US Cellar Systems recently did some technical updates on the LPQ coil. This post is a brief explanation by Dan Phillips, the owner of US Cellar Systems, about the changes made on the LPQ coil.

Wine Cellar Cooling Systems Technical Update – LPQ Coil Changes

LPQ Coil Changes: The Aluminum Stub Tube

Hello, today we’re going to be talking about the LPQ coil. There’s been a few changes on it and we thought we should go over it because there’s been quite a few questions on it.

Aluminum Stub Tube – 1/2 inch Male Pipe Thread Coupling

One of the first changes you’ll notice is now instead of the aluminum stub tube coming at a 45 degree angle on the back, it now has half inch male pipe thread coupling coming straight down, so you can connect your PVC copper directly to the coil.

LPQ Coil Changes – The Wiring of the Fan Motors

The next thing we’re going to go over is on the inside – the wiring of the fan motors that are now being used. The fan motor is a multi-speed motor but we only use it on the medium speed, which is 900 RPM.

Fan Motor Wiring Changes

When you’re doing the wiring, you’ll note that there are 3 wires for the fan motor – a red, a black, and a white. And you have 2 wires for the Solenoid Valve, which are both blue. When you connect the wiring, ignore the red wire. You want to connect one blue to the black wire, which if you’re using our wire harness, will then connect to the red wire coming from the controller to the black and blue. The other blue wire will go with your white wire, and that will be connected to your neutrals. And that finishes the wiring for the fan motor. As I’ve said before, just ignore the red wire. It’s not used.