I thought that myself too... bought an interpump pump/motor/unloader as an all in one thing, just needed electrics... I'll investigate more when I get a chance.... maybe someone's messed with it :-(
iirc it's a 2600psi pump and I set the unloader valve to 2300 because I read it was better to set it low so it was always in use and won't seize up (or something like that)
It’s usually two pressure switches required for auto stop unless the unloader has it built in. One fitted to the pump outlet that keeps it running and one in the trapped line after the unloader or in the pressure port on the unloader that is there to enable it to start when the trigger is pulled
the diesel fired ones I had worked like that, problem was if the pressure dropped they'd kick the pump on again for a few seconds just to turn off again
The last thing you want is a tank of warm water, a huge breeding ground for bacteria like legionella.Could you not return the bypass water to the 200 litre tank. This would slow the heat rise in the pump and slow the incoming cooler water entering the tank.
Could you not return the bypass water to the 200 litre tank. This would slow the heat rise in the pump and slow the incoming cooler water entering the tank.
yes... but will save that for later when I change the hot water system around, don;t want to replumb it now then do it again later
I'm still at work, just fitted the new unloader.... in use running about 2200psi, trigger off pressure jumps to 2500psi.... do the unloaders trap some pressure between the unloader and lance, and then let the rest bypass?
if I wind running pressure any higher it jumps to about 3000psi on trigger off, I'm guessing that's a bit much?
not 100% sure on my pressure valve..... it reads 200psi when it should be zero :-o
The last thing you want is a tank of warm water, a huge breeding ground for bacteria like legionella
storage tank is 200litres right now, which has a built in 50kw heater, and it's fed water through a 50kw inline boiler