Truckmounted machine freezing

Chuck970.....In Montreal Canada where I live -20 is a spring day, we walk around in our t-shirts and shorts.....It gets to -50 with the wind chill factor -70.....that's when we put on a pair of gloves and a wool sweater. When we say to run plumbing anti-freeze we know what we're talking about.....  

You can drain the unit and run little electric heaters that have built in fan that will move the air around the back. Just make sure you put the heater on something metal, just in case it malfunctions. If you have the van completely closed up this will work without any real concern for fire, because there is not enough air inside for anything to turn into a major blaze anyway. Also make sure you have it on a grounded circuit that wont trip if you turn on a light or something. This works even better if you have the van parked inside a garage as well.

Of course this is just my opinion and try this at your own risk. 

I blew High pressure air(75 psi+) through the system if it was not colder than -20C. After that anti-freeze was the only thing I used. Not worth taking a chance with equipment worth thousands for the sake of a couple of $$$.

I tried the windshield wiper stuff.....but when put through system it was hard to see the difference because of the dilution ratio, back then wiper fluid was only 49 cents / gallon  but not worth the chance to freezing the system.

That is the way I did it too.

doug wrote: Wate does not clean very well in the solid form???

Unless you heat it hot enough to turn it into the gaseous state. That is called STEAM?