This is a simple way to clean the suction-side tubing, flowmeter and check valve on a Liquidator. I am using borates, so the buildup of white scale is slow, but my system does need to be cleaned periodically.
Mix up a jug of muriatic acid diluted 5-to-1 with water. (Always add acid to water. Never add water to acid.)
With the pump running, disconnect the suction-side tubing from the side of the Liquidator. Quickly cover the fitting on the side of the Liquidator with a finger to stop the chlorinated water from running out and quickly put the end of the tubing into the jug of dilute acid. The dilute acid will be sucked through the tubing and fittings and within seconds everything will be clean. Reconnect the tubing to the Liquidator.
I was slightly worried about the dilute acid possibly damaging the spider gasket in the multiport valve or the heat pump core, or being sucked into the inlet of the Liquidator, although it seemed likely that the dilute acid would very quickly become even more diluted. Just to be sure I called Hasa and spoke to their Liquidator support specialist. It turned out this is the method that he uses to clean his own Liquidator.
It still may be necessary to periodically disassemble and clean the floats, but so far I haven't had to.
Side note - Since I am using borates I don't have the buildup of salts (aka "White Stuff") in the bottom of the Liquidator. When my Liquidator was new and I was anticipating having to periodically clean out the White Stuff I spoke with Hasa and they confirmed that a can or cup on the end of a stick could be used to "dip" out the salts instead of emptying the entire unit.