Pump Adjustment (Rotary Vane) - Single Group
Espresso & Steam Single Group Pump Adjustment
(Rotary Vane)
Objective:
Adjust pump on Espresso & Steam Single Groups featuring a 24vDC rotary vane pump via the adjustable bypass screw. Adjusting pump to 10 bars with a blank portafilter results in 9 bars at the group during coffee extraction.
SLAYER recommends adjusting the pump upon install and calibrating during bi-and-annual Preventative Maintenance.
For adjusting SLAYER Single Group's featuring a magnetic gear pump, pleasure review guide below:
For adjusting the pump on a two and three group SLAYER Espresso Machines, please review the guide below:
Tools:
- Blank Portafilter
- #2 Philips Head Screwdriver
- Small Flat Head Screwdriver
Espresso Single Group - Remove Rear Panel & Locate Pump:
- In the Advanced Menu - set Brew Pump Percentage to <90%>.
- For Espresso Single Group (Classic) which utilizes a magnetic gear pump. Click HERE to adjust pump pressure.
Steam Single - Remove Rear Panel(s) & Locate Pump:
Adjust Pump via Rotary Vane Adjustable Bypass Screw:
The brew gauge on SLAYER Espresso Single, Steam Single, and Espresso V3 reads live brew circuit pressure. For more information regarding brew gauge characteristics. Please review the Brew Gauge Guide.
- Steam Single: Switch Mode to <Manual>.
- Dispense five (5) seconds of clear water through group to rinse brew circuit.
- Engage blank portafilter in group head.
- Actuate group to Full-Brew, far left position.
- Confirm incremental pump adjustments between 5~10 seconds.
- Allowing group to run continuously during adjustment process can cause inaccurate results.
Pump adjustment is demonstrated on the Steam Single. Concept and steps apply to Espresso Single group as well!
- Observe brew gauge pressure reading:
- If gauge is below 10 bars - tighten pump by-pass screw to INCREASE pressure.
- If gauge is above 10 bars - loosen pump by-pass screw to DESCREASE pressure.
For each adjustment, large or small, remove blank portafilter from group and actuate brew group to relieve brew circuit pressure. This will allow for accurate adjustments.
SLAYER recommends all service be performed by an experienced SLAYER Espresso trained technician. For a technician reference near you, please contact SLAYER Support at (206)-284-7171 (#1 in Directory) or email support@slayerespresso.com.Questions or concerns? Please contact support@slayerespresso.com or call 206 284 7171 (#1 in Directory).
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