is system pump big enough

[ICETER]

hey lads,
i am currently installing a viessmann vitodens 100 35kw system boiler,my question is the boiler is 20metres away from the furthest rad as this is the only place it can go,the boiler is downstairs in a boarding school but is feeding an upstairs apartment,but is the pump incorparated within the boiler good enough to do the system or will i have to put a second pump on to drive it,i doubt the pump in boiler is big enough myself but was just looking for a second opinion,thanks in advance

 

[Boilerman2]

Most system boilers Viessmann included fit a pump which will be more than sufficient to serve the purpose - fitting additional pumps can cause a lot of problems - if you wish to fit another pump I would urge you to connect the boiler to the system using a Low Loss Header to prevent any hydronic problems

 

[ICETER]

thanks for reply,i was just suspicious as to whether it would pump as far as i want or would it just evetually creep in?

 

[ianniann]

You know how to size the pipework, right? Well size it and see if the pump is big enough. If not, size it a bit bigger A modern system boiler pump will pump an awful long way in good sized pipes.