Merge pull request #3030 from Razharas/UnaryMachinery

General cryo and unary atmos machinery fix

code/ATMOSPHERICS/components/unary/unary_base.dm

@@ -51,6 +51,14 @@
 
 		update_icon()
 
+	default_change_direction_wrench(mob/user, /obj/item/weapon/wrench/W)
+		if(..())
+			initialize_directions = dir
+			if(node)
+				disconnect(node)
+			initialize()
+			. = 1
+
 	build_network()
 		if(!network && node)
 			network = new /datum/pipe_network()
@@ -82,6 +90,7 @@
 
 	disconnect(obj/machinery/atmospherics/reference)
 		if(reference==node)
+			node.disconnect(src)
 			del(network)
 			node = null