6
Version date: March 27
th
2018
28
Operator Manual
NA 3338 Rapid Combi APM
6.2 How can I get the best yield from the machine
The machine must be running at a stable speed with a constant air/mix balance
in order to achieve the best yield. If this air/mix balance is not constant, your ice
cream will be soft or wet or your machine will make a rasping sound, you will
experience a popping from the tap opening or the machine's display will show the
indication LO. If one of these situations occurs, you should first check that the
mix pump is still functioning properly before changing any of the machine's
settings.
6.2.1 How can I check whether the mix pump is not causing a malfunction
The proper functioning of the mix pump is easy to check by then carrying out the
following two actions:
1.
Place a drop of water on the nozzle and draw off a tiny piece of ice cream.
The drop of water should now be drawn into the nozzle valve.
2.
Draw off a normal ice cream. The pump should stop within two-to-three
strokes.
If this is not so in one or both of these cases, you should first remove the mix
pump from the machine and clean it (see pararaph 7.3.14).
After replacing the mix pump in the machine, you should first draw off 20-to-25
ice creams before you can judge the result.
6.2.2 What should I do with a soft or wet and watery ice cream
A soft or wet and watery ice cream is normally caused by too little air in the ice
cream. In some cases, too high a temperature of the ice cream, above -5° C can
also make the ice cream soft or wet and watery. You should then carry out the
following steps in order to make your ice cream a little drier and firmer:
1.
Measure the temperature of your ice cream. If it is over -5° C, you should
increase the viscosity by half a point (see pararaph 5.8.1).
2.
If the temperature of the ice cream is below -5° C, check first if the hole in
the nozzle on the nozzle valve is blocked. If this is the case, clean the nozzle
thoroughly and replace the nozzle on the nozzle valve. The air/mix balance
will then be restored and drawing off 20-to-25 ice creams will improve the
quality of the ice cream.
If the soft or wet and watery ice cream was not caused by point 1 or 2, you
should place a nozzle with a larger hole onto the nozzle valve.
The nozzles in your spare part box go up in steps of 5. You should place the nozzle
with the next higher number onto the nozzle valve. If for example, you use nozzle
70, you should fit nozzle 75.
The air/mix balance will then be improved automatically and drawing off 20-to-25
ice creams will improve the quality of the ice cream. If you do not see any
improvement after drawing off 20-to-25 ice creams, place the next higher nozzle
and repeat this process until you are able to draw off a dry and firm ice cream.