Indirect water cylinder

[desktop987456]

what does mSS mean

Don't know but see attached extracted from a manual for indirect. I have read a term mWC (meters water column). This is similar to mine but a bigger tank volume (500 litres). I am assuming mine with a lower flow rate than 6.5m3/hr would have less mWC (~1m?).

heat only boiler then that 6M Wilo will also be fin

Its a heat only boiler with no pump inside it. I have bought an external wilo pump (pico) with 6m head.

Not sure about pipe size to use and hence the question: should 22mm be fine considering the boiler has 22mm flow and return pipe to it. or go with 28mm pipe.

 

[Johntheo5]

Don't know but see attached extracted from a manual for indirect. I have read a term mWC (meters water column). This is similar to mine but a bigger tank volume (500 litres). I am assuming mine with a lower flow rate than 6.5m3/hr would have less mWC (~1m?).

That would only be true if the same coil is used in your cylinder, which I doubt, IF it was the same coil and assuming you will circulate 1.0m3/hr max then the coil resistance would fall to 2.9*(1/6.5)squared, 0.06mWc which is only 2.4inches, highy unlikely IMO, I still think you will be fine but no harm in asking the supplier to clarify this with Alarko, I tried emailing them just now but getting "address not found".

Don't know but see attached extracted from a manual for indirect. I have read a term mWC (meters water column). This is similar to mine but a bigger tank volume (500 litres). I am assuming mine with a lower flow rate than 6.5m3/hr would have less mWC (~1m?).

Its a heat only boiler with no pump inside it. I have bought an external wilo pump (pico) with 6m head.

Not sure about pipe size to use and hence the question: should 22mm be fine considering the boiler has 22mm flow and return pipe to it. or go with 28mm pipe.

I have one of those 6m Wilo Yonos Pico pumps, a lovely pump with infinite settings in Constant Pressure & Proportional Pressue modes.

I dont think you will have any problem with 22mm piping.

One other thing, you quote a cylinder capacity of 120L but one would think the model "160" is 160L capacity?, even better.
Will your (boiler) system be sealed??