Yes, you're right there is an embossed arrow on the side of the new pump and it is going up the flow is right and the flow valves seem to adjust the two independent floor loops fine, one run is about 3 times the other.
It takes a while to get all of the air out of the main boiler circuit when I've drained out the mixing valve to change the stat but I know I bled the Ufh loops well and the air bleeds on the manifold work fine and the Ufh pump runs quiet and smoothly, there's a manual air bleed in the airing cupboard just after the HW tank 2 port, that traps a little air but the main trap is a taller bathroom towel radiator which was originally just a standard lower rad, changed by the previous owner. I've put an Saladin auto vent on that but it seems to stick too easily even though the system is very clean.
The original setup was a conventional y plan with a tank side flange for the showers and an always on T for the bathroom rads. the boiler is an old but surprisingly capable potterton suprima 60 that has no trouble meeting demand and its own temp dial is only ever needed at about 1/3. The main system pump is on minimum setting a is the Ufh pump.
I removed the y plan 3 port and changed to s plan 2 x 2 ports first, then when I was sure that all worked I joined up the Ufh as a Third zone. It looks a tangle in the airing cupboard but it's pretty straightforward just a small space with a few more elbows than would look nice and neat.
It takes a while to get all of the air out of the main boiler circuit when I've drained out the mixing valve to change the stat but I know I bled the Ufh loops well and the air bleeds on the manifold work fine and the Ufh pump runs quiet and smoothly, there's a manual air bleed in the airing cupboard just after the HW tank 2 port, that traps a little air but the main trap is a taller bathroom towel radiator which was originally just a standard lower rad, changed by the previous owner. I've put an Saladin auto vent on that but it seems to stick too easily even though the system is very clean.
The original setup was a conventional y plan with a tank side flange for the showers and an always on T for the bathroom rads. the boiler is an old but surprisingly capable potterton suprima 60 that has no trouble meeting demand and its own temp dial is only ever needed at about 1/3. The main system pump is on minimum setting a is the Ufh pump.
I removed the y plan 3 port and changed to s plan 2 x 2 ports first, then when I was sure that all worked I joined up the Ufh as a Third zone. It looks a tangle in the airing cupboard but it's pretty straightforward just a small space with a few more elbows than would look nice and neat.