4H Warm-Up Check & PRE-HEAT Validation + Pre-Infusion Preset
~8 min
Medium
Created on September 27, 2025
3 views
Compatible Machines
El Rocio Zarre R
Related Links
Routine Overview
Verify the 4H architecture (brew boiler, steam boiler, PRE-HEAT, group head) reaches a stable state.
Confirm PRE-HEAT benefits with a short flush.
Choose the pre-infusion preset by roast level to reduce channeling and stabilize flavor.
Confirm PRE-HEAT benefits with a short flush.
Choose the pre-infusion preset by roast level to reduce channeling and stabilize flavor.
This is an AI-compiled routine. Please share your actual experiences and suggestions for improvement in the comments!
Routine Steps
Progress
%{completed}/%{total} completed (%{percentage}%)
1. Check 4H readiness
Confirm the group head PID has stabilized.
Wait for the steam boiler to settle to minimize heat loss pathways.
PRE-HEAT uses the steam boiler as a primary exchanger to support back-to-back shots.
Wait for the steam boiler to settle to minimize heat loss pathways.
PRE-HEAT uses the steam boiler as a primary exchanger to support back-to-back shots.
2. Validate PRE-HEAT
Lock an empty portafilter and run a 3–5 s flush.
Proceed if outlet temperature feels steady with no steam contamination.
Proceed if outlet temperature feels steady with no steam contamination.
3. Select a pre-infusion preset
For darker roasts, use “short pre-infusion + 9-step force.”
For lighter roasts, use “long pre-infusion + 7-step force.”
This improves wetting, reduces channeling, and enhances volatile extraction.
For lighter roasts, use “long pre-infusion + 7-step force.”
This improves wetting, reduces channeling, and enhances volatile extraction.
4. Test shot
Pull one shot and check temperature/flow consistency.
Fine-tune pre-infusion in 1–2 s increments if needed.
Fine-tune pre-infusion in 1–2 s increments if needed.
Start longer pre-infusion for light roasts to improve even soaking.
PRE-HEAT speeds up stability across the first 2–3 consecutive shots.
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