Hi All
Friend has recently bought a barn conversion with the above installed
(greenstore 11 I think). It has been set up in such a way that it appears
there is no control over the hot water, if the temprature of the tank water
is low the heat pump runs to heat it up. This means that the solar thermal
doesnt have time to heat the water. For example if they have showers early
in the morning by the time the sun is up enough to provide any hot water
because the ground source heat pump has already heated the water.

Anybody know how this should be set up. My friend has asked the WB
technician who came to sort out another problem but was effectively told
that they had set the system up the correct way - seems a little daft to
me!!
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(º€¢.¸(¨*€¢.¸ ¸.€¢*¨)¸.€¢Âº)
.€¢Â°€¢. Nik .€¢Â°€¢.
(¸.€¢Âº(¸.€¢Â¨* *¨€¢.¸)º€¢.¸)

On Tue, 8 Nov 2011 21:00:01 +0000, Ghostrecon wrote:

It has been set up in such a way that it appears there is no control
over the hot water, if the temprature of the tank water is low the heat
pump runs to heat it up. This means that the solar thermal doesnt have
time to heat the water.

What are the trigger temperatures, on and off, for the for the heat
pump to run? I'm about to be learning the hard way on this with an
oil boiler backing up a thermal store with inputs from solar thermal
and a wood burner.

As I currently understand it to have hot water on demand the store
has to be maintained at a minimum temp. So the heat pump needs to be
switched on if the store gets down to say 50C but to allow solar
thermal a chance it should switch off at say 55C. I guess you can get
clever with timers and adjust the on/off temps of the heat pump based
on time of day. Say at 1800 move the on to 60C and the off to 80C.
This would fully charge the store after any solar thermal had done
it's stuff but might mean the store is too warm the next day...

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Cheers
Dave.