Viessmann vitodens 200 low modulation low run time high return temp
Viessmann vitodens 200 low modulation low run time high return temp
Hi brand new install of a 30kw 200 combi
And it isn't doing what I'd expect or hoped
It's set with a 50c Max temp range rated to 23% heatloss is less than 7kwh
But it is having very short burn runs of about 5-7 minutes
And I'm only getting about a 10c drop between flow and return yet I designed the rads to give me 20c
I've turned min and max pump speeds down to 5/20 yet hasn't made a difference
I'm using preset rad valves so flow through the rads should be as designed
Any thoughts
by monkeysballs
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum
Viessmann vitodens 200 low modulation low run time high return temp
Hi brand new install of a 30kw 200 combi
And it isn't doing what I'd expect or hoped
It's set with a 50c Max temp range rated to 23% heatloss is less than 7kwh
But it is having very short burn runs of about 5-7 minutes
And I'm only getting about a 10c drop between flow and return yet I designed the rads to give me 20c
I've turned min and max pump speeds down to 5/20 yet hasn't made a difference
I'm using preset rad valves so flow through the rads should be as designed
Any thoughts
by monkeysballs
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum