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I apologise for the delay in coming back to this thread. While the majority of these posts on HLT HERMS were finished in January, I then took on a consulting contract which has taken the vast majority of my time since. Having completed most of the measurements, pictures, graphs and text, I am...

HLT HERMS - Servo control for Proportional Mixing. None of this is relevant if you are looking at solenoid driven valves! Please note - this does not include finished detailed circuits, it is a few ideas for those who know a bit of electronics. I have made something along these lines but have...

HLT HERMS - Control Panel construction: This panel is designed for no more than 10 Amps - i.e. one 2.4KW kettle element or similar. The constraints are due to the Temperature Controller internal relay. Thus the mains IN/OUT connector is suitable for 10A maximum. If you need more, you should...

HLT HERMS - Valves and plumbing. Having investigated the use of currently available solenoid valves and in the interest of flexibility and cost I propose a new technique for use with HLT HERMS. I have experience in the use of solenoid valves from many years ago. The market has changed...

The following waffle will be of absolutely no interest whatsoever to the majority of Forum Members; some of it might be of use to anyone considering HERMS - even if you are planning a separate HERMS vessel. In order to settle upon heat exchanger coil sizes, flow rates and so on, I did a series...

RIMS and HERMS do not produce better beer, but by enabling a closer control on the mash sequence help you to brew more consistently. I have been using RIMS for over 90 brews. As I see it, the major advantage is that you do not have to hit your strike temperature spot on first time, in fact it...

In the interest of forum harmony, this post has been edited by THBF admin team and will not be discussed further.

I really do not advise using an ordinary DVM with bleep! You need an earth bonding meter to be sure of the integrity. This passes a significant current through the test piece. If there is any corrosion in the connections, this will not show at the very low currents used by the average DVM. For...

We are talking RMS, nothing to do with peak or DC. An SSR passes the full waveform, it does not rectify. As for the 415/240 bit, just consider your local electricity distribution. 415V is the phase-to-phase voltage. 415V 3 phase comes from the nearest major step-down transformer and an equal...

Timbim is spot on with the wiring and plenty close enough with the sums. I think I would go with two in series and leave the third as a spare - which ties up with Springer's idea of "extinct". However, as you would be running the elements at 1/4 rated power, the chances of a failure would be...

If the supply voltage was 415V 3 phase, the line to neutral voltage will be 240V. If you have elements which are connected without a star centre point, the elements are designed for 415V. If you have a star point, isolated or not, the elements are designed for 240V. So, with a star point...

Controller: http://www.westmexico.com.mx/pfd/west/m ... Manual.pdf So it is a PID. (I notice it has a lithium battery - this will almost definitely need replacing.) Heaters: 9KW 3 phase - but what voltage? Wired in star or delta? center neutral or no neutral connection? If 415V, each...

We used to call this "construction with the aid of a cheque book"! A second example of using the HLT as a HERMS, although I have not read enough of the article to understand the control loop. However, this time there seem to be no control valves - must do done by the pump on/off? It does state...

Spot on Pjbiker! It is good to know that there is a system working somewhere. I am surprised the coil is as long as that, and I suspect that if he left the pump running he might kill all the enzymes eventually - however it does not matter if you kill a few. Now to see if it can be made to ramp...

+1 to Evanvine in this case, but as Mysterio says, a starter would prove viability (health). The first couple of times I used White labs I was somewhat disappointed with lag time, even though the yeast was in date. Then I found out that the 5 gallons is US, not UK! (And I was trying to ferment...

The transfer of heat is dependent on three factors: 1. The difference in temperature 2. The thermal conductivity 3. The surface area The thermal conductivity can be largely ignored here is it refers to the copper of the immersion cooler (but see b below). So for maximum heat transfer you...

Thanks Aleman - I will be measuring the temperature differential in the HLT to find out if it is significant. As I said before, the actual temperature is not important as long as it stays hot enough to add heat to the exchanger coil. The action of the exchanger coil might reduce stratification...

Thanks Unclepumple, I hope I can call upon your experience if this thing is ever to be useful! I am hoping that a damper would be unnecessary as it would add to cost and complexity, I am also hoping that some of the valves might be lost, but I fear there may be more, so cleaning will be an...

This is my current idea and probable starting point: The row across the middle are valves, the restrictors probably screwdriver adjusted, the others lever/ball. Sparge and Underlet are shown for completeness. Heated full flow would be open and Bypass stop flow closed for mashout. The pump will...

Unclepumple, well yes, you have missed something - I covered denaturing in my second post in this thread. And yes, using a PT100 in the return, as Pjbiker proposes, and I already use on both my systems, is obvious, the thermal inertia of the volume of the mash makes feedback loop control near...