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This is a quick list of parts durring the assembly of my brewing system.

 

Overall chasis will be a 48" x 18" wire shelving unit

 

 

Chasis Power

Overall Power will be provided, at the moment, by a 110V standard wall outlet.  This wall outlet will provide 110v to (one lead) the SSRs and (the other lead) to each heating coil.  This same supply will power a standard 400W ATX computer power supply.

Shorting Pin 16 with a momentar switch will turn on the power supply, and a larger breaker / GFI switch should be placed inline with the AC for controlling power to the chasis.

 

 

 

HLT

Parts :

1ea Keg, 15.5 Gal.         Tinnell's Keg Program  Keg gets 4 holes cut in it :

​Name (location), purpose​Size
​Top(Top), Add water to be heated​10"
​Temperature(4.75" from bottom / 3 Gal mark), mount for temp sensor​1/2" NPT Bung + fitting
​Heating element (2.25" from bottom / 1 Gal mark), mount for heating element​1" NPT Bung
​Drain Valve (Bottom BDC), mount for electric SS valve​1/2" NPT Bung

 

 Container will be wrapped in bubble insultation.

 

Mash Tun

 

RubberMaid 10Gal w/ false bottom or bazuka tube

 

 

Boil Kettle

 

Parts :

1ea Keg, 15.5 Gal.         Tinnell's Keg Program  Keg gets 4 holes cut in it :

​Name (location), purpose​Size
​Top(Top), Add water to be heated​10"
​Temperature(4.75" from bottom / 3 Gal mark), mount for temp sensor​1/2" NPT Bung + fitting
​Heating element (2.25" from bottom / 1 Gal mark), mount for heating element​1" NPT Bung
Stainless Steel Manual Ball Valve(1.5"?), drain to fermenter​1/2" NPT Bung

 



 

Controller

Control will be provided by a Raspberry Pi (RasPi), and likely two Arduinos or MSP430 microcontrollers.  These devices will be powered by ATX PSU.

The RasPi will have a base install of Raspbian installed on a 32GB micro-sd card, loaded in a pi-adapter.  The base of the system will be implemented through using webiopi.

 

Heating

Heating provided by heating element.  Control of the heating elements will be provided by a solid state relay, rated for 40 amp in case I decide to upgrade to 220v and the more efficient heating unit.

Solid state relay will be triggered by (NPN transister?) ; the SSR requires technically 3v to engage, however there are reports stating that these

 

 

Temperature Sensing

K-Type thermocouple will be used, connected to a MAX31855.  This uses SPI, RasPi can support two of these devices

 

 

Transfer

Valves require 110v x 1.2 amps to actuate, therefore a couple SSR's will again be required, plus a couple (NPN's) to make them actuate reliably

 

 

Considerations

  1. Max amerage for the entire chasis should be limited to 15 amps total ; no other devices should be plugged into the circuit.
    1. Heating elements are rated 1500 watts at 120v = 1500 / 120 = 12.5 amps
    2. SS Electric actuated valve = 1.2 amps
    3. RasPi = 1 amp
    4. (As reported by Kill A Watt) Idle, powered on PSU uses about 1/10th of one amp