[Spruce]

I've just had a root about in the van . And found a spare digital varistream controller . The same I use on the van mount . If I was to swap this with the one on the trolley , would that work ok . Plus would it do away with that 4 second delay . Cheers

If I was to swap this with the one on the trolley, would that work ok. = Maybe it would or maybe not.  Again the issue it that the Varistream is designed around the Shurflo pump. Your pump isn't drawing anywhere near the current (amps) a Varistream needs to work successfully at. The only way you will see is to connect it up and try it. Connect it the same way as your Spring controller is.

Would it do away with that 4 second delay = No. Both controllers work the same way. They incorporate electronic pressure switches in their electronics. The higher the pressure in the pipework the higher the current draw to achieve that pressure. So by calibrating a controller, you are actually telling the controller the maximum amount of current to allow the pump to draw before switching the pump off. The only way for the controller to test if that instruction still applies it to send out a test pulse to try to start the pump. It does this every 4 seconds. Its a pain sometimes, but the benefit is that the controller does conserve power.

As said earlier, the Nano trolley has reduced weight by supplying a smaller battery and a smaller pump. The 'old' PF trolley had a heavy lead acid battery and a Shurflo pump, which to be honest was overkill for a trolley, which in real terms, is a backpack on wheels. The problem with the first trolley was that the system was heavy to lift in and out of the vehicle - hence the reason why they were converted to a van mount in some cases.

[Steven Biggs]

Right . I think I am finally getting my hhead round how it all works . It’s onlt taken 10 years . Spruce you are wasted as a window cleaner . Thanks  again .