
9.
Reconfirm “Rotation Check” for cutter and water pump (See Section 3).
Refrigerant Charge. Prior to charging the machine with anhydrous ammonia (R-717), make sure
the system is leak tight and free of non-condensibles or other contaminants.
The machine will require a full charge of pure anhydrous ammonia. Make sure it is from a reputable
supplier who can and will furnish quality ammonia of Refrigeration or Federal Technical grade.
Grade
Minimum
Ammonia Content
Maximum
Water Content
Maximum
Oil Content
Maximum Non-
condensable
Fertilizer 99.50% 5000 PPM 5 PPM N/A
Refrigeration 99.98% 150 PPM 3 PPM .2 ml/g
Federal Technical 99.98% 200 PPM 5 PPM None
Metallurgical 99.99% 33 PPM 2 PPM 10 ml/g
Research 99.999% 5 PPM 1 PPM 7 PPM
TABLE 5-1
Ammonia Specification by Grade
(Reference IIAR Ammonia Data Book Chapter 1, General Information)
NOTE: Do not use Fertilizer grade ammonia.
Total ammonia (R717) charge required is approximately:
Dedicated System -
P24AL = 1000 lbs. P34AL = 1600 lbs.
Evaporator only - P24AL = 500 lbs. P34AL = 950 lbs.
Special precautions to be observed when charging refrigeration systems. Only technically
qualified persons, experienced and knowledgeable in the handling of anhydrous ammonia refrigerant
and operation of refrigeration systems should perform the operations described in this manual. All
local, federal, and EPA regulations must be strictly adhered to when handling ammonia (R717)
refrigerants. See “Material Safety Data Sheet”, MSDS Code 5B81-83, located in the Appendix A.