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Zuma – Adjusting & Handling (N016568) 

December 4, 2001 

Page 2 

Brew Chamber Installation 

  The 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 brew chamber assembly is removed. 

Failure to properly align the brew chamber during 

installation may result in excessive brewer damage.

 

 

  When re-installing the brew chamber, make certain it is properly locked in position. Gently grip the 

top of the brew chamber (

not

 the release 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 Adjustments 

 

 

Never turn the brewer backwards. 

This will damage the arms and bearings and possibly the 

cam. 

 

 Use 

only 

the VKI designed screen extraction tool (illustrated below) to remove the re-useable filter 

screen. The use of any other tools will damage the brewer. 

 

  When performing a brewer rinse, 

use only VKI approved powder cleaner

. Any other chemicals 

or detergents may damage the brewer. 

Do not, under any circumstances, soak the brewer’s 

plastic parts in brewer cleaner

 for prolonged periods of time 

(maximum is 30 minutes).

 

 
 
 
 

Lift Latch and Pull 
Brew Chamber 
Towards You 

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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