NOR Coffee Roaster

Operating with Normon

UPDATE

21.10.2025

Coffee Knowledge

Coffee Machine

Coffee Roasting

NOR

Guide

Preparation & Normon Ai

This guide is intended for all coffee roasters that can connect to Normon Ai via Wi-Fi, although it also works with a USB connection.

Normon Ai
Beyond Data Logging, Roast Log Data Analytic & Artificial intelegent (AI) Forecasting, Connectivity & Control for Coffee Roaster Machine.

Download and install Normon Ai on your device.
Install and prepare your machine and gas. You can find detailed information and instructions here: Machine List
If the electrical voltage of your power line fluctuates significantly, it is necessary to invest in a stabilizer.

Grounding

Usually the stainless or rustproof grounding rods of the grounding installation have a length of 1 to 2 m. Ensure that this installation has been carried out correctly by qualified personnel. Multiple machines can be connected to a single grounding system.

Because the engine has a spark plug to ignite the burner, which causes significant noise, the noise itself cannot be completely eliminated but can be minimized by installing a grounding system. This is to prevent system malfunctions or engine interference, especially in the ESP or core of the NOR engine, which is quite susceptible to noise interference. Therefore, installing a grounding system is very important and mandatory.

The ignition coil of this machine needs to be grounded specifically and not connected to any ground, including the house's ground terminal. Due to the large spark it produces, it must be grounded directly.

If you at the machine, there are two grounding points: one specifically for the ignition and the other specifically for the engine. If possible the distance between these to ground points on the should be at least 1 m. The goal is to prevent malfunctions. While the initial effects may not be noticeable, in the long term, they can shorten the machine's lifespan. That's why grounding is crucial.

General Setup

This is the general setup for starting your roasting session.

Start the roasting machine by turning the red knob clockwise and then releasing it. If the Failure indicator light on the control panel lights up, check that the power cable is properly connected.
Setup the Airflow by doing the lighter test.
Check the gas bottle's fill level and connect it to the roasting machine. Then, open the tap on the supply line. The maximum gas pressure reading on the manometer should be 100 mbar. If this is not the case, adjust the valve on the gas bottle.
Note: For machines with a capacity of 5 kg or more, the gas and water inside the gas cylinder may freeze (because of chemical reaction) after a few roasts. This would then cause the pressure in the pressure gauge to drop slightly and the flame to go out. To prevent this, you can place the gas cylinder in a container of hot water. Later, you may need to add hot water.
Turn on your device and connect it to the roasting machine via Wi-Fi. The name of the machine will appear in your network list. You can find all the data on the control panel. Name example: NSeries_Anindya_925m.
Open the Normon Ai app and click on Roast Log. Then, open the Menu (icon, top left), click on Profile Machine, select your machine series and click on Safe.
Click on the green power button (power icon, top right) to connect the coffee roasting machine with Normon Ai.

Roasting Settings

Recommended Information:

What is RoR (Rate of Rise)? by NOR Coffee Roaster
Coffee Roasting - Best Practices by Scott Rao

The values given are approximate and may differ from the actual values of your machine.

Machine size & series - Roasting settings	250 g N series NOR Kit	1 kg N, A, C series	2 kg N, A series	5 kg N, A, C series
Drum Speed	80 rpm fixed	70 rpm	70 rpm	60 rpm
Heat up	Wait until the BT reach the BT PID temperature and the BT and DT start to flicker. This should take 9 to 10 minutes. If this takes longer, turn the BT PID 10°C up. Afterwards, reset the Roast Log by pressing the red reset button (on the right) and start to count the heat up time.
Burner	30 mbar	~ 50 mbar	~ 50 mbar	40 - 50 mbar
Airflow	40 - 50 %	40 - 50 %	40 - 50 %	30 %
PID Temp. A = Arabica R = Robusta	A 150°C R 160°C	A 150°C R 160°C	Badge 2 kg A 180°C R 190°C Badge 1 kg A 170°C R 180°C	Badge 2,5 kg A 190°C R 200°C Badge 5 kg A 210°C R 220°C
PID Temp. A = Arabica R = Robusta	The BT PID setting depends on the optimum turning point and the roasting time. If the roasting time is too long try a higher heat up BT PID temperature (e.g. + 10°C).
Time 1. Batch	5 min.	5 min.	5 min.	8 - 10 min
Time between Batches	3 min.	3 min.	3 min.	5 min.
Charge	Open the hopper until all the beans have fallen into the roasting drum. Then close the hopper again. If the roasting time is too long, you can also adjust the Burner during the charging process instead of at the turning point.
Turning Point	The optimum turning point ist between 80 - 100°C and 1 to 1.5 minutes. If the turning point is set too high, the beans will dry too quickly and the result will be a bitter taste.
Burner	~ 60 - 70 mbar	~ 80 - 100 mbar	~ 80 - 100 mbar	~ 80 - 100 mbar
	Adjust the BT PID temperature according to your desired roast profile.
	If necessary, turn down the burner slowly step by step to reach the dry end in 4 to 6 minutes. Start with 100 mbar (NOR Kit excepted). If the estimated Dry End is too fast, lower the burner.
Airflow	90 %	~ 60 - 80 %	~ 60 %	~ 60 %
Airflow	Setup the Airflow by doing the lighter test.
Dry End	~ 140 until 160°C, optimum is 4 to 6 minutes
Burner	Adjust the burner to reach the First Crack in 8 to 10 minutes and a RoR of ~ 12 to 15. You don not need to do changes if the First Crack prediction is within the optimal time window and the RoR does not increase. The RoR should decrease over time.
First Crack	~ 180 until 200°C, optimum is 8 to 10 minutes
Burner	Adjust the burner carefully to avoid rises, crashes and flicks.
Second Crack	~ 215°C
Roast Profile	Check the coffee at the tryer/spoon checker to see the desired roasting profile. Light: ~ 190°C \| Light-Medium: ~ 193 - 197°C \| Medium: ~ 200 - 210°C \| Medium-Dark: ~ 213 - 225°C \| Dark: > 230°C
Drop & Cooling	Switch on the cooling system; this will also switch on the agitator. Open the drum door, fix it in the open position, let the beans fall in the cooling tray. Change the Air Flow to 100 to cool down the drum temperature. The aim is to cool it (BT & ET) down to the initial charge temperature of the previous badge. The coffee take about 3 to 5 minutes to cool. Then let the roasted beans drop through the outlet flap into a container. Aim to cool the drum temperature to the same initial charge temperature of the previous badge. Then redo the preheating.
Roasting Time	Fast Roast: 10 to 12 minutes Ideal Roast: 12 to 15 minutes Slow Roast: 15 to 20 minutes