Ladede Senior Member Joined: 11 Sep 2003 Posts: 121 Location: WA Expertise: I love coffee
Espresso: Isomac Zaffiro Grinder: Mazzer Mini Roaster: Espresso Vivace
Posted Tue Jan 22, 2013, 10:26am Subject: Minco solid state thermostat install?
(Warning: I also asked unsuccessfully on H-B: Click Here (www.home-barista.com) If you are a member of both forums, please pick one to respond. Thanks a lot!)
Is there anybody here who's done a Minco thermostat install (CT325PD1C1 controller along with a ribbon sensor and an AC relay)? I'm looking for information... I am looking to replace my thermostat (I snapped the copper lead from the bulb) and this might be a nice option if it's not too expensive (vs a few tens of dollars for a stock bulb thermostat)... I am looking specifically for two things: 1/ caveats/instructions on the wiring, 2/ guidance on where one puts the temp sensor (ribbon)? Thermowell? Side of the boiler?
There is a six-year old thread here... The poster seems to not have been active since, and part numbers have changed (though Im pretty sure the right sensor would be a S17624PDZxxB or xxA).
There may also be a better solution for the money, or a cheaper equivalent position... I'd like to improve on the bulb thermostat but am not willing to spend much over $100.
Posted Tue Jan 22, 2013, 11:31am Subject: Re: Minco solid state thermostat install?
How about: 1 - a link to the thermostat's sale page, p[hotos, specifications, schematic...? 2 - Installed on WHAT? 3 - Photos of where it is going (mounting location, wire placement, etc.). Unless I missed something, there is little to comment or advise upon.
sgreen Senior Member Joined: 4 Apr 2011 Posts: 63 Location: Minneapolis Expertise: I love coffee
Espresso: Viblemme Replica, ECM... Grinder: Mazzer Major and Mini,... Drip: Technivorm Moccamaster Roaster: Behmor 1600
Posted Thu Jan 24, 2013, 4:39pm Subject: Re: Minco solid state thermostat install?
Minco is only a couple of miles from me, so I called them about this control.
They have $100 minimum and you are going to need a controller, power supply, solid state relay, and temperature sensor. The controller is $69, but bear in mind that they build these to minimum order quantities and your selection is limited to whatever over run they just happen to have in stock.
I didn't find them cheaper anyplace else. If you know of a vendor, please let me know. They're pretty neat.
Depending on the model number, the thermocouple type and required voltage of the power supply are variable. If you get your hands on one, make certain that you source an appropriate thermocouple and power supply specific to your device. All told, you are probably going to be in the $120-150 range.
If I was going to do it on the cheap, I'd try one of these:
It's pretty much the same device with a display and buttons.
I would have some concern about overshoot though. It's just one of those things you try and see how fast the controller can respond. The value of the PID control is that you can adjust for that type of thing.
It's not elegant, but you can put the thermocouple on the boiler somewhere under the water level and hold it in place with under a piece of silicone held in place with a stainless hose clamp.
If you can find room to make it fit, the rest of the wiring should be somewhat obvious. If it's not, either forget the whole thing or make sure you have new batteries in your smoke detectors.
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