Setting Expansion Valve on Steam X

Setting Expansion Valve on Steam X


Calibrating Expansion Valve on Steam X


Objective:
Expansion valves should be replaced as part of your preventative maintenance cycle. The style on the Steam X and V3 require calibration after installation.

Time:
15 minutes

Tools:
1/2" fitted wrench
Microfiber towel
Blank portafilter  

Parts:
46000-50110 Expansion Valve
46000-50150 Gasket, 1/4", Copper

Procedure 
Read through instructions before carrying out procedure.

Step 1:
Insert blank portafilter into group. 

Step 2:
Activate the group. Adjust pump pressure to 11 bar using the bypass adjustment on the pump.

Step 3:
Locate expansion valve on the inlet manifold. Place your microfiber towel below for safety purposes in case of water leaks.

Step 4:
With maximum intervals of 20 seconds, actuate the group to full brew with a blank portafilter installed. 
Adjust the expansion valve until it releases one drop every 3 seconds. If it is not releasing water, turn counter-clockwise. If it is releasing too much water, turn clockwise.

Step 5:
Once the spring pressure is set, adjust the pump back to 10 bar. The expansion valve should not leak at 10 bar. It should now only leak when the brew boiler is heating to allow for thermal expansion.



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