Preferably utilize the
MMPP4301-EP glycol power pack. The pump for this unit is very quite. It is ideal for this application unlike the inefficient air cooled systems which can overload the keg storage refrigerator resulting in temperature fluctuations.
Always attempt to place gas sources outside of the refrigerator so that you can easily monitor the high pressure gauges for gas content in your cylinders. You will require two cylinders - a blend for the Guinness and CO2 for the ale. Or you could utilize a
dual gas blender. Pricey for home dispense but worth it if your budget allows.
If you are going the glycol route, do not skimp on the tower. Use a
glycol ready tower which is designed for use with the power pack.
When you are ready to install, refer back to the forum for specific details on balancing and connections.