Technical Support
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Frequently Asked Questions
GENERAL QUESTIONS
Can the roaster do a true max batch capacity roast?
Yes, our roaster can roast a true max batch. However, batch capacity and roast capacity per hour depend on the type and quality of green coffee, the degree of roast, and the moisture content of the beans.
What makes Diedrich different from other roasters?
Diedrich roasters are designed and built for roasting specialty coffee. Its design is based upon a higher ratio of conductive over convective energy supply to the beans when comparing to other conventional roasters on the market.
This allows you to roast each variety and origin to its optimum quality and flavor profile.
What is the roaster warranty?
One-year warranty on the craftsmanship of the roaster.
Can I get financing?
We work with several trusted financing partners.
Delivery time?
Delivery time is based on production’s current schedules and can range for IR roasters from 8-12 weeks, and for CR roasters, 4-6 months.
Options available, what comes standard?
There are a number of options available for the roasters. Options vary depending on the size and model of roaster. All roasters come standard with Data Logging and Roasting Lamp.
Is training included with the roaster purchase?
Training is not included with the roaster purchase. However, we do offer a three-day roasting seminar held at our headquarters in Ponderay, ID or our Chicago office. Incentives are offered when purchasing a roaster.
What is the difference between data logging and automation?
Our automation features allow you to download roast profiles. The roaster will automatically roast the batch of coffee from charging in the roaster through roasting, cooling, and destoning.
The data logging package provides a USB port at the control panel to connect to your laptop or tablet. Commercially available softwares for roast profiles can be uploaded to track your roast profiles.
Using the data logging feature, requires the operator to adjust temperatures, airflow, and time to discharge the batch.
Is our drum single walled or double walled?
Our drum is a single walled drum designed for optimal conductive energy transfer from the air to the drum and from the drum to the bean.
What’s the best way to determine what size roaster to buy?
Determining the size of roaster is dependent upon the customer’s hourly and weekly capacity demand for roasted coffee.
What other equipment beside the roaster may be needed?
Depending on your location, an air control device such as a thermal or catalytic oxidizer. Depending on the roaster size, you also may need a green coffee loading hopper with conveyance system.
If a problem should arise, is Tech Support available?
Yes, tech support is available and can be reached during our business hours listed below.
Diedrich Technical Support Hours
Monday – Friday | 7:00 a.m. to 3:30 p.m. | Pacific Standard Time
Call Us Toll Free: 844-343-3742
TECH SUPPORT QUESTIONS
I have no power to my roaster. What should I do?
Make sure the “Emergency-Stop” button is pulled all the way out and the reset button has been pushed.
If you have an Automated roaster, ensure all of the breakers in the electrical panel on the side of the machine are in the up position.
Today as I prepared to roast, I turned on the drum and blower and then the gas but the red gas light on the panel did not light up and there was no clicking sound that ignites the pilot light. I looked inside the electric panel and do not see anything out of the ordinary, no burnt wiring etc. Is there something that I can check myself to find the problem?
Frequently the cause of ignition trouble is a dirty roaster. When cleaning, be sure to clean the vacuum sensor tube, the ducting, and the cooling bin screen to make sure air can move freely.
We are getting an air failure light on the control panel and when we put air through the roaster, we can’t get it to light. Is there a sensor or something we need to check?
If you are seeing an air failure, you’ll want to start by cleaning the roaster and ducting, scrape down to metal and check the vacuum sensor tube, This tube senses air flow through the roaster.
Use a small tool to clean out any debris to clear the tube. DO NOT put a vacuum on it or blow compressed air through it. We will also want to ensure that the blower shroud, internal roaster pipes (back exhaust elbow) are all in place and doors are shut tightly.
The manometer on my roaster appears to be sluggish and/or has a bouncing needle. How do I fix this?
This process works better if you have two people performing it. First, locate the brass limiter valve on the gas line leading to the gauge and unscrew the cap. Under the cap, you’ll use a flathead screwdriver to make minimal adjustments.
Have another person turn the fuel up and down and make ¼ turn corrections until the movement smooth’s out and is not sticking. The knob has more play in it than you actually have control over the valve so it will take a moment to get used to the control range.
Can we convert our roaster from propane to natural gas or natural gas to propane?
Yes, this is just a matter of changing out a few parts and making valve adjustments. Gas conversion kits can be purchased from Diedrich Roasters Technical Support.
Should paint be chipping on the inside compartments of my roaster?
It is normal for paint to chip off on the inside of your roaster. If you are cleaning the way you should, (scraping down to metal) the paint on the interior compartments does come off. The light dust and chaff can be vacuumed or brushed off but after about 40-hours of roasting, or sooner if you do a lot of dark roasts, coffee oils start to build up on the chaff/dust creating a thick, hard coating that needs to be scraped off.
A scraper or chisel will do the job. The whole roaster’s performance depends on good airflow and it only takes 1/8” of buildup before you’ll notice a change in performance.
What are some back-up parts to have on hand?
Frequently ordered spare parts are:
How do I clean the drum of my roaster?
The drum in your roaster is similar to a cast-iron skillet and doesn’t require cleaning. The oils from the coffee are needed in order to prevent the beans from scorching. If you look in through the view window or the drum door and see a black coating on the drum – that is normal and should be left alone.
If a problem should arise, is Tech Support available?
Diedrich Technical Support Hours
Monday – Friday | 7:00 a.m. to 3:30 p.m. | Pacific Standard Time