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ZUMA BREWER - OPERATION & SERVICE MANUAL 

Page 8 of 8 

0011 

Zuma Brewer (N016352) 

 

Important Information about Using a Zuma Brewer in Vista 2 Machines with D-Series 
& G-Series Rear Boards 

 

On newer Zuma brewers with a sealed breather vent on the front of the cylinder, you may 
experience some cycle problems if installed in an older Vista 2 with a D-series or G-series rear 
board. If a large cup of coffee is brewed on a newer Zuma brewer with a sealed breather vent, 
liquid may remain in the cylinder as the brewer cycles back to the home position. After a few cups, 
liquid may accumulate in the cylinder and cause inconsistent coffee levels and possibly cup 
overflows. The sealed Zuma breather vent causes the brewed coffee to drain out of the cylinder 
slower than the older non-modified Zuma brewer (prior to October 1997, without the plugged 
breather vent), creating this situation. This may also apply to Vista 3 machines with very early NT1 
software (prior to software version 2.6). 
 
 
To use a Zuma brewer in Vista 2 
with a D-series or G-series rear 
board, you need to make the 
following modifications. 
 

1.  Install a vent plug onto 

the front of the brew 
chamber. The part 
number of the vent plug 
is M014219. 

2. 

Remove the existing 
silicone plug from the 
vent hole on top of the 
brewer cylinder. 

3. 

Remove the existing 
silicone plug from the 
front of the brewer 
cylinder, cut the depth of 
the plug in half, and re-
install it.  

 
 
 

This is not a problem on Vista NT2 equipment (with software version 4.3 or higher), as the piston 
stops when it goes below the cylinder pour spout. This gives the liquid time to completely drain, 
preventing any accumulation. 
 
We recommend that you use the latest software versions for all NT or NT2 equipment. This 
ensures that the equipment always uses the correct Zuma brewer cycle, as well as eliminates any 
potential problems that may exist with earlier software versions. 
 
Unfortunately, this extra ‘pouring pause’ feature designed specifically for the Zuma brewer cannot 
be incorporated into D-series or G-series boards. However, if a non-modified Zuma brewer (without 
a plugged breather vent) is used, the brewed coffee will drain from the cylinder more quickly, 
reducing the chances of liquid accumulation. For this reason, we recommend that only Zuma 
brewers that have not been modified be used in equipment with D-series and G-series rear boards. 
 
 

!

 

Install vent plug to 

        front of brew chamber

 

"

 Remove existing plug 

from vent hole

#

Remove, cut and re-install 

      plug in front of cylinder

 

Summary of Contents for Zuma

Page 1: ...Page 1 of 8 November 24 2000 p n N016352 Zuma Brewer Operation and Service Manual ...

Page 2: ...he correct removal and installation procedure for the brew chamber is crucial Although the assembly can be easily removed for cleaning by lifting up the latch bar in front of the chamber the re installation requires some precision The wiper assembly on the chamber must be inserted between the two stainless steel arms located at the rear of the brewer These two arms can be easily located once the b...

Page 3: ...amber by lifting the latch bar and pulling it towards you 2 Push down on the H frame and lift the vertical rod T bar out of its recession 3 Add a stainless steel Zuma brewer shim full shim K011950 or half shim K011191 into the recession and re insert the T bar 4 Re install the brew chamber and test the brewer by making several cups of coffee NOTE In most cases this simple procedure is enough to st...

Page 4: ...e the screen assembly Once the screen is removed it should be thoroughly cleaned before it is re installed 1 Press the red LOAD FILTER TAPE button on the control panel to open the brewer 2 Remove the brewer from the machine 3 Remove the brew chamber assembly by lifting the latch bar and pulling the brew chamber towards you 4 Insert the Zuma screen extractor tool through the pour spout with the tip...

Page 5: ... cleaned every 1000 2000 cups even if it appears to be working properly Using the Zuma screen extractor tool remove the screen from the brewer to clean it We recommend soaking the screen in a solution of one part bleach to ten parts water for a maximum of 30 minutes as prolonged contact with bleach may damage the screen assembly Once this is done the screen should then be thoroughly rinsed with di...

Page 6: ... each end of the screen assembly These clips must be pointing downwards and to the right and left sides of the cylinder If they do not the screen assembly cannot be locked in place Zuma Brewer Screen Assembly 2 With the clips properly lined up push down on the screen assembly until it locks in place 3 Re install the brew chamber in the brewer Make certain that the wiper assembly is inserted betwee...

Page 7: ...ny button except the START button on the front selection panel This will exit the rinse cycle and return the unit to the standby mode a It will now be necessary to select the type of rinse cycle required For a brewer rinse press the COFFEE button on the front selection panel to begin the cycle b The piston will now move to the top of the cylinder water will pour in and the brewer will pause for ab...

Page 8: ... chamber The part number of the vent plug is M014219 2 Remove the existing silicone plug from the vent hole on top of the brewer cylinder 3 Remove the existing silicone plug from the front of the brewer cylinder cut the depth of the plug in half and re install it This is not a problem on Vista NT2 equipment with software version 4 3 or higher as the piston stops when it goes below the cylinder pou...

Page 9: ...and the H frame as illustrated below These shims must be added one at a time Do not add several shims at once as the tension may be increased too much In most cases this simple procedure is enough to stop the leaking However if the brewer still leaks at this point repeat the procedure and add one more shim start with one half shim if that s not enough remove the half shim and add one full shim Tur...

Page 10: ...se latch and pull it slightly If it is not properly locked in place you will be able to pull it out Failure to lock the brew chamber in place will result in the chamber moving forwards and then coming down on top of the plastic cylinder lip in front of the filter screen This can damage the brew chamber cylinder the arms and bearings and or the vertical rod housing General Maintenance and Adjustmen...

Page 11: ...ide View The wiper is gently touching the surface of the cylinder filter screen A slight deformation is seen on the wiper Perfect Tension Front View Slight bend on the wiper All coffee grounds will be removed from the surface of the filter screen Too Tight Side View The wiper is stretched and extremely deformed The brewer is under extreme pressure Too Tight Front View Very pronounced bend on the w...

Page 12: ...dicate that there is a larger load on it Permanent damage to the wiper may also result Figure 6 As the wiper moves across the top of the cylinder and filter screen there will be a very pronounced bend on it When it passes over the right most edge of the brewer cylinder and the pressure gets released from the wiper coffee grounds will be flung towards the right wall of the machine After only a few ...

Page 13: ...wer towards the wipe arm spring Figure 3 f Hook the smaller end of the wipe arm spring and pull upwards on the tool This will rotate the spring into position and allow you to secure the end of the spring small hook onto the inner part of the wipe arm Figure 3 g Turn the brewer shaft until the crank arm is in the 9 o clock position h Slide the unwipe arm into the brewer from the bottom i Place the ...

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