P24AL & P34AL Service Manual
SERVICING OPERATIONS
12/2016
9-18
Apply soap solutions with a narrow brush or spray bottle to all joints, welds, or areas of
suspicion. The solution will form bubbles if there is a leak.
Sulfur sticks and test paper can be obtained from your ammonia supplier.
Light the end of the sulfur stick and pass it around suspected points of leakage. A white cloud
will form where a leak is, even if it is very small.
Moisten a strip of test paper and pass it around the suspected area. If the paper comes in contact
with ammonia, it will turn red. Coils submerged in water, or condenser cooling water may be
tested by dipping a strip directly in the water. If ammonia is present, the paper will turn red.
Always remove refrigerant pressure from the vessel, tubing, or component part before repairs are
attempted.
Non-condensable Gasses.
Satisfactory operation of the machine is not possible if non-condensable
gases (usually air) are present in the system. Excessive condensing pressure is an indication of such
gases. Excessive condensing pressure in water-cooled condensers may also be due to the
accumulation of scale in the cooling coil or due to insufficient cooling water or excessive water
temperature. See Chapter 7 “Water-Cooled Condensers”, and Chapter 9 “Condenser Cleaning”.
Purging Non-Condensables
. Air and other non-condensable gases in a refrigeration system are not
desirable. Purging air from your Tube-Ice machine will greatly improve system performance and
save money.
Non-condensable gas effects are:
1.
Higher condensing pressure than what should match the condensed liquid temperature.
2.
Greater electrical power consumption.
3.
Reduced refrigeration capacity.
4.
Longer than normal compressor running time.
5.
Slow ice release and long thaw cycle.
Air collects mostly in high pressure condensers, receivers, and other high-pressure components. It is
most commonly found in the coolest, lowest-velocity area of these components.
Evaporative condensers usually have purge points at the top of the outlet header of each circuit.
Receivers usually have a purge point at the top, away from the inlet, where it is coolest and the gas
velocity is the lowest.
The freezer can be purged through the valve at the top of the suction accumulator, but should be
done only during the thaw cycle or after the system has been idle at least two hours.
Summary of Contents for P-24AL
Page 1: ...12 2016 P 24AL P 34AL TUBE ICE MACHINE Service Manual 5000 ...
Page 10: ...P24AL P34AL Service Manual TABLE OF CONTENTS 12 2016 vi ...
Page 15: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 5 Figure 1 2 P24AL Right Side ...
Page 16: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 6 Figure 1 3 P24AL Back Side ...
Page 17: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 7 Figure 1 4 P24AL Left Side ...
Page 18: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 8 Figure 1 5 P34AL Front Side Control Panel ...
Page 19: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 9 Figure 1 6 P34AL Right Side ...
Page 20: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 10 Figure 1 7 P34AL Back Side ...
Page 21: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 11 Figure 1 8 P34AL Left Side ...
Page 22: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 12 ...
Page 62: ...P24AL P34AL Service Manual START UP OPERATION 12 2016 5 8 ...
Page 84: ...P24A P34A Service Manual TROUBLESHOOTING 12 2016 8 12 ...
Page 110: ...P24AL P34AL Service Manual SERVICING OPERATIONS 12 2016 9 26 ...
Page 126: ...P24AL P34AL Service Manual TABLES CHARTS 12 16 16 11 8 ...
Page 130: ...P24AL P34AL Service Manual INDEX 12 2016 12 4 ...
Page 131: ...Appendix A ...
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